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DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/match_costs/builder.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from mmcv.utils import Registry, build_from_cfg
MATCH_COST = Registry('Match Cost')
def build_match_cost(cfg, default_args=None):
"""Builder of IoU calculator."""
return build_from_cfg(cfg, MATCH_COST, default_args)
| 275 | 26.6 | 56 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/coder/yolo_bbox_coder.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import mmcv
import torch
from ..builder import BBOX_CODERS
from .base_bbox_coder import BaseBBoxCoder
@BBOX_CODERS.register_module()
class YOLOBBoxCoder(BaseBBoxCoder):
"""YOLO BBox coder.
Following `YOLO <https://arxiv.org/abs/1506.02640>`_, this coder divide
image into grids, and encode bbox (x1, y1, x2, y2) into (cx, cy, dw, dh).
cx, cy in [0., 1.], denotes relative center position w.r.t the center of
bboxes. dw, dh are the same as :obj:`DeltaXYWHBBoxCoder`.
Args:
eps (float): Min value of cx, cy when encoding.
"""
def __init__(self, eps=1e-6):
super(BaseBBoxCoder, self).__init__()
self.eps = eps
@mmcv.jit(coderize=True)
def encode(self, bboxes, gt_bboxes, stride):
"""Get box regression transformation deltas that can be used to
transform the ``bboxes`` into the ``gt_bboxes``.
Args:
bboxes (torch.Tensor): Source boxes, e.g., anchors.
gt_bboxes (torch.Tensor): Target of the transformation, e.g.,
ground-truth boxes.
stride (torch.Tensor | int): Stride of bboxes.
Returns:
torch.Tensor: Box transformation deltas
"""
assert bboxes.size(0) == gt_bboxes.size(0)
assert bboxes.size(-1) == gt_bboxes.size(-1) == 4
x_center_gt = (gt_bboxes[..., 0] + gt_bboxes[..., 2]) * 0.5
y_center_gt = (gt_bboxes[..., 1] + gt_bboxes[..., 3]) * 0.5
w_gt = gt_bboxes[..., 2] - gt_bboxes[..., 0]
h_gt = gt_bboxes[..., 3] - gt_bboxes[..., 1]
x_center = (bboxes[..., 0] + bboxes[..., 2]) * 0.5
y_center = (bboxes[..., 1] + bboxes[..., 3]) * 0.5
w = bboxes[..., 2] - bboxes[..., 0]
h = bboxes[..., 3] - bboxes[..., 1]
w_target = torch.log((w_gt / w).clamp(min=self.eps))
h_target = torch.log((h_gt / h).clamp(min=self.eps))
x_center_target = ((x_center_gt - x_center) / stride + 0.5).clamp(
self.eps, 1 - self.eps)
y_center_target = ((y_center_gt - y_center) / stride + 0.5).clamp(
self.eps, 1 - self.eps)
encoded_bboxes = torch.stack(
[x_center_target, y_center_target, w_target, h_target], dim=-1)
return encoded_bboxes
@mmcv.jit(coderize=True)
def decode(self, bboxes, pred_bboxes, stride):
"""Apply transformation `pred_bboxes` to `boxes`.
Args:
boxes (torch.Tensor): Basic boxes, e.g. anchors.
pred_bboxes (torch.Tensor): Encoded boxes with shape
stride (torch.Tensor | int): Strides of bboxes.
Returns:
torch.Tensor: Decoded boxes.
"""
assert pred_bboxes.size(-1) == bboxes.size(-1) == 4
xy_centers = (bboxes[..., :2] + bboxes[..., 2:]) * 0.5 + (
pred_bboxes[..., :2] - 0.5) * stride
whs = (bboxes[..., 2:] -
bboxes[..., :2]) * 0.5 * pred_bboxes[..., 2:].exp()
decoded_bboxes = torch.stack(
(xy_centers[..., 0] - whs[..., 0], xy_centers[..., 1] -
whs[..., 1], xy_centers[..., 0] + whs[..., 0],
xy_centers[..., 1] + whs[..., 1]),
dim=-1)
return decoded_bboxes
| 3,252 | 37.72619 | 77 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/coder/distance_point_bbox_coder.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import BBOX_CODERS
from ..transforms import bbox2distance, distance2bbox
from .base_bbox_coder import BaseBBoxCoder
@BBOX_CODERS.register_module()
class DistancePointBBoxCoder(BaseBBoxCoder):
"""Distance Point BBox coder.
This coder encodes gt bboxes (x1, y1, x2, y2) into (top, bottom, left,
right) and decode it back to the original.
Args:
clip_border (bool, optional): Whether clip the objects outside the
border of the image. Defaults to True.
"""
def __init__(self, clip_border=True):
super(BaseBBoxCoder, self).__init__()
self.clip_border = clip_border
def encode(self, points, gt_bboxes, max_dis=None, eps=0.1):
"""Encode bounding box to distances.
Args:
points (Tensor): Shape (N, 2), The format is [x, y].
gt_bboxes (Tensor): Shape (N, 4), The format is "xyxy"
max_dis (float): Upper bound of the distance. Default None.
eps (float): a small value to ensure target < max_dis, instead <=.
Default 0.1.
Returns:
Tensor: Box transformation deltas. The shape is (N, 4).
"""
assert points.size(0) == gt_bboxes.size(0)
assert points.size(-1) == 2
assert gt_bboxes.size(-1) == 4
return bbox2distance(points, gt_bboxes, max_dis, eps)
def decode(self, points, pred_bboxes, max_shape=None):
"""Decode distance prediction to bounding box.
Args:
points (Tensor): Shape (B, N, 2) or (N, 2).
pred_bboxes (Tensor): Distance from the given point to 4
boundaries (left, top, right, bottom). Shape (B, N, 4)
or (N, 4)
max_shape (Sequence[int] or torch.Tensor or Sequence[
Sequence[int]],optional): Maximum bounds for boxes, specifies
(H, W, C) or (H, W). If priors shape is (B, N, 4), then
the max_shape should be a Sequence[Sequence[int]],
and the length of max_shape should also be B.
Default None.
Returns:
Tensor: Boxes with shape (N, 4) or (B, N, 4)
"""
assert points.size(0) == pred_bboxes.size(0)
assert points.size(-1) == 2
assert pred_bboxes.size(-1) == 4
if self.clip_border is False:
max_shape = None
return distance2bbox(points, pred_bboxes, max_shape)
| 2,481 | 37.78125 | 78 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/coder/bucketing_bbox_coder.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import mmcv
import numpy as np
import torch
import torch.nn.functional as F
from ..builder import BBOX_CODERS
from ..transforms import bbox_rescale
from .base_bbox_coder import BaseBBoxCoder
@BBOX_CODERS.register_module()
class BucketingBBoxCoder(BaseBBoxCoder):
"""Bucketing BBox Coder for Side-Aware Boundary Localization (SABL).
Boundary Localization with Bucketing and Bucketing Guided Rescoring
are implemented here.
Please refer to https://arxiv.org/abs/1912.04260 for more details.
Args:
num_buckets (int): Number of buckets.
scale_factor (int): Scale factor of proposals to generate buckets.
offset_topk (int): Topk buckets are used to generate
bucket fine regression targets. Defaults to 2.
offset_upperbound (float): Offset upperbound to generate
bucket fine regression targets.
To avoid too large offset displacements. Defaults to 1.0.
cls_ignore_neighbor (bool): Ignore second nearest bucket or Not.
Defaults to True.
clip_border (bool, optional): Whether clip the objects outside the
border of the image. Defaults to True.
"""
def __init__(self,
num_buckets,
scale_factor,
offset_topk=2,
offset_upperbound=1.0,
cls_ignore_neighbor=True,
clip_border=True):
super(BucketingBBoxCoder, self).__init__()
self.num_buckets = num_buckets
self.scale_factor = scale_factor
self.offset_topk = offset_topk
self.offset_upperbound = offset_upperbound
self.cls_ignore_neighbor = cls_ignore_neighbor
self.clip_border = clip_border
def encode(self, bboxes, gt_bboxes):
"""Get bucketing estimation and fine regression targets during
training.
Args:
bboxes (torch.Tensor): source boxes, e.g., object proposals.
gt_bboxes (torch.Tensor): target of the transformation, e.g.,
ground truth boxes.
Returns:
encoded_bboxes(tuple[Tensor]): bucketing estimation
and fine regression targets and weights
"""
assert bboxes.size(0) == gt_bboxes.size(0)
assert bboxes.size(-1) == gt_bboxes.size(-1) == 4
encoded_bboxes = bbox2bucket(bboxes, gt_bboxes, self.num_buckets,
self.scale_factor, self.offset_topk,
self.offset_upperbound,
self.cls_ignore_neighbor)
return encoded_bboxes
def decode(self, bboxes, pred_bboxes, max_shape=None):
"""Apply transformation `pred_bboxes` to `boxes`.
Args:
boxes (torch.Tensor): Basic boxes.
pred_bboxes (torch.Tensor): Predictions for bucketing estimation
and fine regression
max_shape (tuple[int], optional): Maximum shape of boxes.
Defaults to None.
Returns:
torch.Tensor: Decoded boxes.
"""
assert len(pred_bboxes) == 2
cls_preds, offset_preds = pred_bboxes
assert cls_preds.size(0) == bboxes.size(0) and offset_preds.size(
0) == bboxes.size(0)
decoded_bboxes = bucket2bbox(bboxes, cls_preds, offset_preds,
self.num_buckets, self.scale_factor,
max_shape, self.clip_border)
return decoded_bboxes
@mmcv.jit(coderize=True)
def generat_buckets(proposals, num_buckets, scale_factor=1.0):
"""Generate buckets w.r.t bucket number and scale factor of proposals.
Args:
proposals (Tensor): Shape (n, 4)
num_buckets (int): Number of buckets.
scale_factor (float): Scale factor to rescale proposals.
Returns:
tuple[Tensor]: (bucket_w, bucket_h, l_buckets, r_buckets,
t_buckets, d_buckets)
- bucket_w: Width of buckets on x-axis. Shape (n, ).
- bucket_h: Height of buckets on y-axis. Shape (n, ).
- l_buckets: Left buckets. Shape (n, ceil(side_num/2)).
- r_buckets: Right buckets. Shape (n, ceil(side_num/2)).
- t_buckets: Top buckets. Shape (n, ceil(side_num/2)).
- d_buckets: Down buckets. Shape (n, ceil(side_num/2)).
"""
proposals = bbox_rescale(proposals, scale_factor)
# number of buckets in each side
side_num = int(np.ceil(num_buckets / 2.0))
pw = proposals[..., 2] - proposals[..., 0]
ph = proposals[..., 3] - proposals[..., 1]
px1 = proposals[..., 0]
py1 = proposals[..., 1]
px2 = proposals[..., 2]
py2 = proposals[..., 3]
bucket_w = pw / num_buckets
bucket_h = ph / num_buckets
# left buckets
l_buckets = px1[:, None] + (0.5 + torch.arange(
0, side_num).to(proposals).float())[None, :] * bucket_w[:, None]
# right buckets
r_buckets = px2[:, None] - (0.5 + torch.arange(
0, side_num).to(proposals).float())[None, :] * bucket_w[:, None]
# top buckets
t_buckets = py1[:, None] + (0.5 + torch.arange(
0, side_num).to(proposals).float())[None, :] * bucket_h[:, None]
# down buckets
d_buckets = py2[:, None] - (0.5 + torch.arange(
0, side_num).to(proposals).float())[None, :] * bucket_h[:, None]
return bucket_w, bucket_h, l_buckets, r_buckets, t_buckets, d_buckets
@mmcv.jit(coderize=True)
def bbox2bucket(proposals,
gt,
num_buckets,
scale_factor,
offset_topk=2,
offset_upperbound=1.0,
cls_ignore_neighbor=True):
"""Generate buckets estimation and fine regression targets.
Args:
proposals (Tensor): Shape (n, 4)
gt (Tensor): Shape (n, 4)
num_buckets (int): Number of buckets.
scale_factor (float): Scale factor to rescale proposals.
offset_topk (int): Topk buckets are used to generate
bucket fine regression targets. Defaults to 2.
offset_upperbound (float): Offset allowance to generate
bucket fine regression targets.
To avoid too large offset displacements. Defaults to 1.0.
cls_ignore_neighbor (bool): Ignore second nearest bucket or Not.
Defaults to True.
Returns:
tuple[Tensor]: (offsets, offsets_weights, bucket_labels, cls_weights).
- offsets: Fine regression targets. \
Shape (n, num_buckets*2).
- offsets_weights: Fine regression weights. \
Shape (n, num_buckets*2).
- bucket_labels: Bucketing estimation labels. \
Shape (n, num_buckets*2).
- cls_weights: Bucketing estimation weights. \
Shape (n, num_buckets*2).
"""
assert proposals.size() == gt.size()
# generate buckets
proposals = proposals.float()
gt = gt.float()
(bucket_w, bucket_h, l_buckets, r_buckets, t_buckets,
d_buckets) = generat_buckets(proposals, num_buckets, scale_factor)
gx1 = gt[..., 0]
gy1 = gt[..., 1]
gx2 = gt[..., 2]
gy2 = gt[..., 3]
# generate offset targets and weights
# offsets from buckets to gts
l_offsets = (l_buckets - gx1[:, None]) / bucket_w[:, None]
r_offsets = (r_buckets - gx2[:, None]) / bucket_w[:, None]
t_offsets = (t_buckets - gy1[:, None]) / bucket_h[:, None]
d_offsets = (d_buckets - gy2[:, None]) / bucket_h[:, None]
# select top-k nearest buckets
l_topk, l_label = l_offsets.abs().topk(
offset_topk, dim=1, largest=False, sorted=True)
r_topk, r_label = r_offsets.abs().topk(
offset_topk, dim=1, largest=False, sorted=True)
t_topk, t_label = t_offsets.abs().topk(
offset_topk, dim=1, largest=False, sorted=True)
d_topk, d_label = d_offsets.abs().topk(
offset_topk, dim=1, largest=False, sorted=True)
offset_l_weights = l_offsets.new_zeros(l_offsets.size())
offset_r_weights = r_offsets.new_zeros(r_offsets.size())
offset_t_weights = t_offsets.new_zeros(t_offsets.size())
offset_d_weights = d_offsets.new_zeros(d_offsets.size())
inds = torch.arange(0, proposals.size(0)).to(proposals).long()
# generate offset weights of top-k nearest buckets
for k in range(offset_topk):
if k >= 1:
offset_l_weights[inds, l_label[:,
k]] = (l_topk[:, k] <
offset_upperbound).float()
offset_r_weights[inds, r_label[:,
k]] = (r_topk[:, k] <
offset_upperbound).float()
offset_t_weights[inds, t_label[:,
k]] = (t_topk[:, k] <
offset_upperbound).float()
offset_d_weights[inds, d_label[:,
k]] = (d_topk[:, k] <
offset_upperbound).float()
else:
offset_l_weights[inds, l_label[:, k]] = 1.0
offset_r_weights[inds, r_label[:, k]] = 1.0
offset_t_weights[inds, t_label[:, k]] = 1.0
offset_d_weights[inds, d_label[:, k]] = 1.0
offsets = torch.cat([l_offsets, r_offsets, t_offsets, d_offsets], dim=-1)
offsets_weights = torch.cat([
offset_l_weights, offset_r_weights, offset_t_weights, offset_d_weights
],
dim=-1)
# generate bucket labels and weight
side_num = int(np.ceil(num_buckets / 2.0))
labels = torch.stack(
[l_label[:, 0], r_label[:, 0], t_label[:, 0], d_label[:, 0]], dim=-1)
batch_size = labels.size(0)
bucket_labels = F.one_hot(labels.view(-1), side_num).view(batch_size,
-1).float()
bucket_cls_l_weights = (l_offsets.abs() < 1).float()
bucket_cls_r_weights = (r_offsets.abs() < 1).float()
bucket_cls_t_weights = (t_offsets.abs() < 1).float()
bucket_cls_d_weights = (d_offsets.abs() < 1).float()
bucket_cls_weights = torch.cat([
bucket_cls_l_weights, bucket_cls_r_weights, bucket_cls_t_weights,
bucket_cls_d_weights
],
dim=-1)
# ignore second nearest buckets for cls if necessary
if cls_ignore_neighbor:
bucket_cls_weights = (~((bucket_cls_weights == 1) &
(bucket_labels == 0))).float()
else:
bucket_cls_weights[:] = 1.0
return offsets, offsets_weights, bucket_labels, bucket_cls_weights
@mmcv.jit(coderize=True)
def bucket2bbox(proposals,
cls_preds,
offset_preds,
num_buckets,
scale_factor=1.0,
max_shape=None,
clip_border=True):
"""Apply bucketing estimation (cls preds) and fine regression (offset
preds) to generate det bboxes.
Args:
proposals (Tensor): Boxes to be transformed. Shape (n, 4)
cls_preds (Tensor): bucketing estimation. Shape (n, num_buckets*2).
offset_preds (Tensor): fine regression. Shape (n, num_buckets*2).
num_buckets (int): Number of buckets.
scale_factor (float): Scale factor to rescale proposals.
max_shape (tuple[int, int]): Maximum bounds for boxes. specifies (H, W)
clip_border (bool, optional): Whether clip the objects outside the
border of the image. Defaults to True.
Returns:
tuple[Tensor]: (bboxes, loc_confidence).
- bboxes: predicted bboxes. Shape (n, 4)
- loc_confidence: localization confidence of predicted bboxes.
Shape (n,).
"""
side_num = int(np.ceil(num_buckets / 2.0))
cls_preds = cls_preds.view(-1, side_num)
offset_preds = offset_preds.view(-1, side_num)
scores = F.softmax(cls_preds, dim=1)
score_topk, score_label = scores.topk(2, dim=1, largest=True, sorted=True)
rescaled_proposals = bbox_rescale(proposals, scale_factor)
pw = rescaled_proposals[..., 2] - rescaled_proposals[..., 0]
ph = rescaled_proposals[..., 3] - rescaled_proposals[..., 1]
px1 = rescaled_proposals[..., 0]
py1 = rescaled_proposals[..., 1]
px2 = rescaled_proposals[..., 2]
py2 = rescaled_proposals[..., 3]
bucket_w = pw / num_buckets
bucket_h = ph / num_buckets
score_inds_l = score_label[0::4, 0]
score_inds_r = score_label[1::4, 0]
score_inds_t = score_label[2::4, 0]
score_inds_d = score_label[3::4, 0]
l_buckets = px1 + (0.5 + score_inds_l.float()) * bucket_w
r_buckets = px2 - (0.5 + score_inds_r.float()) * bucket_w
t_buckets = py1 + (0.5 + score_inds_t.float()) * bucket_h
d_buckets = py2 - (0.5 + score_inds_d.float()) * bucket_h
offsets = offset_preds.view(-1, 4, side_num)
inds = torch.arange(proposals.size(0)).to(proposals).long()
l_offsets = offsets[:, 0, :][inds, score_inds_l]
r_offsets = offsets[:, 1, :][inds, score_inds_r]
t_offsets = offsets[:, 2, :][inds, score_inds_t]
d_offsets = offsets[:, 3, :][inds, score_inds_d]
x1 = l_buckets - l_offsets * bucket_w
x2 = r_buckets - r_offsets * bucket_w
y1 = t_buckets - t_offsets * bucket_h
y2 = d_buckets - d_offsets * bucket_h
if clip_border and max_shape is not None:
x1 = x1.clamp(min=0, max=max_shape[1] - 1)
y1 = y1.clamp(min=0, max=max_shape[0] - 1)
x2 = x2.clamp(min=0, max=max_shape[1] - 1)
y2 = y2.clamp(min=0, max=max_shape[0] - 1)
bboxes = torch.cat([x1[:, None], y1[:, None], x2[:, None], y2[:, None]],
dim=-1)
# bucketing guided rescoring
loc_confidence = score_topk[:, 0]
top2_neighbor_inds = (score_label[:, 0] - score_label[:, 1]).abs() == 1
loc_confidence += score_topk[:, 1] * top2_neighbor_inds.float()
loc_confidence = loc_confidence.view(-1, 4).mean(dim=1)
return bboxes, loc_confidence
| 14,119 | 39.113636 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/coder/pseudo_bbox_coder.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import BBOX_CODERS
from .base_bbox_coder import BaseBBoxCoder
@BBOX_CODERS.register_module()
class PseudoBBoxCoder(BaseBBoxCoder):
"""Pseudo bounding box coder."""
def __init__(self, **kwargs):
super(BaseBBoxCoder, self).__init__(**kwargs)
def encode(self, bboxes, gt_bboxes):
"""torch.Tensor: return the given ``bboxes``"""
return gt_bboxes
def decode(self, bboxes, pred_bboxes):
"""torch.Tensor: return the given ``pred_bboxes``"""
return pred_bboxes
| 577 | 27.9 | 60 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/coder/base_bbox_coder.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from abc import ABCMeta, abstractmethod
class BaseBBoxCoder(metaclass=ABCMeta):
"""Base bounding box coder."""
def __init__(self, **kwargs):
pass
@abstractmethod
def encode(self, bboxes, gt_bboxes):
"""Encode deltas between bboxes and ground truth boxes."""
@abstractmethod
def decode(self, bboxes, bboxes_pred):
"""Decode the predicted bboxes according to prediction and base
boxes."""
| 496 | 25.157895 | 71 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/coder/tblr_bbox_coder.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import mmcv
import torch
from ..builder import BBOX_CODERS
from .base_bbox_coder import BaseBBoxCoder
@BBOX_CODERS.register_module()
class TBLRBBoxCoder(BaseBBoxCoder):
"""TBLR BBox coder.
Following the practice in `FSAF <https://arxiv.org/abs/1903.00621>`_,
this coder encodes gt bboxes (x1, y1, x2, y2) into (top, bottom, left,
right) and decode it back to the original.
Args:
normalizer (list | float): Normalization factor to be
divided with when coding the coordinates. If it is a list, it should
have length of 4 indicating normalization factor in tblr dims.
Otherwise it is a unified float factor for all dims. Default: 4.0
clip_border (bool, optional): Whether clip the objects outside the
border of the image. Defaults to True.
"""
def __init__(self, normalizer=4.0, clip_border=True):
super(BaseBBoxCoder, self).__init__()
self.normalizer = normalizer
self.clip_border = clip_border
def encode(self, bboxes, gt_bboxes):
"""Get box regression transformation deltas that can be used to
transform the ``bboxes`` into the ``gt_bboxes`` in the (top, left,
bottom, right) order.
Args:
bboxes (torch.Tensor): source boxes, e.g., object proposals.
gt_bboxes (torch.Tensor): target of the transformation, e.g.,
ground truth boxes.
Returns:
torch.Tensor: Box transformation deltas
"""
assert bboxes.size(0) == gt_bboxes.size(0)
assert bboxes.size(-1) == gt_bboxes.size(-1) == 4
encoded_bboxes = bboxes2tblr(
bboxes, gt_bboxes, normalizer=self.normalizer)
return encoded_bboxes
def decode(self, bboxes, pred_bboxes, max_shape=None):
"""Apply transformation `pred_bboxes` to `boxes`.
Args:
bboxes (torch.Tensor): Basic boxes.Shape (B, N, 4) or (N, 4)
pred_bboxes (torch.Tensor): Encoded boxes with shape
(B, N, 4) or (N, 4)
max_shape (Sequence[int] or torch.Tensor or Sequence[
Sequence[int]],optional): Maximum bounds for boxes, specifies
(H, W, C) or (H, W). If bboxes shape is (B, N, 4), then
the max_shape should be a Sequence[Sequence[int]]
and the length of max_shape should also be B.
Returns:
torch.Tensor: Decoded boxes.
"""
decoded_bboxes = tblr2bboxes(
bboxes,
pred_bboxes,
normalizer=self.normalizer,
max_shape=max_shape,
clip_border=self.clip_border)
return decoded_bboxes
@mmcv.jit(coderize=True)
def bboxes2tblr(priors, gts, normalizer=4.0, normalize_by_wh=True):
"""Encode ground truth boxes to tblr coordinate.
It first convert the gt coordinate to tblr format,
(top, bottom, left, right), relative to prior box centers.
The tblr coordinate may be normalized by the side length of prior bboxes
if `normalize_by_wh` is specified as True, and it is then normalized by
the `normalizer` factor.
Args:
priors (Tensor): Prior boxes in point form
Shape: (num_proposals,4).
gts (Tensor): Coords of ground truth for each prior in point-form
Shape: (num_proposals, 4).
normalizer (Sequence[float] | float): normalization parameter of
encoded boxes. If it is a list, it has to have length = 4.
Default: 4.0
normalize_by_wh (bool): Whether to normalize tblr coordinate by the
side length (wh) of prior bboxes.
Return:
encoded boxes (Tensor), Shape: (num_proposals, 4)
"""
# dist b/t match center and prior's center
if not isinstance(normalizer, float):
normalizer = torch.tensor(normalizer, device=priors.device)
assert len(normalizer) == 4, 'Normalizer must have length = 4'
assert priors.size(0) == gts.size(0)
prior_centers = (priors[:, 0:2] + priors[:, 2:4]) / 2
xmin, ymin, xmax, ymax = gts.split(1, dim=1)
top = prior_centers[:, 1].unsqueeze(1) - ymin
bottom = ymax - prior_centers[:, 1].unsqueeze(1)
left = prior_centers[:, 0].unsqueeze(1) - xmin
right = xmax - prior_centers[:, 0].unsqueeze(1)
loc = torch.cat((top, bottom, left, right), dim=1)
if normalize_by_wh:
# Normalize tblr by anchor width and height
wh = priors[:, 2:4] - priors[:, 0:2]
w, h = torch.split(wh, 1, dim=1)
loc[:, :2] /= h # tb is normalized by h
loc[:, 2:] /= w # lr is normalized by w
# Normalize tblr by the given normalization factor
return loc / normalizer
@mmcv.jit(coderize=True)
def tblr2bboxes(priors,
tblr,
normalizer=4.0,
normalize_by_wh=True,
max_shape=None,
clip_border=True):
"""Decode tblr outputs to prediction boxes.
The process includes 3 steps: 1) De-normalize tblr coordinates by
multiplying it with `normalizer`; 2) De-normalize tblr coordinates by the
prior bbox width and height if `normalize_by_wh` is `True`; 3) Convert
tblr (top, bottom, left, right) pair relative to the center of priors back
to (xmin, ymin, xmax, ymax) coordinate.
Args:
priors (Tensor): Prior boxes in point form (x0, y0, x1, y1)
Shape: (N,4) or (B, N, 4).
tblr (Tensor): Coords of network output in tblr form
Shape: (N, 4) or (B, N, 4).
normalizer (Sequence[float] | float): Normalization parameter of
encoded boxes. By list, it represents the normalization factors at
tblr dims. By float, it is the unified normalization factor at all
dims. Default: 4.0
normalize_by_wh (bool): Whether the tblr coordinates have been
normalized by the side length (wh) of prior bboxes.
max_shape (Sequence[int] or torch.Tensor or Sequence[
Sequence[int]],optional): Maximum bounds for boxes, specifies
(H, W, C) or (H, W). If priors shape is (B, N, 4), then
the max_shape should be a Sequence[Sequence[int]]
and the length of max_shape should also be B.
clip_border (bool, optional): Whether clip the objects outside the
border of the image. Defaults to True.
Return:
encoded boxes (Tensor): Boxes with shape (N, 4) or (B, N, 4)
"""
if not isinstance(normalizer, float):
normalizer = torch.tensor(normalizer, device=priors.device)
assert len(normalizer) == 4, 'Normalizer must have length = 4'
assert priors.size(0) == tblr.size(0)
if priors.ndim == 3:
assert priors.size(1) == tblr.size(1)
loc_decode = tblr * normalizer
prior_centers = (priors[..., 0:2] + priors[..., 2:4]) / 2
if normalize_by_wh:
wh = priors[..., 2:4] - priors[..., 0:2]
w, h = torch.split(wh, 1, dim=-1)
# Inplace operation with slice would failed for exporting to ONNX
th = h * loc_decode[..., :2] # tb
tw = w * loc_decode[..., 2:] # lr
loc_decode = torch.cat([th, tw], dim=-1)
# Cannot be exported using onnx when loc_decode.split(1, dim=-1)
top, bottom, left, right = loc_decode.split((1, 1, 1, 1), dim=-1)
xmin = prior_centers[..., 0].unsqueeze(-1) - left
xmax = prior_centers[..., 0].unsqueeze(-1) + right
ymin = prior_centers[..., 1].unsqueeze(-1) - top
ymax = prior_centers[..., 1].unsqueeze(-1) + bottom
bboxes = torch.cat((xmin, ymin, xmax, ymax), dim=-1)
if clip_border and max_shape is not None:
# clip bboxes with dynamic `min` and `max` for onnx
if torch.onnx.is_in_onnx_export():
from mmdet.core.export import dynamic_clip_for_onnx
xmin, ymin, xmax, ymax = dynamic_clip_for_onnx(
xmin, ymin, xmax, ymax, max_shape)
bboxes = torch.cat([xmin, ymin, xmax, ymax], dim=-1)
return bboxes
if not isinstance(max_shape, torch.Tensor):
max_shape = priors.new_tensor(max_shape)
max_shape = max_shape[..., :2].type_as(priors)
if max_shape.ndim == 2:
assert bboxes.ndim == 3
assert max_shape.size(0) == bboxes.size(0)
min_xy = priors.new_tensor(0)
max_xy = torch.cat([max_shape, max_shape],
dim=-1).flip(-1).unsqueeze(-2)
bboxes = torch.where(bboxes < min_xy, min_xy, bboxes)
bboxes = torch.where(bboxes > max_xy, max_xy, bboxes)
return bboxes
| 8,625 | 40.671498 | 78 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/coder/legacy_delta_xywh_bbox_coder.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import mmcv
import numpy as np
import torch
from ..builder import BBOX_CODERS
from .base_bbox_coder import BaseBBoxCoder
@BBOX_CODERS.register_module()
class LegacyDeltaXYWHBBoxCoder(BaseBBoxCoder):
"""Legacy Delta XYWH BBox coder used in MMDet V1.x.
Following the practice in R-CNN [1]_, this coder encodes bbox (x1, y1, x2,
y2) into delta (dx, dy, dw, dh) and decodes delta (dx, dy, dw, dh)
back to original bbox (x1, y1, x2, y2).
Note:
The main difference between :class`LegacyDeltaXYWHBBoxCoder` and
:class:`DeltaXYWHBBoxCoder` is whether ``+ 1`` is used during width and
height calculation. We suggest to only use this coder when testing with
MMDet V1.x models.
References:
.. [1] https://arxiv.org/abs/1311.2524
Args:
target_means (Sequence[float]): denormalizing means of target for
delta coordinates
target_stds (Sequence[float]): denormalizing standard deviation of
target for delta coordinates
"""
def __init__(self,
target_means=(0., 0., 0., 0.),
target_stds=(1., 1., 1., 1.)):
super(BaseBBoxCoder, self).__init__()
self.means = target_means
self.stds = target_stds
def encode(self, bboxes, gt_bboxes):
"""Get box regression transformation deltas that can be used to
transform the ``bboxes`` into the ``gt_bboxes``.
Args:
bboxes (torch.Tensor): source boxes, e.g., object proposals.
gt_bboxes (torch.Tensor): target of the transformation, e.g.,
ground-truth boxes.
Returns:
torch.Tensor: Box transformation deltas
"""
assert bboxes.size(0) == gt_bboxes.size(0)
assert bboxes.size(-1) == gt_bboxes.size(-1) == 4
encoded_bboxes = legacy_bbox2delta(bboxes, gt_bboxes, self.means,
self.stds)
return encoded_bboxes
def decode(self,
bboxes,
pred_bboxes,
max_shape=None,
wh_ratio_clip=16 / 1000):
"""Apply transformation `pred_bboxes` to `boxes`.
Args:
boxes (torch.Tensor): Basic boxes.
pred_bboxes (torch.Tensor): Encoded boxes with shape
max_shape (tuple[int], optional): Maximum shape of boxes.
Defaults to None.
wh_ratio_clip (float, optional): The allowed ratio between
width and height.
Returns:
torch.Tensor: Decoded boxes.
"""
assert pred_bboxes.size(0) == bboxes.size(0)
decoded_bboxes = legacy_delta2bbox(bboxes, pred_bboxes, self.means,
self.stds, max_shape, wh_ratio_clip)
return decoded_bboxes
@mmcv.jit(coderize=True)
def legacy_bbox2delta(proposals,
gt,
means=(0., 0., 0., 0.),
stds=(1., 1., 1., 1.)):
"""Compute deltas of proposals w.r.t. gt in the MMDet V1.x manner.
We usually compute the deltas of x, y, w, h of proposals w.r.t ground
truth bboxes to get regression target.
This is the inverse function of `delta2bbox()`
Args:
proposals (Tensor): Boxes to be transformed, shape (N, ..., 4)
gt (Tensor): Gt bboxes to be used as base, shape (N, ..., 4)
means (Sequence[float]): Denormalizing means for delta coordinates
stds (Sequence[float]): Denormalizing standard deviation for delta
coordinates
Returns:
Tensor: deltas with shape (N, 4), where columns represent dx, dy,
dw, dh.
"""
assert proposals.size() == gt.size()
proposals = proposals.float()
gt = gt.float()
px = (proposals[..., 0] + proposals[..., 2]) * 0.5
py = (proposals[..., 1] + proposals[..., 3]) * 0.5
pw = proposals[..., 2] - proposals[..., 0] + 1.0
ph = proposals[..., 3] - proposals[..., 1] + 1.0
gx = (gt[..., 0] + gt[..., 2]) * 0.5
gy = (gt[..., 1] + gt[..., 3]) * 0.5
gw = gt[..., 2] - gt[..., 0] + 1.0
gh = gt[..., 3] - gt[..., 1] + 1.0
dx = (gx - px) / pw
dy = (gy - py) / ph
dw = torch.log(gw / pw)
dh = torch.log(gh / ph)
deltas = torch.stack([dx, dy, dw, dh], dim=-1)
means = deltas.new_tensor(means).unsqueeze(0)
stds = deltas.new_tensor(stds).unsqueeze(0)
deltas = deltas.sub_(means).div_(stds)
return deltas
@mmcv.jit(coderize=True)
def legacy_delta2bbox(rois,
deltas,
means=(0., 0., 0., 0.),
stds=(1., 1., 1., 1.),
max_shape=None,
wh_ratio_clip=16 / 1000):
"""Apply deltas to shift/scale base boxes in the MMDet V1.x manner.
Typically the rois are anchor or proposed bounding boxes and the deltas are
network outputs used to shift/scale those boxes.
This is the inverse function of `bbox2delta()`
Args:
rois (Tensor): Boxes to be transformed. Has shape (N, 4)
deltas (Tensor): Encoded offsets with respect to each roi.
Has shape (N, 4 * num_classes). Note N = num_anchors * W * H when
rois is a grid of anchors. Offset encoding follows [1]_.
means (Sequence[float]): Denormalizing means for delta coordinates
stds (Sequence[float]): Denormalizing standard deviation for delta
coordinates
max_shape (tuple[int, int]): Maximum bounds for boxes. specifies (H, W)
wh_ratio_clip (float): Maximum aspect ratio for boxes.
Returns:
Tensor: Boxes with shape (N, 4), where columns represent
tl_x, tl_y, br_x, br_y.
References:
.. [1] https://arxiv.org/abs/1311.2524
Example:
>>> rois = torch.Tensor([[ 0., 0., 1., 1.],
>>> [ 0., 0., 1., 1.],
>>> [ 0., 0., 1., 1.],
>>> [ 5., 5., 5., 5.]])
>>> deltas = torch.Tensor([[ 0., 0., 0., 0.],
>>> [ 1., 1., 1., 1.],
>>> [ 0., 0., 2., -1.],
>>> [ 0.7, -1.9, -0.5, 0.3]])
>>> legacy_delta2bbox(rois, deltas, max_shape=(32, 32))
tensor([[0.0000, 0.0000, 1.5000, 1.5000],
[0.0000, 0.0000, 5.2183, 5.2183],
[0.0000, 0.1321, 7.8891, 0.8679],
[5.3967, 2.4251, 6.0033, 3.7749]])
"""
means = deltas.new_tensor(means).repeat(1, deltas.size(1) // 4)
stds = deltas.new_tensor(stds).repeat(1, deltas.size(1) // 4)
denorm_deltas = deltas * stds + means
dx = denorm_deltas[:, 0::4]
dy = denorm_deltas[:, 1::4]
dw = denorm_deltas[:, 2::4]
dh = denorm_deltas[:, 3::4]
max_ratio = np.abs(np.log(wh_ratio_clip))
dw = dw.clamp(min=-max_ratio, max=max_ratio)
dh = dh.clamp(min=-max_ratio, max=max_ratio)
# Compute center of each roi
px = ((rois[:, 0] + rois[:, 2]) * 0.5).unsqueeze(1).expand_as(dx)
py = ((rois[:, 1] + rois[:, 3]) * 0.5).unsqueeze(1).expand_as(dy)
# Compute width/height of each roi
pw = (rois[:, 2] - rois[:, 0] + 1.0).unsqueeze(1).expand_as(dw)
ph = (rois[:, 3] - rois[:, 1] + 1.0).unsqueeze(1).expand_as(dh)
# Use exp(network energy) to enlarge/shrink each roi
gw = pw * dw.exp()
gh = ph * dh.exp()
# Use network energy to shift the center of each roi
gx = px + pw * dx
gy = py + ph * dy
# Convert center-xy/width/height to top-left, bottom-right
# The true legacy box coder should +- 0.5 here.
# However, current implementation improves the performance when testing
# the models trained in MMDetection 1.X (~0.5 bbox AP, 0.2 mask AP)
x1 = gx - gw * 0.5
y1 = gy - gh * 0.5
x2 = gx + gw * 0.5
y2 = gy + gh * 0.5
if max_shape is not None:
x1 = x1.clamp(min=0, max=max_shape[1] - 1)
y1 = y1.clamp(min=0, max=max_shape[0] - 1)
x2 = x2.clamp(min=0, max=max_shape[1] - 1)
y2 = y2.clamp(min=0, max=max_shape[0] - 1)
bboxes = torch.stack([x1, y1, x2, y2], dim=-1).view_as(deltas)
return bboxes
| 8,257 | 37.0553 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/coder/delta_xywh_bbox_coder.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import warnings
import mmcv
import numpy as np
import torch
from ..builder import BBOX_CODERS
from .base_bbox_coder import BaseBBoxCoder
@BBOX_CODERS.register_module()
class DeltaXYWHBBoxCoder(BaseBBoxCoder):
"""Delta XYWH BBox coder.
Following the practice in `R-CNN <https://arxiv.org/abs/1311.2524>`_,
this coder encodes bbox (x1, y1, x2, y2) into delta (dx, dy, dw, dh) and
decodes delta (dx, dy, dw, dh) back to original bbox (x1, y1, x2, y2).
Args:
target_means (Sequence[float]): Denormalizing means of target for
delta coordinates
target_stds (Sequence[float]): Denormalizing standard deviation of
target for delta coordinates
clip_border (bool, optional): Whether clip the objects outside the
border of the image. Defaults to True.
add_ctr_clamp (bool): Whether to add center clamp, when added, the
predicted box is clamped is its center is too far away from
the original anchor's center. Only used by YOLOF. Default False.
ctr_clamp (int): the maximum pixel shift to clamp. Only used by YOLOF.
Default 32.
"""
def __init__(self,
target_means=(0., 0., 0., 0.),
target_stds=(1., 1., 1., 1.),
clip_border=True,
add_ctr_clamp=False,
ctr_clamp=32):
super(BaseBBoxCoder, self).__init__()
self.means = target_means
self.stds = target_stds
self.clip_border = clip_border
self.add_ctr_clamp = add_ctr_clamp
self.ctr_clamp = ctr_clamp
def encode(self, bboxes, gt_bboxes):
"""Get box regression transformation deltas that can be used to
transform the ``bboxes`` into the ``gt_bboxes``.
Args:
bboxes (torch.Tensor): Source boxes, e.g., object proposals.
gt_bboxes (torch.Tensor): Target of the transformation, e.g.,
ground-truth boxes.
Returns:
torch.Tensor: Box transformation deltas
"""
assert bboxes.size(0) == gt_bboxes.size(0)
assert bboxes.size(-1) == gt_bboxes.size(-1) == 4
encoded_bboxes = bbox2delta(bboxes, gt_bboxes, self.means, self.stds)
return encoded_bboxes
def decode(self,
bboxes,
pred_bboxes,
max_shape=None,
wh_ratio_clip=16 / 1000):
"""Apply transformation `pred_bboxes` to `boxes`.
Args:
bboxes (torch.Tensor): Basic boxes. Shape (B, N, 4) or (N, 4)
pred_bboxes (Tensor): Encoded offsets with respect to each roi.
Has shape (B, N, num_classes * 4) or (B, N, 4) or
(N, num_classes * 4) or (N, 4). Note N = num_anchors * W * H
when rois is a grid of anchors.Offset encoding follows [1]_.
max_shape (Sequence[int] or torch.Tensor or Sequence[
Sequence[int]],optional): Maximum bounds for boxes, specifies
(H, W, C) or (H, W). If bboxes shape is (B, N, 4), then
the max_shape should be a Sequence[Sequence[int]]
and the length of max_shape should also be B.
wh_ratio_clip (float, optional): The allowed ratio between
width and height.
Returns:
torch.Tensor: Decoded boxes.
"""
assert pred_bboxes.size(0) == bboxes.size(0)
if pred_bboxes.ndim == 3:
assert pred_bboxes.size(1) == bboxes.size(1)
if pred_bboxes.ndim == 2 and not torch.onnx.is_in_onnx_export():
# single image decode
decoded_bboxes = delta2bbox(bboxes, pred_bboxes, self.means,
self.stds, max_shape, wh_ratio_clip,
self.clip_border, self.add_ctr_clamp,
self.ctr_clamp)
else:
if pred_bboxes.ndim == 3 and not torch.onnx.is_in_onnx_export():
warnings.warn(
'DeprecationWarning: onnx_delta2bbox is deprecated '
'in the case of batch decoding and non-ONNX, '
'please use “delta2bbox” instead. In order to improve '
'the decoding speed, the batch function will no '
'longer be supported. ')
decoded_bboxes = onnx_delta2bbox(bboxes, pred_bboxes, self.means,
self.stds, max_shape,
wh_ratio_clip, self.clip_border,
self.add_ctr_clamp,
self.ctr_clamp)
return decoded_bboxes
@mmcv.jit(coderize=True)
def bbox2delta(proposals, gt, means=(0., 0., 0., 0.), stds=(1., 1., 1., 1.)):
"""Compute deltas of proposals w.r.t. gt.
We usually compute the deltas of x, y, w, h of proposals w.r.t ground
truth bboxes to get regression target.
This is the inverse function of :func:`delta2bbox`.
Args:
proposals (Tensor): Boxes to be transformed, shape (N, ..., 4)
gt (Tensor): Gt bboxes to be used as base, shape (N, ..., 4)
means (Sequence[float]): Denormalizing means for delta coordinates
stds (Sequence[float]): Denormalizing standard deviation for delta
coordinates
Returns:
Tensor: deltas with shape (N, 4), where columns represent dx, dy,
dw, dh.
"""
assert proposals.size() == gt.size()
proposals = proposals.float()
gt = gt.float()
px = (proposals[..., 0] + proposals[..., 2]) * 0.5
py = (proposals[..., 1] + proposals[..., 3]) * 0.5
pw = proposals[..., 2] - proposals[..., 0]
ph = proposals[..., 3] - proposals[..., 1]
gx = (gt[..., 0] + gt[..., 2]) * 0.5
gy = (gt[..., 1] + gt[..., 3]) * 0.5
gw = gt[..., 2] - gt[..., 0]
gh = gt[..., 3] - gt[..., 1]
dx = (gx - px) / pw
dy = (gy - py) / ph
dw = torch.log(gw / pw)
dh = torch.log(gh / ph)
deltas = torch.stack([dx, dy, dw, dh], dim=-1)
means = deltas.new_tensor(means).unsqueeze(0)
stds = deltas.new_tensor(stds).unsqueeze(0)
deltas = deltas.sub_(means).div_(stds)
return deltas
@mmcv.jit(coderize=True)
def delta2bbox(rois,
deltas,
means=(0., 0., 0., 0.),
stds=(1., 1., 1., 1.),
max_shape=None,
wh_ratio_clip=16 / 1000,
clip_border=True,
add_ctr_clamp=False,
ctr_clamp=32):
"""Apply deltas to shift/scale base boxes.
Typically the rois are anchor or proposed bounding boxes and the deltas are
network outputs used to shift/scale those boxes.
This is the inverse function of :func:`bbox2delta`.
Args:
rois (Tensor): Boxes to be transformed. Has shape (N, 4).
deltas (Tensor): Encoded offsets relative to each roi.
Has shape (N, num_classes * 4) or (N, 4). Note
N = num_base_anchors * W * H, when rois is a grid of
anchors. Offset encoding follows [1]_.
means (Sequence[float]): Denormalizing means for delta coordinates.
Default (0., 0., 0., 0.).
stds (Sequence[float]): Denormalizing standard deviation for delta
coordinates. Default (1., 1., 1., 1.).
max_shape (tuple[int, int]): Maximum bounds for boxes, specifies
(H, W). Default None.
wh_ratio_clip (float): Maximum aspect ratio for boxes. Default
16 / 1000.
clip_border (bool, optional): Whether clip the objects outside the
border of the image. Default True.
add_ctr_clamp (bool): Whether to add center clamp. When set to True,
the center of the prediction bounding box will be clamped to
avoid being too far away from the center of the anchor.
Only used by YOLOF. Default False.
ctr_clamp (int): the maximum pixel shift to clamp. Only used by YOLOF.
Default 32.
Returns:
Tensor: Boxes with shape (N, num_classes * 4) or (N, 4), where 4
represent tl_x, tl_y, br_x, br_y.
References:
.. [1] https://arxiv.org/abs/1311.2524
Example:
>>> rois = torch.Tensor([[ 0., 0., 1., 1.],
>>> [ 0., 0., 1., 1.],
>>> [ 0., 0., 1., 1.],
>>> [ 5., 5., 5., 5.]])
>>> deltas = torch.Tensor([[ 0., 0., 0., 0.],
>>> [ 1., 1., 1., 1.],
>>> [ 0., 0., 2., -1.],
>>> [ 0.7, -1.9, -0.5, 0.3]])
>>> delta2bbox(rois, deltas, max_shape=(32, 32, 3))
tensor([[0.0000, 0.0000, 1.0000, 1.0000],
[0.1409, 0.1409, 2.8591, 2.8591],
[0.0000, 0.3161, 4.1945, 0.6839],
[5.0000, 5.0000, 5.0000, 5.0000]])
"""
num_bboxes, num_classes = deltas.size(0), deltas.size(1) // 4
if num_bboxes == 0:
return deltas
deltas = deltas.reshape(-1, 4)
means = deltas.new_tensor(means).view(1, -1)
stds = deltas.new_tensor(stds).view(1, -1)
denorm_deltas = deltas * stds + means
dxy = denorm_deltas[:, :2]
dwh = denorm_deltas[:, 2:]
# Compute width/height of each roi
rois_ = rois.repeat(1, num_classes).reshape(-1, 4)
pxy = ((rois_[:, :2] + rois_[:, 2:]) * 0.5)
pwh = (rois_[:, 2:] - rois_[:, :2])
dxy_wh = pwh * dxy
max_ratio = np.abs(np.log(wh_ratio_clip))
if add_ctr_clamp:
dxy_wh = torch.clamp(dxy_wh, max=ctr_clamp, min=-ctr_clamp)
dwh = torch.clamp(dwh, max=max_ratio)
else:
dwh = dwh.clamp(min=-max_ratio, max=max_ratio)
gxy = pxy + dxy_wh
gwh = pwh * dwh.exp()
x1y1 = gxy - (gwh * 0.5)
x2y2 = gxy + (gwh * 0.5)
bboxes = torch.cat([x1y1, x2y2], dim=-1)
if clip_border and max_shape is not None:
bboxes[..., 0::2].clamp_(min=0, max=max_shape[1])
bboxes[..., 1::2].clamp_(min=0, max=max_shape[0])
bboxes = bboxes.reshape(num_bboxes, -1)
return bboxes
def onnx_delta2bbox(rois,
deltas,
means=(0., 0., 0., 0.),
stds=(1., 1., 1., 1.),
max_shape=None,
wh_ratio_clip=16 / 1000,
clip_border=True,
add_ctr_clamp=False,
ctr_clamp=32):
"""Apply deltas to shift/scale base boxes.
Typically the rois are anchor or proposed bounding boxes and the deltas are
network outputs used to shift/scale those boxes.
This is the inverse function of :func:`bbox2delta`.
Args:
rois (Tensor): Boxes to be transformed. Has shape (N, 4) or (B, N, 4)
deltas (Tensor): Encoded offsets with respect to each roi.
Has shape (B, N, num_classes * 4) or (B, N, 4) or
(N, num_classes * 4) or (N, 4). Note N = num_anchors * W * H
when rois is a grid of anchors.Offset encoding follows [1]_.
means (Sequence[float]): Denormalizing means for delta coordinates.
Default (0., 0., 0., 0.).
stds (Sequence[float]): Denormalizing standard deviation for delta
coordinates. Default (1., 1., 1., 1.).
max_shape (Sequence[int] or torch.Tensor or Sequence[
Sequence[int]],optional): Maximum bounds for boxes, specifies
(H, W, C) or (H, W). If rois shape is (B, N, 4), then
the max_shape should be a Sequence[Sequence[int]]
and the length of max_shape should also be B. Default None.
wh_ratio_clip (float): Maximum aspect ratio for boxes.
Default 16 / 1000.
clip_border (bool, optional): Whether clip the objects outside the
border of the image. Default True.
add_ctr_clamp (bool): Whether to add center clamp, when added, the
predicted box is clamped is its center is too far away from
the original anchor's center. Only used by YOLOF. Default False.
ctr_clamp (int): the maximum pixel shift to clamp. Only used by YOLOF.
Default 32.
Returns:
Tensor: Boxes with shape (B, N, num_classes * 4) or (B, N, 4) or
(N, num_classes * 4) or (N, 4), where 4 represent
tl_x, tl_y, br_x, br_y.
References:
.. [1] https://arxiv.org/abs/1311.2524
Example:
>>> rois = torch.Tensor([[ 0., 0., 1., 1.],
>>> [ 0., 0., 1., 1.],
>>> [ 0., 0., 1., 1.],
>>> [ 5., 5., 5., 5.]])
>>> deltas = torch.Tensor([[ 0., 0., 0., 0.],
>>> [ 1., 1., 1., 1.],
>>> [ 0., 0., 2., -1.],
>>> [ 0.7, -1.9, -0.5, 0.3]])
>>> delta2bbox(rois, deltas, max_shape=(32, 32, 3))
tensor([[0.0000, 0.0000, 1.0000, 1.0000],
[0.1409, 0.1409, 2.8591, 2.8591],
[0.0000, 0.3161, 4.1945, 0.6839],
[5.0000, 5.0000, 5.0000, 5.0000]])
"""
means = deltas.new_tensor(means).view(1,
-1).repeat(1,
deltas.size(-1) // 4)
stds = deltas.new_tensor(stds).view(1, -1).repeat(1, deltas.size(-1) // 4)
denorm_deltas = deltas * stds + means
dx = denorm_deltas[..., 0::4]
dy = denorm_deltas[..., 1::4]
dw = denorm_deltas[..., 2::4]
dh = denorm_deltas[..., 3::4]
x1, y1 = rois[..., 0], rois[..., 1]
x2, y2 = rois[..., 2], rois[..., 3]
# Compute center of each roi
px = ((x1 + x2) * 0.5).unsqueeze(-1).expand_as(dx)
py = ((y1 + y2) * 0.5).unsqueeze(-1).expand_as(dy)
# Compute width/height of each roi
pw = (x2 - x1).unsqueeze(-1).expand_as(dw)
ph = (y2 - y1).unsqueeze(-1).expand_as(dh)
dx_width = pw * dx
dy_height = ph * dy
max_ratio = np.abs(np.log(wh_ratio_clip))
if add_ctr_clamp:
dx_width = torch.clamp(dx_width, max=ctr_clamp, min=-ctr_clamp)
dy_height = torch.clamp(dy_height, max=ctr_clamp, min=-ctr_clamp)
dw = torch.clamp(dw, max=max_ratio)
dh = torch.clamp(dh, max=max_ratio)
else:
dw = dw.clamp(min=-max_ratio, max=max_ratio)
dh = dh.clamp(min=-max_ratio, max=max_ratio)
# Use exp(network energy) to enlarge/shrink each roi
gw = pw * dw.exp()
gh = ph * dh.exp()
# Use network energy to shift the center of each roi
gx = px + dx_width
gy = py + dy_height
# Convert center-xy/width/height to top-left, bottom-right
x1 = gx - gw * 0.5
y1 = gy - gh * 0.5
x2 = gx + gw * 0.5
y2 = gy + gh * 0.5
bboxes = torch.stack([x1, y1, x2, y2], dim=-1).view(deltas.size())
if clip_border and max_shape is not None:
# clip bboxes with dynamic `min` and `max` for onnx
if torch.onnx.is_in_onnx_export():
from mmdet.core.export import dynamic_clip_for_onnx
x1, y1, x2, y2 = dynamic_clip_for_onnx(x1, y1, x2, y2, max_shape)
bboxes = torch.stack([x1, y1, x2, y2], dim=-1).view(deltas.size())
return bboxes
if not isinstance(max_shape, torch.Tensor):
max_shape = x1.new_tensor(max_shape)
max_shape = max_shape[..., :2].type_as(x1)
if max_shape.ndim == 2:
assert bboxes.ndim == 3
assert max_shape.size(0) == bboxes.size(0)
min_xy = x1.new_tensor(0)
max_xy = torch.cat(
[max_shape] * (deltas.size(-1) // 2),
dim=-1).flip(-1).unsqueeze(-2)
bboxes = torch.where(bboxes < min_xy, min_xy, bboxes)
bboxes = torch.where(bboxes > max_xy, max_xy, bboxes)
return bboxes
| 15,978 | 39.659033 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/coder/__init__.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from .base_bbox_coder import BaseBBoxCoder
from .bucketing_bbox_coder import BucketingBBoxCoder
from .delta_xywh_bbox_coder import DeltaXYWHBBoxCoder
from .distance_point_bbox_coder import DistancePointBBoxCoder
from .legacy_delta_xywh_bbox_coder import LegacyDeltaXYWHBBoxCoder
from .pseudo_bbox_coder import PseudoBBoxCoder
from .tblr_bbox_coder import TBLRBBoxCoder
from .yolo_bbox_coder import YOLOBBoxCoder
__all__ = [
'BaseBBoxCoder', 'PseudoBBoxCoder', 'DeltaXYWHBBoxCoder',
'LegacyDeltaXYWHBBoxCoder', 'TBLRBBoxCoder', 'YOLOBBoxCoder',
'BucketingBBoxCoder', 'DistancePointBBoxCoder'
]
| 654 | 39.9375 | 66 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/iou_calculators/__init__.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from .builder import build_iou_calculator
from .iou2d_calculator import BboxOverlaps2D, bbox_overlaps
__all__ = ['build_iou_calculator', 'BboxOverlaps2D', 'bbox_overlaps']
| 221 | 36 | 69 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/iou_calculators/builder.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from mmcv.utils import Registry, build_from_cfg
IOU_CALCULATORS = Registry('IoU calculator')
def build_iou_calculator(cfg, default_args=None):
"""Builder of IoU calculator."""
return build_from_cfg(cfg, IOU_CALCULATORS, default_args)
| 293 | 28.4 | 61 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/iou_calculators/iou2d_calculator.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import torch
from .builder import IOU_CALCULATORS
def cast_tensor_type(x, scale=1., dtype=None):
if dtype == 'fp16':
# scale is for preventing overflows
x = (x / scale).half()
return x
def fp16_clamp(x, min=None, max=None):
if not x.is_cuda and x.dtype == torch.float16:
# clamp for cpu float16, tensor fp16 has no clamp implementation
return x.float().clamp(min, max).half()
return x.clamp(min, max)
@IOU_CALCULATORS.register_module()
class BboxOverlaps2D:
"""2D Overlaps (e.g. IoUs, GIoUs) Calculator."""
def __init__(self, scale=1., dtype=None):
self.scale = scale
self.dtype = dtype
def __call__(self, bboxes1, bboxes2, mode='iou', is_aligned=False):
"""Calculate IoU between 2D bboxes.
Args:
bboxes1 (Tensor): bboxes have shape (m, 4) in <x1, y1, x2, y2>
format, or shape (m, 5) in <x1, y1, x2, y2, score> format.
bboxes2 (Tensor): bboxes have shape (m, 4) in <x1, y1, x2, y2>
format, shape (m, 5) in <x1, y1, x2, y2, score> format, or be
empty. If ``is_aligned `` is ``True``, then m and n must be
equal.
mode (str): "iou" (intersection over union), "iof" (intersection
over foreground), or "giou" (generalized intersection over
union).
is_aligned (bool, optional): If True, then m and n must be equal.
Default False.
Returns:
Tensor: shape (m, n) if ``is_aligned `` is False else shape (m,)
"""
assert bboxes1.size(-1) in [0, 4, 5]
assert bboxes2.size(-1) in [0, 4, 5]
if bboxes2.size(-1) == 5:
bboxes2 = bboxes2[..., :4]
if bboxes1.size(-1) == 5:
bboxes1 = bboxes1[..., :4]
if self.dtype == 'fp16':
# change tensor type to save cpu and cuda memory and keep speed
bboxes1 = cast_tensor_type(bboxes1, self.scale, self.dtype)
bboxes2 = cast_tensor_type(bboxes2, self.scale, self.dtype)
overlaps = bbox_overlaps(bboxes1, bboxes2, mode, is_aligned)
if not overlaps.is_cuda and overlaps.dtype == torch.float16:
# resume cpu float32
overlaps = overlaps.float()
return overlaps
return bbox_overlaps(bboxes1, bboxes2, mode, is_aligned)
def __repr__(self):
"""str: a string describing the module"""
repr_str = self.__class__.__name__ + f'(' \
f'scale={self.scale}, dtype={self.dtype})'
return repr_str
def bbox_overlaps(bboxes1, bboxes2, mode='iou', is_aligned=False, eps=1e-6):
"""Calculate overlap between two set of bboxes.
FP16 Contributed by https://github.com/open-mmlab/mmdetection/pull/4889
Note:
Assume bboxes1 is M x 4, bboxes2 is N x 4, when mode is 'iou',
there are some new generated variable when calculating IOU
using bbox_overlaps function:
1) is_aligned is False
area1: M x 1
area2: N x 1
lt: M x N x 2
rb: M x N x 2
wh: M x N x 2
overlap: M x N x 1
union: M x N x 1
ious: M x N x 1
Total memory:
S = (9 x N x M + N + M) * 4 Byte,
When using FP16, we can reduce:
R = (9 x N x M + N + M) * 4 / 2 Byte
R large than (N + M) * 4 * 2 is always true when N and M >= 1.
Obviously, N + M <= N * M < 3 * N * M, when N >=2 and M >=2,
N + 1 < 3 * N, when N or M is 1.
Given M = 40 (ground truth), N = 400000 (three anchor boxes
in per grid, FPN, R-CNNs),
R = 275 MB (one times)
A special case (dense detection), M = 512 (ground truth),
R = 3516 MB = 3.43 GB
When the batch size is B, reduce:
B x R
Therefore, CUDA memory runs out frequently.
Experiments on GeForce RTX 2080Ti (11019 MiB):
| dtype | M | N | Use | Real | Ideal |
|:----:|:----:|:----:|:----:|:----:|:----:|
| FP32 | 512 | 400000 | 8020 MiB | -- | -- |
| FP16 | 512 | 400000 | 4504 MiB | 3516 MiB | 3516 MiB |
| FP32 | 40 | 400000 | 1540 MiB | -- | -- |
| FP16 | 40 | 400000 | 1264 MiB | 276MiB | 275 MiB |
2) is_aligned is True
area1: N x 1
area2: N x 1
lt: N x 2
rb: N x 2
wh: N x 2
overlap: N x 1
union: N x 1
ious: N x 1
Total memory:
S = 11 x N * 4 Byte
When using FP16, we can reduce:
R = 11 x N * 4 / 2 Byte
So do the 'giou' (large than 'iou').
Time-wise, FP16 is generally faster than FP32.
When gpu_assign_thr is not -1, it takes more time on cpu
but not reduce memory.
There, we can reduce half the memory and keep the speed.
If ``is_aligned`` is ``False``, then calculate the overlaps between each
bbox of bboxes1 and bboxes2, otherwise the overlaps between each aligned
pair of bboxes1 and bboxes2.
Args:
bboxes1 (Tensor): shape (B, m, 4) in <x1, y1, x2, y2> format or empty.
bboxes2 (Tensor): shape (B, n, 4) in <x1, y1, x2, y2> format or empty.
B indicates the batch dim, in shape (B1, B2, ..., Bn).
If ``is_aligned`` is ``True``, then m and n must be equal.
mode (str): "iou" (intersection over union), "iof" (intersection over
foreground) or "giou" (generalized intersection over union).
Default "iou".
is_aligned (bool, optional): If True, then m and n must be equal.
Default False.
eps (float, optional): A value added to the denominator for numerical
stability. Default 1e-6.
Returns:
Tensor: shape (m, n) if ``is_aligned`` is False else shape (m,)
Example:
>>> bboxes1 = torch.FloatTensor([
>>> [0, 0, 10, 10],
>>> [10, 10, 20, 20],
>>> [32, 32, 38, 42],
>>> ])
>>> bboxes2 = torch.FloatTensor([
>>> [0, 0, 10, 20],
>>> [0, 10, 10, 19],
>>> [10, 10, 20, 20],
>>> ])
>>> overlaps = bbox_overlaps(bboxes1, bboxes2)
>>> assert overlaps.shape == (3, 3)
>>> overlaps = bbox_overlaps(bboxes1, bboxes2, is_aligned=True)
>>> assert overlaps.shape == (3, )
Example:
>>> empty = torch.empty(0, 4)
>>> nonempty = torch.FloatTensor([[0, 0, 10, 9]])
>>> assert tuple(bbox_overlaps(empty, nonempty).shape) == (0, 1)
>>> assert tuple(bbox_overlaps(nonempty, empty).shape) == (1, 0)
>>> assert tuple(bbox_overlaps(empty, empty).shape) == (0, 0)
"""
assert mode in ['iou', 'iof', 'giou'], f'Unsupported mode {mode}'
# Either the boxes are empty or the length of boxes' last dimension is 4
assert (bboxes1.size(-1) == 4 or bboxes1.size(0) == 0)
assert (bboxes2.size(-1) == 4 or bboxes2.size(0) == 0)
# Batch dim must be the same
# Batch dim: (B1, B2, ... Bn)
assert bboxes1.shape[:-2] == bboxes2.shape[:-2]
batch_shape = bboxes1.shape[:-2]
rows = bboxes1.size(-2)
cols = bboxes2.size(-2)
if is_aligned:
assert rows == cols
if rows * cols == 0:
if is_aligned:
return bboxes1.new(batch_shape + (rows, ))
else:
return bboxes1.new(batch_shape + (rows, cols))
area1 = (bboxes1[..., 2] - bboxes1[..., 0]) * (
bboxes1[..., 3] - bboxes1[..., 1])
area2 = (bboxes2[..., 2] - bboxes2[..., 0]) * (
bboxes2[..., 3] - bboxes2[..., 1])
if is_aligned:
lt = torch.max(bboxes1[..., :2], bboxes2[..., :2]) # [B, rows, 2]
rb = torch.min(bboxes1[..., 2:], bboxes2[..., 2:]) # [B, rows, 2]
wh = fp16_clamp(rb - lt, min=0)
overlap = wh[..., 0] * wh[..., 1]
if mode in ['iou', 'giou']:
union = area1 + area2 - overlap
else:
union = area1
if mode == 'giou':
enclosed_lt = torch.min(bboxes1[..., :2], bboxes2[..., :2])
enclosed_rb = torch.max(bboxes1[..., 2:], bboxes2[..., 2:])
else:
lt = torch.max(bboxes1[..., :, None, :2],
bboxes2[..., None, :, :2]) # [B, rows, cols, 2]
rb = torch.min(bboxes1[..., :, None, 2:],
bboxes2[..., None, :, 2:]) # [B, rows, cols, 2]
wh = fp16_clamp(rb - lt, min=0)
overlap = wh[..., 0] * wh[..., 1]
if mode in ['iou', 'giou']:
union = area1[..., None] + area2[..., None, :] - overlap
else:
union = area1[..., None]
if mode == 'giou':
enclosed_lt = torch.min(bboxes1[..., :, None, :2],
bboxes2[..., None, :, :2])
enclosed_rb = torch.max(bboxes1[..., :, None, 2:],
bboxes2[..., None, :, 2:])
eps = union.new_tensor([eps])
union = torch.max(union, eps)
ious = overlap / union
if mode in ['iou', 'iof']:
return ious
# calculate gious
enclose_wh = fp16_clamp(enclosed_rb - enclosed_lt, min=0)
enclose_area = enclose_wh[..., 0] * enclose_wh[..., 1]
enclose_area = torch.max(enclose_area, eps)
gious = ious - (enclose_area - union) / enclose_area
return gious
| 9,678 | 35.942748 | 78 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/samplers/instance_balanced_pos_sampler.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import numpy as np
import torch
from ..builder import BBOX_SAMPLERS
from .random_sampler import RandomSampler
@BBOX_SAMPLERS.register_module()
class InstanceBalancedPosSampler(RandomSampler):
"""Instance balanced sampler that samples equal number of positive samples
for each instance."""
def _sample_pos(self, assign_result, num_expected, **kwargs):
"""Sample positive boxes.
Args:
assign_result (:obj:`AssignResult`): The assigned results of boxes.
num_expected (int): The number of expected positive samples
Returns:
Tensor or ndarray: sampled indices.
"""
pos_inds = torch.nonzero(assign_result.gt_inds > 0, as_tuple=False)
if pos_inds.numel() != 0:
pos_inds = pos_inds.squeeze(1)
if pos_inds.numel() <= num_expected:
return pos_inds
else:
unique_gt_inds = assign_result.gt_inds[pos_inds].unique()
num_gts = len(unique_gt_inds)
num_per_gt = int(round(num_expected / float(num_gts)) + 1)
sampled_inds = []
for i in unique_gt_inds:
inds = torch.nonzero(
assign_result.gt_inds == i.item(), as_tuple=False)
if inds.numel() != 0:
inds = inds.squeeze(1)
else:
continue
if len(inds) > num_per_gt:
inds = self.random_choice(inds, num_per_gt)
sampled_inds.append(inds)
sampled_inds = torch.cat(sampled_inds)
if len(sampled_inds) < num_expected:
num_extra = num_expected - len(sampled_inds)
extra_inds = np.array(
list(set(pos_inds.cpu()) - set(sampled_inds.cpu())))
if len(extra_inds) > num_extra:
extra_inds = self.random_choice(extra_inds, num_extra)
extra_inds = torch.from_numpy(extra_inds).to(
assign_result.gt_inds.device).long()
sampled_inds = torch.cat([sampled_inds, extra_inds])
elif len(sampled_inds) > num_expected:
sampled_inds = self.random_choice(sampled_inds, num_expected)
return sampled_inds
| 2,319 | 39.701754 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/samplers/combined_sampler.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import BBOX_SAMPLERS, build_sampler
from .base_sampler import BaseSampler
@BBOX_SAMPLERS.register_module()
class CombinedSampler(BaseSampler):
"""A sampler that combines positive sampler and negative sampler."""
def __init__(self, pos_sampler, neg_sampler, **kwargs):
super(CombinedSampler, self).__init__(**kwargs)
self.pos_sampler = build_sampler(pos_sampler, **kwargs)
self.neg_sampler = build_sampler(neg_sampler, **kwargs)
def _sample_pos(self, **kwargs):
"""Sample positive samples."""
raise NotImplementedError
def _sample_neg(self, **kwargs):
"""Sample negative samples."""
raise NotImplementedError
| 748 | 33.045455 | 72 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/samplers/base_sampler.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from abc import ABCMeta, abstractmethod
import torch
from .sampling_result import SamplingResult
class BaseSampler(metaclass=ABCMeta):
"""Base class of samplers."""
def __init__(self,
num,
pos_fraction,
neg_pos_ub=-1,
add_gt_as_proposals=True,
**kwargs):
self.num = num
self.pos_fraction = pos_fraction
self.neg_pos_ub = neg_pos_ub
self.add_gt_as_proposals = add_gt_as_proposals
self.pos_sampler = self
self.neg_sampler = self
@abstractmethod
def _sample_pos(self, assign_result, num_expected, **kwargs):
"""Sample positive samples."""
pass
@abstractmethod
def _sample_neg(self, assign_result, num_expected, **kwargs):
"""Sample negative samples."""
pass
def sample(self,
assign_result,
bboxes,
gt_bboxes,
gt_labels=None,
**kwargs):
"""Sample positive and negative bboxes.
This is a simple implementation of bbox sampling given candidates,
assigning results and ground truth bboxes.
Args:
assign_result (:obj:`AssignResult`): Bbox assigning results.
bboxes (Tensor): Boxes to be sampled from.
gt_bboxes (Tensor): Ground truth bboxes.
gt_labels (Tensor, optional): Class labels of ground truth bboxes.
Returns:
:obj:`SamplingResult`: Sampling result.
Example:
>>> from mmdet.core.bbox import RandomSampler
>>> from mmdet.core.bbox import AssignResult
>>> from mmdet.core.bbox.demodata import ensure_rng, random_boxes
>>> rng = ensure_rng(None)
>>> assign_result = AssignResult.random(rng=rng)
>>> bboxes = random_boxes(assign_result.num_preds, rng=rng)
>>> gt_bboxes = random_boxes(assign_result.num_gts, rng=rng)
>>> gt_labels = None
>>> self = RandomSampler(num=32, pos_fraction=0.5, neg_pos_ub=-1,
>>> add_gt_as_proposals=False)
>>> self = self.sample(assign_result, bboxes, gt_bboxes, gt_labels)
"""
if len(bboxes.shape) < 2:
bboxes = bboxes[None, :]
bboxes = bboxes[:, :4]
gt_flags = bboxes.new_zeros((bboxes.shape[0], ), dtype=torch.uint8)
if self.add_gt_as_proposals and len(gt_bboxes) > 0:
if gt_labels is None:
raise ValueError(
'gt_labels must be given when add_gt_as_proposals is True')
bboxes = torch.cat([gt_bboxes, bboxes], dim=0)
assign_result.add_gt_(gt_labels)
gt_ones = bboxes.new_ones(gt_bboxes.shape[0], dtype=torch.uint8)
gt_flags = torch.cat([gt_ones, gt_flags])
num_expected_pos = int(self.num * self.pos_fraction)
pos_inds = self.pos_sampler._sample_pos(
assign_result, num_expected_pos, bboxes=bboxes, **kwargs)
# We found that sampled indices have duplicated items occasionally.
# (may be a bug of PyTorch)
pos_inds = pos_inds.unique()
num_sampled_pos = pos_inds.numel()
num_expected_neg = self.num - num_sampled_pos
if self.neg_pos_ub >= 0:
_pos = max(1, num_sampled_pos)
neg_upper_bound = int(self.neg_pos_ub * _pos)
if num_expected_neg > neg_upper_bound:
num_expected_neg = neg_upper_bound
neg_inds = self.neg_sampler._sample_neg(
assign_result, num_expected_neg, bboxes=bboxes, **kwargs)
neg_inds = neg_inds.unique()
sampling_result = SamplingResult(pos_inds, neg_inds, bboxes, gt_bboxes,
assign_result, gt_flags)
return sampling_result
| 3,920 | 37.067961 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/samplers/random_sampler.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import torch
from ..builder import BBOX_SAMPLERS
from .base_sampler import BaseSampler
@BBOX_SAMPLERS.register_module()
class RandomSampler(BaseSampler):
"""Random sampler.
Args:
num (int): Number of samples
pos_fraction (float): Fraction of positive samples
neg_pos_up (int, optional): Upper bound number of negative and
positive samples. Defaults to -1.
add_gt_as_proposals (bool, optional): Whether to add ground truth
boxes as proposals. Defaults to True.
"""
def __init__(self,
num,
pos_fraction,
neg_pos_ub=-1,
add_gt_as_proposals=True,
**kwargs):
from mmdet.core.bbox import demodata
super(RandomSampler, self).__init__(num, pos_fraction, neg_pos_ub,
add_gt_as_proposals)
self.rng = demodata.ensure_rng(kwargs.get('rng', None))
def random_choice(self, gallery, num):
"""Random select some elements from the gallery.
If `gallery` is a Tensor, the returned indices will be a Tensor;
If `gallery` is a ndarray or list, the returned indices will be a
ndarray.
Args:
gallery (Tensor | ndarray | list): indices pool.
num (int): expected sample num.
Returns:
Tensor or ndarray: sampled indices.
"""
assert len(gallery) >= num
is_tensor = isinstance(gallery, torch.Tensor)
if not is_tensor:
if torch.cuda.is_available():
device = torch.cuda.current_device()
else:
device = 'cpu'
gallery = torch.tensor(gallery, dtype=torch.long, device=device)
# This is a temporary fix. We can revert the following code
# when PyTorch fixes the abnormal return of torch.randperm.
# See: https://github.com/open-mmlab/mmdetection/pull/5014
perm = torch.randperm(gallery.numel())[:num].to(device=gallery.device)
rand_inds = gallery[perm]
if not is_tensor:
rand_inds = rand_inds.cpu().numpy()
return rand_inds
def _sample_pos(self, assign_result, num_expected, **kwargs):
"""Randomly sample some positive samples."""
pos_inds = torch.nonzero(assign_result.gt_inds > 0, as_tuple=False)
if pos_inds.numel() != 0:
pos_inds = pos_inds.squeeze(1)
if pos_inds.numel() <= num_expected:
return pos_inds
else:
return self.random_choice(pos_inds, num_expected)
def _sample_neg(self, assign_result, num_expected, **kwargs):
"""Randomly sample some negative samples."""
neg_inds = torch.nonzero(assign_result.gt_inds == 0, as_tuple=False)
if neg_inds.numel() != 0:
neg_inds = neg_inds.squeeze(1)
if len(neg_inds) <= num_expected:
return neg_inds
else:
return self.random_choice(neg_inds, num_expected)
| 3,071 | 36.012048 | 78 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/samplers/ohem_sampler.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import torch
from ..builder import BBOX_SAMPLERS
from ..transforms import bbox2roi
from .base_sampler import BaseSampler
@BBOX_SAMPLERS.register_module()
class OHEMSampler(BaseSampler):
r"""Online Hard Example Mining Sampler described in `Training Region-based
Object Detectors with Online Hard Example Mining
<https://arxiv.org/abs/1604.03540>`_.
"""
def __init__(self,
num,
pos_fraction,
context,
neg_pos_ub=-1,
add_gt_as_proposals=True,
loss_key='loss_cls',
**kwargs):
super(OHEMSampler, self).__init__(num, pos_fraction, neg_pos_ub,
add_gt_as_proposals)
self.context = context
if not hasattr(self.context, 'num_stages'):
self.bbox_head = self.context.bbox_head
else:
self.bbox_head = self.context.bbox_head[self.context.current_stage]
self.loss_key = loss_key
def hard_mining(self, inds, num_expected, bboxes, labels, feats):
with torch.no_grad():
rois = bbox2roi([bboxes])
if not hasattr(self.context, 'num_stages'):
bbox_results = self.context._bbox_forward(feats, rois)
else:
bbox_results = self.context._bbox_forward(
self.context.current_stage, feats, rois)
cls_score = bbox_results['cls_score']
loss = self.bbox_head.loss(
cls_score=cls_score,
bbox_pred=None,
rois=rois,
labels=labels,
label_weights=cls_score.new_ones(cls_score.size(0)),
bbox_targets=None,
bbox_weights=None,
reduction_override='none')[self.loss_key]
_, topk_loss_inds = loss.topk(num_expected)
return inds[topk_loss_inds]
def _sample_pos(self,
assign_result,
num_expected,
bboxes=None,
feats=None,
**kwargs):
"""Sample positive boxes.
Args:
assign_result (:obj:`AssignResult`): Assigned results
num_expected (int): Number of expected positive samples
bboxes (torch.Tensor, optional): Boxes. Defaults to None.
feats (list[torch.Tensor], optional): Multi-level features.
Defaults to None.
Returns:
torch.Tensor: Indices of positive samples
"""
# Sample some hard positive samples
pos_inds = torch.nonzero(assign_result.gt_inds > 0, as_tuple=False)
if pos_inds.numel() != 0:
pos_inds = pos_inds.squeeze(1)
if pos_inds.numel() <= num_expected:
return pos_inds
else:
return self.hard_mining(pos_inds, num_expected, bboxes[pos_inds],
assign_result.labels[pos_inds], feats)
def _sample_neg(self,
assign_result,
num_expected,
bboxes=None,
feats=None,
**kwargs):
"""Sample negative boxes.
Args:
assign_result (:obj:`AssignResult`): Assigned results
num_expected (int): Number of expected negative samples
bboxes (torch.Tensor, optional): Boxes. Defaults to None.
feats (list[torch.Tensor], optional): Multi-level features.
Defaults to None.
Returns:
torch.Tensor: Indices of negative samples
"""
# Sample some hard negative samples
neg_inds = torch.nonzero(assign_result.gt_inds == 0, as_tuple=False)
if neg_inds.numel() != 0:
neg_inds = neg_inds.squeeze(1)
if len(neg_inds) <= num_expected:
return neg_inds
else:
neg_labels = assign_result.labels.new_empty(
neg_inds.size(0)).fill_(self.bbox_head.num_classes)
return self.hard_mining(neg_inds, num_expected, bboxes[neg_inds],
neg_labels, feats)
| 4,221 | 36.696429 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/samplers/iou_balanced_neg_sampler.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import numpy as np
import torch
from ..builder import BBOX_SAMPLERS
from .random_sampler import RandomSampler
@BBOX_SAMPLERS.register_module()
class IoUBalancedNegSampler(RandomSampler):
"""IoU Balanced Sampling.
arXiv: https://arxiv.org/pdf/1904.02701.pdf (CVPR 2019)
Sampling proposals according to their IoU. `floor_fraction` of needed RoIs
are sampled from proposals whose IoU are lower than `floor_thr` randomly.
The others are sampled from proposals whose IoU are higher than
`floor_thr`. These proposals are sampled from some bins evenly, which are
split by `num_bins` via IoU evenly.
Args:
num (int): number of proposals.
pos_fraction (float): fraction of positive proposals.
floor_thr (float): threshold (minimum) IoU for IoU balanced sampling,
set to -1 if all using IoU balanced sampling.
floor_fraction (float): sampling fraction of proposals under floor_thr.
num_bins (int): number of bins in IoU balanced sampling.
"""
def __init__(self,
num,
pos_fraction,
floor_thr=-1,
floor_fraction=0,
num_bins=3,
**kwargs):
super(IoUBalancedNegSampler, self).__init__(num, pos_fraction,
**kwargs)
assert floor_thr >= 0 or floor_thr == -1
assert 0 <= floor_fraction <= 1
assert num_bins >= 1
self.floor_thr = floor_thr
self.floor_fraction = floor_fraction
self.num_bins = num_bins
def sample_via_interval(self, max_overlaps, full_set, num_expected):
"""Sample according to the iou interval.
Args:
max_overlaps (torch.Tensor): IoU between bounding boxes and ground
truth boxes.
full_set (set(int)): A full set of indices of boxes。
num_expected (int): Number of expected samples。
Returns:
np.ndarray: Indices of samples
"""
max_iou = max_overlaps.max()
iou_interval = (max_iou - self.floor_thr) / self.num_bins
per_num_expected = int(num_expected / self.num_bins)
sampled_inds = []
for i in range(self.num_bins):
start_iou = self.floor_thr + i * iou_interval
end_iou = self.floor_thr + (i + 1) * iou_interval
tmp_set = set(
np.where(
np.logical_and(max_overlaps >= start_iou,
max_overlaps < end_iou))[0])
tmp_inds = list(tmp_set & full_set)
if len(tmp_inds) > per_num_expected:
tmp_sampled_set = self.random_choice(tmp_inds,
per_num_expected)
else:
tmp_sampled_set = np.array(tmp_inds, dtype=np.int)
sampled_inds.append(tmp_sampled_set)
sampled_inds = np.concatenate(sampled_inds)
if len(sampled_inds) < num_expected:
num_extra = num_expected - len(sampled_inds)
extra_inds = np.array(list(full_set - set(sampled_inds)))
if len(extra_inds) > num_extra:
extra_inds = self.random_choice(extra_inds, num_extra)
sampled_inds = np.concatenate([sampled_inds, extra_inds])
return sampled_inds
def _sample_neg(self, assign_result, num_expected, **kwargs):
"""Sample negative boxes.
Args:
assign_result (:obj:`AssignResult`): The assigned results of boxes.
num_expected (int): The number of expected negative samples
Returns:
Tensor or ndarray: sampled indices.
"""
neg_inds = torch.nonzero(assign_result.gt_inds == 0, as_tuple=False)
if neg_inds.numel() != 0:
neg_inds = neg_inds.squeeze(1)
if len(neg_inds) <= num_expected:
return neg_inds
else:
max_overlaps = assign_result.max_overlaps.cpu().numpy()
# balance sampling for negative samples
neg_set = set(neg_inds.cpu().numpy())
if self.floor_thr > 0:
floor_set = set(
np.where(
np.logical_and(max_overlaps >= 0,
max_overlaps < self.floor_thr))[0])
iou_sampling_set = set(
np.where(max_overlaps >= self.floor_thr)[0])
elif self.floor_thr == 0:
floor_set = set(np.where(max_overlaps == 0)[0])
iou_sampling_set = set(
np.where(max_overlaps > self.floor_thr)[0])
else:
floor_set = set()
iou_sampling_set = set(
np.where(max_overlaps > self.floor_thr)[0])
# for sampling interval calculation
self.floor_thr = 0
floor_neg_inds = list(floor_set & neg_set)
iou_sampling_neg_inds = list(iou_sampling_set & neg_set)
num_expected_iou_sampling = int(num_expected *
(1 - self.floor_fraction))
if len(iou_sampling_neg_inds) > num_expected_iou_sampling:
if self.num_bins >= 2:
iou_sampled_inds = self.sample_via_interval(
max_overlaps, set(iou_sampling_neg_inds),
num_expected_iou_sampling)
else:
iou_sampled_inds = self.random_choice(
iou_sampling_neg_inds, num_expected_iou_sampling)
else:
iou_sampled_inds = np.array(
iou_sampling_neg_inds, dtype=np.int)
num_expected_floor = num_expected - len(iou_sampled_inds)
if len(floor_neg_inds) > num_expected_floor:
sampled_floor_inds = self.random_choice(
floor_neg_inds, num_expected_floor)
else:
sampled_floor_inds = np.array(floor_neg_inds, dtype=np.int)
sampled_inds = np.concatenate(
(sampled_floor_inds, iou_sampled_inds))
if len(sampled_inds) < num_expected:
num_extra = num_expected - len(sampled_inds)
extra_inds = np.array(list(neg_set - set(sampled_inds)))
if len(extra_inds) > num_extra:
extra_inds = self.random_choice(extra_inds, num_extra)
sampled_inds = np.concatenate((sampled_inds, extra_inds))
sampled_inds = torch.from_numpy(sampled_inds).long().to(
assign_result.gt_inds.device)
return sampled_inds
| 6,740 | 41.396226 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/samplers/score_hlr_sampler.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import torch
from mmcv.ops import nms_match
from ..builder import BBOX_SAMPLERS
from ..transforms import bbox2roi
from .base_sampler import BaseSampler
from .sampling_result import SamplingResult
@BBOX_SAMPLERS.register_module()
class ScoreHLRSampler(BaseSampler):
r"""Importance-based Sample Reweighting (ISR_N), described in `Prime Sample
Attention in Object Detection <https://arxiv.org/abs/1904.04821>`_.
Score hierarchical local rank (HLR) differentiates with RandomSampler in
negative part. It firstly computes Score-HLR in a two-step way,
then linearly maps score hlr to the loss weights.
Args:
num (int): Total number of sampled RoIs.
pos_fraction (float): Fraction of positive samples.
context (:class:`BaseRoIHead`): RoI head that the sampler belongs to.
neg_pos_ub (int): Upper bound of the ratio of num negative to num
positive, -1 means no upper bound.
add_gt_as_proposals (bool): Whether to add ground truth as proposals.
k (float): Power of the non-linear mapping.
bias (float): Shift of the non-linear mapping.
score_thr (float): Minimum score that a negative sample is to be
considered as valid bbox.
"""
def __init__(self,
num,
pos_fraction,
context,
neg_pos_ub=-1,
add_gt_as_proposals=True,
k=0.5,
bias=0,
score_thr=0.05,
iou_thr=0.5,
**kwargs):
super().__init__(num, pos_fraction, neg_pos_ub, add_gt_as_proposals)
self.k = k
self.bias = bias
self.score_thr = score_thr
self.iou_thr = iou_thr
self.context = context
# context of cascade detectors is a list, so distinguish them here.
if not hasattr(context, 'num_stages'):
self.bbox_roi_extractor = context.bbox_roi_extractor
self.bbox_head = context.bbox_head
self.with_shared_head = context.with_shared_head
if self.with_shared_head:
self.shared_head = context.shared_head
else:
self.bbox_roi_extractor = context.bbox_roi_extractor[
context.current_stage]
self.bbox_head = context.bbox_head[context.current_stage]
@staticmethod
def random_choice(gallery, num):
"""Randomly select some elements from the gallery.
If `gallery` is a Tensor, the returned indices will be a Tensor;
If `gallery` is a ndarray or list, the returned indices will be a
ndarray.
Args:
gallery (Tensor | ndarray | list): indices pool.
num (int): expected sample num.
Returns:
Tensor or ndarray: sampled indices.
"""
assert len(gallery) >= num
is_tensor = isinstance(gallery, torch.Tensor)
if not is_tensor:
if torch.cuda.is_available():
device = torch.cuda.current_device()
else:
device = 'cpu'
gallery = torch.tensor(gallery, dtype=torch.long, device=device)
perm = torch.randperm(gallery.numel(), device=gallery.device)[:num]
rand_inds = gallery[perm]
if not is_tensor:
rand_inds = rand_inds.cpu().numpy()
return rand_inds
def _sample_pos(self, assign_result, num_expected, **kwargs):
"""Randomly sample some positive samples."""
pos_inds = torch.nonzero(assign_result.gt_inds > 0).flatten()
if pos_inds.numel() <= num_expected:
return pos_inds
else:
return self.random_choice(pos_inds, num_expected)
def _sample_neg(self,
assign_result,
num_expected,
bboxes,
feats=None,
img_meta=None,
**kwargs):
"""Sample negative samples.
Score-HLR sampler is done in the following steps:
1. Take the maximum positive score prediction of each negative samples
as s_i.
2. Filter out negative samples whose s_i <= score_thr, the left samples
are called valid samples.
3. Use NMS-Match to divide valid samples into different groups,
samples in the same group will greatly overlap with each other
4. Rank the matched samples in two-steps to get Score-HLR.
(1) In the same group, rank samples with their scores.
(2) In the same score rank across different groups,
rank samples with their scores again.
5. Linearly map Score-HLR to the final label weights.
Args:
assign_result (:obj:`AssignResult`): result of assigner.
num_expected (int): Expected number of samples.
bboxes (Tensor): bbox to be sampled.
feats (Tensor): Features come from FPN.
img_meta (dict): Meta information dictionary.
"""
neg_inds = torch.nonzero(assign_result.gt_inds == 0).flatten()
num_neg = neg_inds.size(0)
if num_neg == 0:
return neg_inds, None
with torch.no_grad():
neg_bboxes = bboxes[neg_inds]
neg_rois = bbox2roi([neg_bboxes])
bbox_result = self.context._bbox_forward(feats, neg_rois)
cls_score, bbox_pred = bbox_result['cls_score'], bbox_result[
'bbox_pred']
ori_loss = self.bbox_head.loss(
cls_score=cls_score,
bbox_pred=None,
rois=None,
labels=neg_inds.new_full((num_neg, ),
self.bbox_head.num_classes),
label_weights=cls_score.new_ones(num_neg),
bbox_targets=None,
bbox_weights=None,
reduction_override='none')['loss_cls']
# filter out samples with the max score lower than score_thr
max_score, argmax_score = cls_score.softmax(-1)[:, :-1].max(-1)
valid_inds = (max_score > self.score_thr).nonzero().view(-1)
invalid_inds = (max_score <= self.score_thr).nonzero().view(-1)
num_valid = valid_inds.size(0)
num_invalid = invalid_inds.size(0)
num_expected = min(num_neg, num_expected)
num_hlr = min(num_valid, num_expected)
num_rand = num_expected - num_hlr
if num_valid > 0:
valid_rois = neg_rois[valid_inds]
valid_max_score = max_score[valid_inds]
valid_argmax_score = argmax_score[valid_inds]
valid_bbox_pred = bbox_pred[valid_inds]
# valid_bbox_pred shape: [num_valid, #num_classes, 4]
valid_bbox_pred = valid_bbox_pred.view(
valid_bbox_pred.size(0), -1, 4)
selected_bbox_pred = valid_bbox_pred[range(num_valid),
valid_argmax_score]
pred_bboxes = self.bbox_head.bbox_coder.decode(
valid_rois[:, 1:], selected_bbox_pred)
pred_bboxes_with_score = torch.cat(
[pred_bboxes, valid_max_score[:, None]], -1)
group = nms_match(pred_bboxes_with_score, self.iou_thr)
# imp: importance
imp = cls_score.new_zeros(num_valid)
for g in group:
g_score = valid_max_score[g]
# g_score has already sorted
rank = g_score.new_tensor(range(g_score.size(0)))
imp[g] = num_valid - rank + g_score
_, imp_rank_inds = imp.sort(descending=True)
_, imp_rank = imp_rank_inds.sort()
hlr_inds = imp_rank_inds[:num_expected]
if num_rand > 0:
rand_inds = torch.randperm(num_invalid)[:num_rand]
select_inds = torch.cat(
[valid_inds[hlr_inds], invalid_inds[rand_inds]])
else:
select_inds = valid_inds[hlr_inds]
neg_label_weights = cls_score.new_ones(num_expected)
up_bound = max(num_expected, num_valid)
imp_weights = (up_bound -
imp_rank[hlr_inds].float()) / up_bound
neg_label_weights[:num_hlr] = imp_weights
neg_label_weights[num_hlr:] = imp_weights.min()
neg_label_weights = (self.bias +
(1 - self.bias) * neg_label_weights).pow(
self.k)
ori_selected_loss = ori_loss[select_inds]
new_loss = ori_selected_loss * neg_label_weights
norm_ratio = ori_selected_loss.sum() / new_loss.sum()
neg_label_weights *= norm_ratio
else:
neg_label_weights = cls_score.new_ones(num_expected)
select_inds = torch.randperm(num_neg)[:num_expected]
return neg_inds[select_inds], neg_label_weights
def sample(self,
assign_result,
bboxes,
gt_bboxes,
gt_labels=None,
img_meta=None,
**kwargs):
"""Sample positive and negative bboxes.
This is a simple implementation of bbox sampling given candidates,
assigning results and ground truth bboxes.
Args:
assign_result (:obj:`AssignResult`): Bbox assigning results.
bboxes (Tensor): Boxes to be sampled from.
gt_bboxes (Tensor): Ground truth bboxes.
gt_labels (Tensor, optional): Class labels of ground truth bboxes.
Returns:
tuple[:obj:`SamplingResult`, Tensor]: Sampling result and negative
label weights.
"""
bboxes = bboxes[:, :4]
gt_flags = bboxes.new_zeros((bboxes.shape[0], ), dtype=torch.uint8)
if self.add_gt_as_proposals:
bboxes = torch.cat([gt_bboxes, bboxes], dim=0)
assign_result.add_gt_(gt_labels)
gt_ones = bboxes.new_ones(gt_bboxes.shape[0], dtype=torch.uint8)
gt_flags = torch.cat([gt_ones, gt_flags])
num_expected_pos = int(self.num * self.pos_fraction)
pos_inds = self.pos_sampler._sample_pos(
assign_result, num_expected_pos, bboxes=bboxes, **kwargs)
num_sampled_pos = pos_inds.numel()
num_expected_neg = self.num - num_sampled_pos
if self.neg_pos_ub >= 0:
_pos = max(1, num_sampled_pos)
neg_upper_bound = int(self.neg_pos_ub * _pos)
if num_expected_neg > neg_upper_bound:
num_expected_neg = neg_upper_bound
neg_inds, neg_label_weights = self.neg_sampler._sample_neg(
assign_result,
num_expected_neg,
bboxes,
img_meta=img_meta,
**kwargs)
return SamplingResult(pos_inds, neg_inds, bboxes, gt_bboxes,
assign_result, gt_flags), neg_label_weights
| 11,235 | 41.240602 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/samplers/__init__.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from .base_sampler import BaseSampler
from .combined_sampler import CombinedSampler
from .instance_balanced_pos_sampler import InstanceBalancedPosSampler
from .iou_balanced_neg_sampler import IoUBalancedNegSampler
from .ohem_sampler import OHEMSampler
from .pseudo_sampler import PseudoSampler
from .random_sampler import RandomSampler
from .sampling_result import SamplingResult
from .score_hlr_sampler import ScoreHLRSampler
__all__ = [
'BaseSampler', 'PseudoSampler', 'RandomSampler',
'InstanceBalancedPosSampler', 'IoUBalancedNegSampler', 'CombinedSampler',
'OHEMSampler', 'SamplingResult', 'ScoreHLRSampler'
]
| 676 | 38.823529 | 77 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/samplers/sampling_result.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import torch
from mmdet.utils import util_mixins
class SamplingResult(util_mixins.NiceRepr):
"""Bbox sampling result.
Example:
>>> # xdoctest: +IGNORE_WANT
>>> from mmdet.core.bbox.samplers.sampling_result import * # NOQA
>>> self = SamplingResult.random(rng=10)
>>> print(f'self = {self}')
self = <SamplingResult({
'neg_bboxes': torch.Size([12, 4]),
'neg_inds': tensor([ 0, 1, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12]),
'num_gts': 4,
'pos_assigned_gt_inds': tensor([], dtype=torch.int64),
'pos_bboxes': torch.Size([0, 4]),
'pos_inds': tensor([], dtype=torch.int64),
'pos_is_gt': tensor([], dtype=torch.uint8)
})>
"""
def __init__(self, pos_inds, neg_inds, bboxes, gt_bboxes, assign_result,
gt_flags):
self.pos_inds = pos_inds
self.neg_inds = neg_inds
self.pos_bboxes = bboxes[pos_inds]
self.neg_bboxes = bboxes[neg_inds]
self.pos_is_gt = gt_flags[pos_inds]
self.num_gts = gt_bboxes.shape[0]
self.pos_assigned_gt_inds = assign_result.gt_inds[pos_inds] - 1
if gt_bboxes.numel() == 0:
# hack for index error case
assert self.pos_assigned_gt_inds.numel() == 0
self.pos_gt_bboxes = torch.empty_like(gt_bboxes).view(-1, 4)
else:
if len(gt_bboxes.shape) < 2:
gt_bboxes = gt_bboxes.view(-1, 4)
self.pos_gt_bboxes = gt_bboxes[self.pos_assigned_gt_inds, :]
if assign_result.labels is not None:
self.pos_gt_labels = assign_result.labels[pos_inds]
else:
self.pos_gt_labels = None
@property
def bboxes(self):
"""torch.Tensor: concatenated positive and negative boxes"""
return torch.cat([self.pos_bboxes, self.neg_bboxes])
def to(self, device):
"""Change the device of the data inplace.
Example:
>>> self = SamplingResult.random()
>>> print(f'self = {self.to(None)}')
>>> # xdoctest: +REQUIRES(--gpu)
>>> print(f'self = {self.to(0)}')
"""
_dict = self.__dict__
for key, value in _dict.items():
if isinstance(value, torch.Tensor):
_dict[key] = value.to(device)
return self
def __nice__(self):
data = self.info.copy()
data['pos_bboxes'] = data.pop('pos_bboxes').shape
data['neg_bboxes'] = data.pop('neg_bboxes').shape
parts = [f"'{k}': {v!r}" for k, v in sorted(data.items())]
body = ' ' + ',\n '.join(parts)
return '{\n' + body + '\n}'
@property
def info(self):
"""Returns a dictionary of info about the object."""
return {
'pos_inds': self.pos_inds,
'neg_inds': self.neg_inds,
'pos_bboxes': self.pos_bboxes,
'neg_bboxes': self.neg_bboxes,
'pos_is_gt': self.pos_is_gt,
'num_gts': self.num_gts,
'pos_assigned_gt_inds': self.pos_assigned_gt_inds,
}
@classmethod
def random(cls, rng=None, **kwargs):
"""
Args:
rng (None | int | numpy.random.RandomState): seed or state.
kwargs (keyword arguments):
- num_preds: number of predicted boxes
- num_gts: number of true boxes
- p_ignore (float): probability of a predicted box assigned to \
an ignored truth.
- p_assigned (float): probability of a predicted box not being \
assigned.
- p_use_label (float | bool): with labels or not.
Returns:
:obj:`SamplingResult`: Randomly generated sampling result.
Example:
>>> from mmdet.core.bbox.samplers.sampling_result import * # NOQA
>>> self = SamplingResult.random()
>>> print(self.__dict__)
"""
from mmdet.core.bbox.samplers.random_sampler import RandomSampler
from mmdet.core.bbox.assigners.assign_result import AssignResult
from mmdet.core.bbox import demodata
rng = demodata.ensure_rng(rng)
# make probabalistic?
num = 32
pos_fraction = 0.5
neg_pos_ub = -1
assign_result = AssignResult.random(rng=rng, **kwargs)
# Note we could just compute an assignment
bboxes = demodata.random_boxes(assign_result.num_preds, rng=rng)
gt_bboxes = demodata.random_boxes(assign_result.num_gts, rng=rng)
if rng.rand() > 0.2:
# sometimes algorithms squeeze their data, be robust to that
gt_bboxes = gt_bboxes.squeeze()
bboxes = bboxes.squeeze()
if assign_result.labels is None:
gt_labels = None
else:
gt_labels = None # todo
if gt_labels is None:
add_gt_as_proposals = False
else:
add_gt_as_proposals = True # make probabalistic?
sampler = RandomSampler(
num,
pos_fraction,
neg_pos_ub=neg_pos_ub,
add_gt_as_proposals=add_gt_as_proposals,
rng=rng)
self = sampler.sample(assign_result, bboxes, gt_bboxes, gt_labels)
return self
| 5,382 | 33.954545 | 81 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/bbox/samplers/pseudo_sampler.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import torch
from ..builder import BBOX_SAMPLERS
from .base_sampler import BaseSampler
from .sampling_result import SamplingResult
@BBOX_SAMPLERS.register_module()
class PseudoSampler(BaseSampler):
"""A pseudo sampler that does not do sampling actually."""
def __init__(self, **kwargs):
pass
def _sample_pos(self, **kwargs):
"""Sample positive samples."""
raise NotImplementedError
def _sample_neg(self, **kwargs):
"""Sample negative samples."""
raise NotImplementedError
def sample(self, assign_result, bboxes, gt_bboxes, *args, **kwargs):
"""Directly returns the positive and negative indices of samples.
Args:
assign_result (:obj:`AssignResult`): Assigned results
bboxes (torch.Tensor): Bounding boxes
gt_bboxes (torch.Tensor): Ground truth boxes
Returns:
:obj:`SamplingResult`: sampler results
"""
pos_inds = torch.nonzero(
assign_result.gt_inds > 0, as_tuple=False).squeeze(-1).unique()
neg_inds = torch.nonzero(
assign_result.gt_inds == 0, as_tuple=False).squeeze(-1).unique()
gt_flags = bboxes.new_zeros(bboxes.shape[0], dtype=torch.uint8)
sampling_result = SamplingResult(pos_inds, neg_inds, bboxes, gt_bboxes,
assign_result, gt_flags)
return sampling_result
| 1,470 | 33.209302 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/visualization/image.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import matplotlib.pyplot as plt
import mmcv
import numpy as np
import pycocotools.mask as mask_util
from matplotlib.collections import PatchCollection
from matplotlib.patches import Polygon
from ..utils import mask2ndarray
EPS = 1e-2
def color_val_matplotlib(color):
"""Convert various input in BGR order to normalized RGB matplotlib color
tuples,
Args:
color (:obj:`Color`/str/tuple/int/ndarray): Color inputs
Returns:
tuple[float]: A tuple of 3 normalized floats indicating RGB channels.
"""
color = mmcv.color_val(color)
color = [color / 255 for color in color[::-1]]
return tuple(color)
def imshow_det_bboxes(img,
bboxes,
labels,
segms=None,
class_names=None,
score_thr=0,
bbox_color='green',
text_color='green',
mask_color=None,
thickness=2,
font_size=13,
win_name='',
show=True,
wait_time=0,
out_file=None):
"""Draw bboxes and class labels (with scores) on an image.
Args:
img (str or ndarray): The image to be displayed.
bboxes (ndarray): Bounding boxes (with scores), shaped (n, 4) or
(n, 5).
labels (ndarray): Labels of bboxes.
segms (ndarray or None): Masks, shaped (n,h,w) or None
class_names (list[str]): Names of each classes.
score_thr (float): Minimum score of bboxes to be shown. Default: 0
bbox_color (str or tuple(int) or :obj:`Color`):Color of bbox lines.
The tuple of color should be in BGR order. Default: 'green'
text_color (str or tuple(int) or :obj:`Color`):Color of texts.
The tuple of color should be in BGR order. Default: 'green'
mask_color (str or tuple(int) or :obj:`Color`, optional):
Color of masks. The tuple of color should be in BGR order.
Default: None
thickness (int): Thickness of lines. Default: 2
font_size (int): Font size of texts. Default: 13
show (bool): Whether to show the image. Default: True
win_name (str): The window name. Default: ''
wait_time (float): Value of waitKey param. Default: 0.
out_file (str, optional): The filename to write the image.
Default: None
Returns:
ndarray: The image with bboxes drawn on it.
"""
assert bboxes.ndim == 2, \
f' bboxes ndim should be 2, but its ndim is {bboxes.ndim}.'
assert labels.ndim == 1, \
f' labels ndim should be 1, but its ndim is {labels.ndim}.'
assert bboxes.shape[0] == labels.shape[0], \
'bboxes.shape[0] and labels.shape[0] should have the same length.'
assert bboxes.shape[1] == 4 or bboxes.shape[1] == 5, \
f' bboxes.shape[1] should be 4 or 5, but its {bboxes.shape[1]}.'
img = mmcv.imread(img).astype(np.uint8)
if score_thr > 0:
assert bboxes.shape[1] == 5
scores = bboxes[:, -1]
inds = scores > score_thr
bboxes = bboxes[inds, :]
labels = labels[inds]
if segms is not None:
segms = segms[inds, ...]
mask_colors = []
if labels.shape[0] > 0:
if mask_color is None:
# Get random state before set seed, and restore random state later.
# Prevent loss of randomness.
# See: https://github.com/open-mmlab/mmdetection/issues/5844
state = np.random.get_state()
# random color
np.random.seed(42)
mask_colors = [
np.random.randint(0, 256, (1, 3), dtype=np.uint8)
for _ in range(max(labels) + 1)
]
np.random.set_state(state)
else:
# specify color
mask_colors = [
np.array(mmcv.color_val(mask_color)[::-1], dtype=np.uint8)
] * (
max(labels) + 1)
bbox_color = color_val_matplotlib(bbox_color)
text_color = color_val_matplotlib(text_color)
img = mmcv.bgr2rgb(img)
width, height = img.shape[1], img.shape[0]
img = np.ascontiguousarray(img)
fig = plt.figure(win_name, frameon=False)
plt.title(win_name)
canvas = fig.canvas
dpi = fig.get_dpi()
# add a small EPS to avoid precision lost due to matplotlib's truncation
# (https://github.com/matplotlib/matplotlib/issues/15363)
fig.set_size_inches((width + EPS) / dpi, (height + EPS) / dpi)
# remove white edges by set subplot margin
plt.subplots_adjust(left=0, right=1, bottom=0, top=1)
ax = plt.gca()
ax.axis('off')
polygons = []
color = []
for i, (bbox, label) in enumerate(zip(bboxes, labels)):
bbox_int = bbox.astype(np.int32)
poly = [[bbox_int[0], bbox_int[1]], [bbox_int[0], bbox_int[3]],
[bbox_int[2], bbox_int[3]], [bbox_int[2], bbox_int[1]]]
np_poly = np.array(poly).reshape((4, 2))
polygons.append(Polygon(np_poly))
color.append(bbox_color)
label_text = class_names[
label] if class_names is not None else f'class {label}'
if len(bbox) > 4:
label_text += f'|{bbox[-1]:.02f}'
ax.text(
bbox_int[0],
bbox_int[1],
f'{label_text}',
bbox={
'facecolor': 'black',
'alpha': 0.8,
'pad': 0.7,
'edgecolor': 'none'
},
color=text_color,
fontsize=font_size,
verticalalignment='top',
horizontalalignment='left')
if segms is not None:
color_mask = mask_colors[labels[i]]
mask = segms[i].astype(bool)
img[mask] = img[mask] * 0.5 + color_mask * 0.5
plt.imshow(img)
p = PatchCollection(
polygons, facecolor='none', edgecolors=color, linewidths=thickness)
ax.add_collection(p)
stream, _ = canvas.print_to_buffer()
buffer = np.frombuffer(stream, dtype='uint8')
img_rgba = buffer.reshape(height, width, 4)
rgb, alpha = np.split(img_rgba, [3], axis=2)
img = rgb.astype('uint8')
img = mmcv.rgb2bgr(img)
if show:
# We do not use cv2 for display because in some cases, opencv will
# conflict with Qt, it will output a warning: Current thread
# is not the object's thread. You can refer to
# https://github.com/opencv/opencv-python/issues/46 for details
if wait_time == 0:
plt.show()
else:
plt.show(block=False)
plt.pause(wait_time)
if out_file is not None:
mmcv.imwrite(img, out_file)
plt.close()
return img
def imshow_gt_det_bboxes(img,
annotation,
result,
class_names=None,
score_thr=0,
gt_bbox_color=(255, 102, 61),
gt_text_color=(255, 102, 61),
gt_mask_color=(255, 102, 61),
det_bbox_color=(72, 101, 241),
det_text_color=(72, 101, 241),
det_mask_color=(72, 101, 241),
thickness=2,
font_size=13,
win_name='',
show=True,
wait_time=0,
out_file=None):
"""General visualization GT and result function.
Args:
img (str or ndarray): The image to be displayed.)
annotation (dict): Ground truth annotations where contain keys of
'gt_bboxes' and 'gt_labels' or 'gt_masks'
result (tuple[list] or list): The detection result, can be either
(bbox, segm) or just bbox.
class_names (list[str]): Names of each classes.
score_thr (float): Minimum score of bboxes to be shown. Default: 0
gt_bbox_color (str or tuple(int) or :obj:`Color`):Color of bbox lines.
The tuple of color should be in BGR order. Default: (255, 102, 61)
gt_text_color (str or tuple(int) or :obj:`Color`):Color of texts.
The tuple of color should be in BGR order. Default: (255, 102, 61)
gt_mask_color (str or tuple(int) or :obj:`Color`, optional):
Color of masks. The tuple of color should be in BGR order.
Default: (255, 102, 61)
det_bbox_color (str or tuple(int) or :obj:`Color`):Color of bbox lines.
The tuple of color should be in BGR order. Default: (72, 101, 241)
det_text_color (str or tuple(int) or :obj:`Color`):Color of texts.
The tuple of color should be in BGR order. Default: (72, 101, 241)
det_mask_color (str or tuple(int) or :obj:`Color`, optional):
Color of masks. The tuple of color should be in BGR order.
Default: (72, 101, 241)
thickness (int): Thickness of lines. Default: 2
font_size (int): Font size of texts. Default: 13
win_name (str): The window name. Default: ''
show (bool): Whether to show the image. Default: True
wait_time (float): Value of waitKey param. Default: 0.
out_file (str, optional): The filename to write the image.
Default: None
Returns:
ndarray: The image with bboxes or masks drawn on it.
"""
assert 'gt_bboxes' in annotation
assert 'gt_labels' in annotation
assert isinstance(
result,
(tuple, list)), f'Expected tuple or list, but get {type(result)}'
gt_masks = annotation.get('gt_masks', None)
if gt_masks is not None:
gt_masks = mask2ndarray(gt_masks)
img = mmcv.imread(img)
img = imshow_det_bboxes(
img,
annotation['gt_bboxes'],
annotation['gt_labels'],
gt_masks,
class_names=class_names,
bbox_color=gt_bbox_color,
text_color=gt_text_color,
mask_color=gt_mask_color,
thickness=thickness,
font_size=font_size,
win_name=win_name,
show=False)
if isinstance(result, tuple):
bbox_result, segm_result = result
if isinstance(segm_result, tuple):
segm_result = segm_result[0] # ms rcnn
else:
bbox_result, segm_result = result, None
bboxes = np.vstack(bbox_result)
labels = [
np.full(bbox.shape[0], i, dtype=np.int32)
for i, bbox in enumerate(bbox_result)
]
labels = np.concatenate(labels)
segms = None
if segm_result is not None and len(labels) > 0: # non empty
segms = mmcv.concat_list(segm_result)
segms = mask_util.decode(segms)
segms = segms.transpose(2, 0, 1)
img = imshow_det_bboxes(
img,
bboxes,
labels,
segms=segms,
class_names=class_names,
score_thr=score_thr,
bbox_color=det_bbox_color,
text_color=det_text_color,
mask_color=det_mask_color,
thickness=thickness,
font_size=font_size,
win_name=win_name,
show=show,
wait_time=wait_time,
out_file=out_file)
return img
| 11,270 | 35.358065 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/visualization/__init__.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from .image import (color_val_matplotlib, imshow_det_bboxes,
imshow_gt_det_bboxes)
__all__ = ['imshow_det_bboxes', 'imshow_gt_det_bboxes', 'color_val_matplotlib']
| 232 | 37.833333 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/data_structures/general_data.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import copy
import numpy as np
import torch
from mmdet.utils.util_mixins import NiceRepr
class GeneralData(NiceRepr):
"""A general data structure of OpenMMlab.
A data structure that stores the meta information,
the annotations of the images or the model predictions,
which can be used in communication between components.
The attributes in `GeneralData` are divided into two parts,
the `meta_info_fields` and the `data_fields` respectively.
- `meta_info_fields`: Usually contains the
information about the image such as filename,
image_shape, pad_shape, etc. All attributes in
it are immutable once set,
but the user can add new meta information with
`set_meta_info` function, all information can be accessed
with methods `meta_info_keys`, `meta_info_values`,
`meta_info_items`.
- `data_fields`: Annotations or model predictions are
stored. The attributes can be accessed or modified by
dict-like or object-like operations, such as
`.` , `[]`, `in`, `del`, `pop(str)` `get(str)`, `keys()`,
`values()`, `items()`. Users can also apply tensor-like methods
to all obj:`torch.Tensor` in the `data_fileds`,
such as `.cuda()`, `.cpu()`, `.numpy()`, `device`, `.to()`
`.detach()`, `.numpy()`
Args:
meta_info (dict, optional): A dict contains the meta information
of single image. such as `img_shape`, `scale_factor`, etc.
Default: None.
data (dict, optional): A dict contains annotations of single image or
model predictions. Default: None.
Examples:
>>> from mmdet.core import GeneralData
>>> img_meta = dict(img_shape=(800, 1196, 3), pad_shape=(800, 1216, 3))
>>> instance_data = GeneralData(meta_info=img_meta)
>>> img_shape in instance_data
True
>>> instance_data.det_labels = torch.LongTensor([0, 1, 2, 3])
>>> instance_data["det_scores"] = torch.Tensor([0.01, 0.1, 0.2, 0.3])
>>> print(results)
<GeneralData(
META INFORMATION
img_shape: (800, 1196, 3)
pad_shape: (800, 1216, 3)
DATA FIELDS
shape of det_labels: torch.Size([4])
shape of det_scores: torch.Size([4])
) at 0x7f84acd10f90>
>>> instance_data.det_scores
tensor([0.0100, 0.1000, 0.2000, 0.3000])
>>> instance_data.det_labels
tensor([0, 1, 2, 3])
>>> instance_data['det_labels']
tensor([0, 1, 2, 3])
>>> 'det_labels' in instance_data
True
>>> instance_data.img_shape
(800, 1196, 3)
>>> 'det_scores' in instance_data
True
>>> del instance_data.det_scores
>>> 'det_scores' in instance_data
False
>>> det_labels = instance_data.pop('det_labels', None)
>>> det_labels
tensor([0, 1, 2, 3])
>>> 'det_labels' in instance_data
>>> False
"""
def __init__(self, meta_info=None, data=None):
self._meta_info_fields = set()
self._data_fields = set()
if meta_info is not None:
self.set_meta_info(meta_info=meta_info)
if data is not None:
self.set_data(data)
def set_meta_info(self, meta_info):
"""Add meta information.
Args:
meta_info (dict): A dict contains the meta information
of image. such as `img_shape`, `scale_factor`, etc.
Default: None.
"""
assert isinstance(meta_info,
dict), f'meta should be a `dict` but get {meta_info}'
meta = copy.deepcopy(meta_info)
for k, v in meta.items():
# should be consistent with original meta_info
if k in self._meta_info_fields:
ori_value = getattr(self, k)
if isinstance(ori_value, (torch.Tensor, np.ndarray)):
if (ori_value == v).all():
continue
else:
raise KeyError(
f'img_meta_info {k} has been set as '
f'{getattr(self, k)} before, which is immutable ')
elif ori_value == v:
continue
else:
raise KeyError(
f'img_meta_info {k} has been set as '
f'{getattr(self, k)} before, which is immutable ')
else:
self._meta_info_fields.add(k)
self.__dict__[k] = v
def set_data(self, data):
"""Update a dict to `data_fields`.
Args:
data (dict): A dict contains annotations of image or
model predictions. Default: None.
"""
assert isinstance(data,
dict), f'meta should be a `dict` but get {data}'
for k, v in data.items():
self.__setattr__(k, v)
def new(self, meta_info=None, data=None):
"""Return a new results with same image meta information.
Args:
meta_info (dict, optional): A dict contains the meta information
of image. such as `img_shape`, `scale_factor`, etc.
Default: None.
data (dict, optional): A dict contains annotations of image or
model predictions. Default: None.
"""
new_data = self.__class__()
new_data.set_meta_info(dict(self.meta_info_items()))
if meta_info is not None:
new_data.set_meta_info(meta_info)
if data is not None:
new_data.set_data(data)
return new_data
def keys(self):
"""
Returns:
list: Contains all keys in data_fields.
"""
return [key for key in self._data_fields]
def meta_info_keys(self):
"""
Returns:
list: Contains all keys in meta_info_fields.
"""
return [key for key in self._meta_info_fields]
def values(self):
"""
Returns:
list: Contains all values in data_fields.
"""
return [getattr(self, k) for k in self.keys()]
def meta_info_values(self):
"""
Returns:
list: Contains all values in meta_info_fields.
"""
return [getattr(self, k) for k in self.meta_info_keys()]
def items(self):
for k in self.keys():
yield (k, getattr(self, k))
def meta_info_items(self):
for k in self.meta_info_keys():
yield (k, getattr(self, k))
def __setattr__(self, name, val):
if name in ('_meta_info_fields', '_data_fields'):
if not hasattr(self, name):
super().__setattr__(name, val)
else:
raise AttributeError(
f'{name} has been used as a '
f'private attribute, which is immutable. ')
else:
if name in self._meta_info_fields:
raise AttributeError(f'`{name}` is used in meta information,'
f'which is immutable')
self._data_fields.add(name)
super().__setattr__(name, val)
def __delattr__(self, item):
if item in ('_meta_info_fields', '_data_fields'):
raise AttributeError(f'{item} has been used as a '
f'private attribute, which is immutable. ')
if item in self._meta_info_fields:
raise KeyError(f'{item} is used in meta information, '
f'which is immutable.')
super().__delattr__(item)
if item in self._data_fields:
self._data_fields.remove(item)
# dict-like methods
__setitem__ = __setattr__
__delitem__ = __delattr__
def __getitem__(self, name):
return getattr(self, name)
def get(self, *args):
assert len(args) < 3, '`get` get more than 2 arguments'
return self.__dict__.get(*args)
def pop(self, *args):
assert len(args) < 3, '`pop` get more than 2 arguments'
name = args[0]
if name in self._meta_info_fields:
raise KeyError(f'{name} is a key in meta information, '
f'which is immutable')
if args[0] in self._data_fields:
self._data_fields.remove(args[0])
return self.__dict__.pop(*args)
# with default value
elif len(args) == 2:
return args[1]
else:
raise KeyError(f'{args[0]}')
def __contains__(self, item):
return item in self._data_fields or \
item in self._meta_info_fields
# Tensor-like methods
def to(self, *args, **kwargs):
"""Apply same name function to all tensors in data_fields."""
new_data = self.new()
for k, v in self.items():
if hasattr(v, 'to'):
v = v.to(*args, **kwargs)
new_data[k] = v
return new_data
# Tensor-like methods
def cpu(self):
"""Apply same name function to all tensors in data_fields."""
new_data = self.new()
for k, v in self.items():
if isinstance(v, torch.Tensor):
v = v.cpu()
new_data[k] = v
return new_data
# Tensor-like methods
def cuda(self):
"""Apply same name function to all tensors in data_fields."""
new_data = self.new()
for k, v in self.items():
if isinstance(v, torch.Tensor):
v = v.cuda()
new_data[k] = v
return new_data
# Tensor-like methods
def detach(self):
"""Apply same name function to all tensors in data_fields."""
new_data = self.new()
for k, v in self.items():
if isinstance(v, torch.Tensor):
v = v.detach()
new_data[k] = v
return new_data
# Tensor-like methods
def numpy(self):
"""Apply same name function to all tensors in data_fields."""
new_data = self.new()
for k, v in self.items():
if isinstance(v, torch.Tensor):
v = v.detach().cpu().numpy()
new_data[k] = v
return new_data
def __nice__(self):
repr = '\n \n META INFORMATION \n'
for k, v in self.meta_info_items():
repr += f'{k}: {v} \n'
repr += '\n DATA FIELDS \n'
for k, v in self.items():
if isinstance(v, (torch.Tensor, np.ndarray)):
repr += f'shape of {k}: {v.shape} \n'
else:
repr += f'{k}: {v} \n'
return repr + '\n'
| 10,806 | 33.091483 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/data_structures/__init__.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from .general_data import GeneralData
from .instance_data import InstanceData
__all__ = ['GeneralData', 'InstanceData']
| 169 | 27.333333 | 47 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/data_structures/instance_data.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import itertools
import numpy as np
import torch
from .general_data import GeneralData
class InstanceData(GeneralData):
"""Data structure for instance-level annnotations or predictions.
Subclass of :class:`GeneralData`. All value in `data_fields`
should have the same length. This design refer to
https://github.com/facebookresearch/detectron2/blob/master/detectron2/structures/instances.py # noqa E501
Examples:
>>> from mmdet.core import InstanceData
>>> import numpy as np
>>> img_meta = dict(img_shape=(800, 1196, 3), pad_shape=(800, 1216, 3))
>>> results = InstanceData(img_meta)
>>> img_shape in results
True
>>> results.det_labels = torch.LongTensor([0, 1, 2, 3])
>>> results["det_scores"] = torch.Tensor([0.01, 0.7, 0.6, 0.3])
>>> results["det_masks"] = np.ndarray(4, 2, 2)
>>> len(results)
4
>>> print(resutls)
<InstanceData(
META INFORMATION
pad_shape: (800, 1216, 3)
img_shape: (800, 1196, 3)
PREDICTIONS
shape of det_labels: torch.Size([4])
shape of det_masks: (4, 2, 2)
shape of det_scores: torch.Size([4])
) at 0x7fe26b5ca990>
>>> sorted_results = results[results.det_scores.sort().indices]
>>> sorted_results.det_scores
tensor([0.0100, 0.3000, 0.6000, 0.7000])
>>> sorted_results.det_labels
tensor([0, 3, 2, 1])
>>> print(results[results.scores > 0.5])
<InstanceData(
META INFORMATION
pad_shape: (800, 1216, 3)
img_shape: (800, 1196, 3)
PREDICTIONS
shape of det_labels: torch.Size([2])
shape of det_masks: (2, 2, 2)
shape of det_scores: torch.Size([2])
) at 0x7fe26b6d7790>
>>> results[results.det_scores > 0.5].det_labels
tensor([1, 2])
>>> results[results.det_scores > 0.5].det_scores
tensor([0.7000, 0.6000])
"""
def __setattr__(self, name, value):
if name in ('_meta_info_fields', '_data_fields'):
if not hasattr(self, name):
super().__setattr__(name, value)
else:
raise AttributeError(
f'{name} has been used as a '
f'private attribute, which is immutable. ')
else:
assert isinstance(value, (torch.Tensor, np.ndarray, list)), \
f'Can set {type(value)}, only support' \
f' {(torch.Tensor, np.ndarray, list)}'
if self._data_fields:
assert len(value) == len(self), f'the length of ' \
f'values {len(value)} is ' \
f'not consistent with' \
f' the length ' \
f'of this :obj:`InstanceData` ' \
f'{len(self)} '
super().__setattr__(name, value)
def __getitem__(self, item):
"""
Args:
item (str, obj:`slice`,
obj`torch.LongTensor`, obj:`torch.BoolTensor`):
get the corresponding values according to item.
Returns:
obj:`InstanceData`: Corresponding values.
"""
assert len(self), ' This is a empty instance'
assert isinstance(
item, (str, slice, int, torch.LongTensor, torch.BoolTensor))
if isinstance(item, str):
return getattr(self, item)
if type(item) == int:
if item >= len(self) or item < -len(self):
raise IndexError(f'Index {item} out of range!')
else:
# keep the dimension
item = slice(item, None, len(self))
new_data = self.new()
if isinstance(item, (torch.Tensor)):
assert item.dim() == 1, 'Only support to get the' \
' values along the first dimension.'
if isinstance(item, torch.BoolTensor):
assert len(item) == len(self), f'The shape of the' \
f' input(BoolTensor)) ' \
f'{len(item)} ' \
f' does not match the shape ' \
f'of the indexed tensor ' \
f'in results_filed ' \
f'{len(self)} at ' \
f'first dimension. '
for k, v in self.items():
if isinstance(v, torch.Tensor):
new_data[k] = v[item]
elif isinstance(v, np.ndarray):
new_data[k] = v[item.cpu().numpy()]
elif isinstance(v, list):
r_list = []
# convert to indexes from boolTensor
if isinstance(item, torch.BoolTensor):
indexes = torch.nonzero(item).view(-1)
else:
indexes = item
for index in indexes:
r_list.append(v[index])
new_data[k] = r_list
else:
# item is a slice
for k, v in self.items():
new_data[k] = v[item]
return new_data
@staticmethod
def cat(instances_list):
"""Concat the predictions of all :obj:`InstanceData` in the list.
Args:
instances_list (list[:obj:`InstanceData`]): A list
of :obj:`InstanceData`.
Returns:
obj:`InstanceData`
"""
assert all(
isinstance(results, InstanceData) for results in instances_list)
assert len(instances_list) > 0
if len(instances_list) == 1:
return instances_list[0]
new_data = instances_list[0].new()
for k in instances_list[0]._data_fields:
values = [results[k] for results in instances_list]
v0 = values[0]
if isinstance(v0, torch.Tensor):
values = torch.cat(values, dim=0)
elif isinstance(v0, np.ndarray):
values = np.concatenate(values, axis=0)
elif isinstance(v0, list):
values = list(itertools.chain(*values))
else:
raise ValueError(
f'Can not concat the {k} which is a {type(v0)}')
new_data[k] = values
return new_data
def __len__(self):
if len(self._data_fields):
for v in self.values():
return len(v)
else:
raise AssertionError('This is an empty `InstanceData`.')
| 6,926 | 35.650794 | 109 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/utils/dist_utils.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import functools
import pickle
import warnings
from collections import OrderedDict
import torch
import torch.distributed as dist
from mmcv.runner import OptimizerHook, get_dist_info
from torch._utils import (_flatten_dense_tensors, _take_tensors,
_unflatten_dense_tensors)
def _allreduce_coalesced(tensors, world_size, bucket_size_mb=-1):
if bucket_size_mb > 0:
bucket_size_bytes = bucket_size_mb * 1024 * 1024
buckets = _take_tensors(tensors, bucket_size_bytes)
else:
buckets = OrderedDict()
for tensor in tensors:
tp = tensor.type()
if tp not in buckets:
buckets[tp] = []
buckets[tp].append(tensor)
buckets = buckets.values()
for bucket in buckets:
flat_tensors = _flatten_dense_tensors(bucket)
dist.all_reduce(flat_tensors)
flat_tensors.div_(world_size)
for tensor, synced in zip(
bucket, _unflatten_dense_tensors(flat_tensors, bucket)):
tensor.copy_(synced)
def allreduce_grads(params, coalesce=True, bucket_size_mb=-1):
"""Allreduce gradients.
Args:
params (list[torch.Parameters]): List of parameters of a model
coalesce (bool, optional): Whether allreduce parameters as a whole.
Defaults to True.
bucket_size_mb (int, optional): Size of bucket, the unit is MB.
Defaults to -1.
"""
grads = [
param.grad.data for param in params
if param.requires_grad and param.grad is not None
]
world_size = dist.get_world_size()
if coalesce:
_allreduce_coalesced(grads, world_size, bucket_size_mb)
else:
for tensor in grads:
dist.all_reduce(tensor.div_(world_size))
class DistOptimizerHook(OptimizerHook):
"""Deprecated optimizer hook for distributed training."""
def __init__(self, *args, **kwargs):
warnings.warn('"DistOptimizerHook" is deprecated, please switch to'
'"mmcv.runner.OptimizerHook".')
super().__init__(*args, **kwargs)
def reduce_mean(tensor):
""""Obtain the mean of tensor on different GPUs."""
if not (dist.is_available() and dist.is_initialized()):
return tensor
tensor = tensor.clone()
dist.all_reduce(tensor.div_(dist.get_world_size()), op=dist.ReduceOp.SUM)
return tensor
def obj2tensor(pyobj, device='cuda'):
"""Serialize picklable python object to tensor."""
storage = torch.ByteStorage.from_buffer(pickle.dumps(pyobj))
return torch.ByteTensor(storage).to(device=device)
def tensor2obj(tensor):
"""Deserialize tensor to picklable python object."""
return pickle.loads(tensor.cpu().numpy().tobytes())
@functools.lru_cache()
def _get_global_gloo_group():
"""Return a process group based on gloo backend, containing all the ranks
The result is cached."""
if dist.get_backend() == 'nccl':
return dist.new_group(backend='gloo')
else:
return dist.group.WORLD
def all_reduce_dict(py_dict, op='sum', group=None, to_float=True):
"""Apply all reduce function for python dict object.
The code is modified from https://github.com/Megvii-
BaseDetection/YOLOX/blob/main/yolox/utils/allreduce_norm.py.
NOTE: make sure that py_dict in different ranks has the same keys and
the values should be in the same shape. Currently only supports
nccl backend.
Args:
py_dict (dict): Dict to be applied all reduce op.
op (str): Operator, could be 'sum' or 'mean'. Default: 'sum'
group (:obj:`torch.distributed.group`, optional): Distributed group,
Default: None.
to_float (bool): Whether to convert all values of dict to float.
Default: True.
Returns:
OrderedDict: reduced python dict object.
"""
warnings.warn(
'group` is deprecated. Currently only supports NCCL backend.')
_, world_size = get_dist_info()
if world_size == 1:
return py_dict
# all reduce logic across different devices.
py_key = list(py_dict.keys())
if not isinstance(py_dict, OrderedDict):
py_key_tensor = obj2tensor(py_key)
dist.broadcast(py_key_tensor, src=0)
py_key = tensor2obj(py_key_tensor)
tensor_shapes = [py_dict[k].shape for k in py_key]
tensor_numels = [py_dict[k].numel() for k in py_key]
if to_float:
warnings.warn('Note: the "to_float" is True, you need to '
'ensure that the behavior is reasonable.')
flatten_tensor = torch.cat(
[py_dict[k].flatten().float() for k in py_key])
else:
flatten_tensor = torch.cat([py_dict[k].flatten() for k in py_key])
dist.all_reduce(flatten_tensor, op=dist.ReduceOp.SUM)
if op == 'mean':
flatten_tensor /= world_size
split_tensors = [
x.reshape(shape) for x, shape in zip(
torch.split(flatten_tensor, tensor_numels), tensor_shapes)
]
out_dict = {k: v for k, v in zip(py_key, split_tensors)}
if isinstance(py_dict, OrderedDict):
out_dict = OrderedDict(out_dict)
return out_dict
| 5,201 | 32.779221 | 77 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/utils/misc.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from functools import partial
import numpy as np
import torch
from six.moves import map, zip
from ..mask.structures import BitmapMasks, PolygonMasks
def multi_apply(func, *args, **kwargs):
"""Apply function to a list of arguments.
Note:
This function applies the ``func`` to multiple inputs and
map the multiple outputs of the ``func`` into different
list. Each list contains the same type of outputs corresponding
to different inputs.
Args:
func (Function): A function that will be applied to a list of
arguments
Returns:
tuple(list): A tuple containing multiple list, each list contains \
a kind of returned results by the function
"""
pfunc = partial(func, **kwargs) if kwargs else func
map_results = map(pfunc, *args)
return tuple(map(list, zip(*map_results)))
def unmap(data, count, inds, fill=0):
"""Unmap a subset of item (data) back to the original set of items (of size
count)"""
if data.dim() == 1:
ret = data.new_full((count, ), fill)
ret[inds.type(torch.bool)] = data
else:
new_size = (count, ) + data.size()[1:]
ret = data.new_full(new_size, fill)
ret[inds.type(torch.bool), :] = data
return ret
def mask2ndarray(mask):
"""Convert Mask to ndarray..
Args:
mask (:obj:`BitmapMasks` or :obj:`PolygonMasks` or
torch.Tensor or np.ndarray): The mask to be converted.
Returns:
np.ndarray: Ndarray mask of shape (n, h, w) that has been converted
"""
if isinstance(mask, (BitmapMasks, PolygonMasks)):
mask = mask.to_ndarray()
elif isinstance(mask, torch.Tensor):
mask = mask.detach().cpu().numpy()
elif not isinstance(mask, np.ndarray):
raise TypeError(f'Unsupported {type(mask)} data type')
return mask
def flip_tensor(src_tensor, flip_direction):
"""flip tensor base on flip_direction.
Args:
src_tensor (Tensor): input feature map, shape (B, C, H, W).
flip_direction (str): The flipping direction. Options are
'horizontal', 'vertical', 'diagonal'.
Returns:
out_tensor (Tensor): Flipped tensor.
"""
assert src_tensor.ndim == 4
valid_directions = ['horizontal', 'vertical', 'diagonal']
assert flip_direction in valid_directions
if flip_direction == 'horizontal':
out_tensor = torch.flip(src_tensor, [3])
elif flip_direction == 'vertical':
out_tensor = torch.flip(src_tensor, [2])
else:
out_tensor = torch.flip(src_tensor, [2, 3])
return out_tensor
def select_single_mlvl(mlvl_tensors, batch_id, detach=True):
"""Extract a multi-scale single image tensor from a multi-scale batch
tensor based on batch index.
Note: The default value of detach is True, because the proposal gradient
needs to be detached during the training of the two-stage model. E.g
Cascade Mask R-CNN.
Args:
mlvl_tensors (list[Tensor]): Batch tensor for all scale levels,
each is a 4D-tensor.
batch_id (int): Batch index.
detach (bool): Whether detach gradient. Default True.
Returns:
list[Tensor]: Multi-scale single image tensor.
"""
assert isinstance(mlvl_tensors, (list, tuple))
num_levels = len(mlvl_tensors)
if detach:
mlvl_tensor_list = [
mlvl_tensors[i][batch_id].detach() for i in range(num_levels)
]
else:
mlvl_tensor_list = [
mlvl_tensors[i][batch_id] for i in range(num_levels)
]
return mlvl_tensor_list
def filter_scores_and_topk(scores, score_thr, topk, results=None):
"""Filter results using score threshold and topk candidates.
Args:
scores (Tensor): The scores, shape (num_bboxes, K).
score_thr (float): The score filter threshold.
topk (int): The number of topk candidates.
results (dict or list or Tensor, Optional): The results to
which the filtering rule is to be applied. The shape
of each item is (num_bboxes, N).
Returns:
tuple: Filtered results
- scores (Tensor): The scores after being filtered, \
shape (num_bboxes_filtered, ).
- labels (Tensor): The class labels, shape \
(num_bboxes_filtered, ).
- anchor_idxs (Tensor): The anchor indexes, shape \
(num_bboxes_filtered, ).
- filtered_results (dict or list or Tensor, Optional): \
The filtered results. The shape of each item is \
(num_bboxes_filtered, N).
"""
valid_mask = scores > score_thr
scores = scores[valid_mask]
valid_idxs = torch.nonzero(valid_mask)
num_topk = min(topk, valid_idxs.size(0))
# torch.sort is actually faster than .topk (at least on GPUs)
scores, idxs = scores.sort(descending=True)
scores = scores[:num_topk]
topk_idxs = valid_idxs[idxs[:num_topk]]
keep_idxs, labels = topk_idxs.unbind(dim=1)
filtered_results = None
if results is not None:
if isinstance(results, dict):
filtered_results = {k: v[keep_idxs] for k, v in results.items()}
elif isinstance(results, list):
filtered_results = [result[keep_idxs] for result in results]
elif isinstance(results, torch.Tensor):
filtered_results = results[keep_idxs]
else:
raise NotImplementedError(f'Only supports dict or list or Tensor, '
f'but get {type(results)}.')
return scores, labels, keep_idxs, filtered_results
def center_of_mass(mask, esp=1e-6):
"""Calculate the centroid coordinates of the mask.
Args:
mask (Tensor): The mask to be calculated, shape (h, w).
esp (float): Avoid dividing by zero. Default: 1e-6.
Returns:
tuple[Tensor]: the coordinates of the center point of the mask.
- center_h (Tensor): the center point of the height.
- center_w (Tensor): the center point of the width.
"""
h, w = mask.shape
grid_h = torch.arange(h, device=mask.device)[:, None]
grid_w = torch.arange(w, device=mask.device)
normalizer = mask.sum().float().clamp(min=esp)
center_h = (mask * grid_h).sum() / normalizer
center_w = (mask * grid_w).sum() / normalizer
return center_h, center_w
def generate_coordinate(featmap_sizes, device='cuda'):
"""Generate the coordinate.
Args:
featmap_sizes (tuple): The feature to be calculated,
of shape (N, C, W, H).
device (str): The device where the feature will be put on.
Returns:
coord_feat (Tensor): The coordinate feature, of shape (N, 2, W, H).
"""
x_range = torch.linspace(-1, 1, featmap_sizes[-1], device=device)
y_range = torch.linspace(-1, 1, featmap_sizes[-2], device=device)
y, x = torch.meshgrid(y_range, x_range)
y = y.expand([featmap_sizes[0], 1, -1, -1])
x = x.expand([featmap_sizes[0], 1, -1, -1])
coord_feat = torch.cat([x, y], 1)
return coord_feat
| 7,147 | 33.200957 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/utils/__init__.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from .dist_utils import (DistOptimizerHook, all_reduce_dict, allreduce_grads,
reduce_mean)
from .misc import (center_of_mass, filter_scores_and_topk, flip_tensor,
generate_coordinate, mask2ndarray, multi_apply,
select_single_mlvl, unmap)
__all__ = [
'allreduce_grads', 'DistOptimizerHook', 'reduce_mean', 'multi_apply',
'unmap', 'mask2ndarray', 'flip_tensor', 'all_reduce_dict',
'center_of_mass', 'generate_coordinate', 'select_single_mlvl',
'filter_scores_and_topk'
]
| 597 | 41.714286 | 77 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/anchor/point_generator.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import numpy as np
import torch
from torch.nn.modules.utils import _pair
from .builder import PRIOR_GENERATORS
@PRIOR_GENERATORS.register_module()
class PointGenerator:
def _meshgrid(self, x, y, row_major=True):
xx = x.repeat(len(y))
yy = y.view(-1, 1).repeat(1, len(x)).view(-1)
if row_major:
return xx, yy
else:
return yy, xx
def grid_points(self, featmap_size, stride=16, device='cuda'):
feat_h, feat_w = featmap_size
shift_x = torch.arange(0., feat_w, device=device) * stride
shift_y = torch.arange(0., feat_h, device=device) * stride
shift_xx, shift_yy = self._meshgrid(shift_x, shift_y)
stride = shift_x.new_full((shift_xx.shape[0], ), stride)
shifts = torch.stack([shift_xx, shift_yy, stride], dim=-1)
all_points = shifts.to(device)
return all_points
def valid_flags(self, featmap_size, valid_size, device='cuda'):
feat_h, feat_w = featmap_size
valid_h, valid_w = valid_size
assert valid_h <= feat_h and valid_w <= feat_w
valid_x = torch.zeros(feat_w, dtype=torch.bool, device=device)
valid_y = torch.zeros(feat_h, dtype=torch.bool, device=device)
valid_x[:valid_w] = 1
valid_y[:valid_h] = 1
valid_xx, valid_yy = self._meshgrid(valid_x, valid_y)
valid = valid_xx & valid_yy
return valid
@PRIOR_GENERATORS.register_module()
class MlvlPointGenerator:
"""Standard points generator for multi-level (Mlvl) feature maps in 2D
points-based detectors.
Args:
strides (list[int] | list[tuple[int, int]]): Strides of anchors
in multiple feature levels in order (w, h).
offset (float): The offset of points, the value is normalized with
corresponding stride. Defaults to 0.5.
"""
def __init__(self, strides, offset=0.5):
self.strides = [_pair(stride) for stride in strides]
self.offset = offset
@property
def num_levels(self):
"""int: number of feature levels that the generator will be applied"""
return len(self.strides)
@property
def num_base_priors(self):
"""list[int]: The number of priors (points) at a point
on the feature grid"""
return [1 for _ in range(len(self.strides))]
def _meshgrid(self, x, y, row_major=True):
yy, xx = torch.meshgrid(y, x)
if row_major:
# warning .flatten() would cause error in ONNX exporting
# have to use reshape here
return xx.reshape(-1), yy.reshape(-1)
else:
return yy.reshape(-1), xx.reshape(-1)
def grid_priors(self,
featmap_sizes,
dtype=torch.float32,
device='cuda',
with_stride=False):
"""Generate grid points of multiple feature levels.
Args:
featmap_sizes (list[tuple]): List of feature map sizes in
multiple feature levels, each size arrange as
as (h, w).
dtype (:obj:`dtype`): Dtype of priors. Default: torch.float32.
device (str): The device where the anchors will be put on.
with_stride (bool): Whether to concatenate the stride to
the last dimension of points.
Return:
list[torch.Tensor]: Points of multiple feature levels.
The sizes of each tensor should be (N, 2) when with stride is
``False``, where N = width * height, width and height
are the sizes of the corresponding feature level,
and the last dimension 2 represent (coord_x, coord_y),
otherwise the shape should be (N, 4),
and the last dimension 4 represent
(coord_x, coord_y, stride_w, stride_h).
"""
assert self.num_levels == len(featmap_sizes)
multi_level_priors = []
for i in range(self.num_levels):
priors = self.single_level_grid_priors(
featmap_sizes[i],
level_idx=i,
dtype=dtype,
device=device,
with_stride=with_stride)
multi_level_priors.append(priors)
return multi_level_priors
def single_level_grid_priors(self,
featmap_size,
level_idx,
dtype=torch.float32,
device='cuda',
with_stride=False):
"""Generate grid Points of a single level.
Note:
This function is usually called by method ``self.grid_priors``.
Args:
featmap_size (tuple[int]): Size of the feature maps, arrange as
(h, w).
level_idx (int): The index of corresponding feature map level.
dtype (:obj:`dtype`): Dtype of priors. Default: torch.float32.
device (str, optional): The device the tensor will be put on.
Defaults to 'cuda'.
with_stride (bool): Concatenate the stride to the last dimension
of points.
Return:
Tensor: Points of single feature levels.
The shape of tensor should be (N, 2) when with stride is
``False``, where N = width * height, width and height
are the sizes of the corresponding feature level,
and the last dimension 2 represent (coord_x, coord_y),
otherwise the shape should be (N, 4),
and the last dimension 4 represent
(coord_x, coord_y, stride_w, stride_h).
"""
feat_h, feat_w = featmap_size
stride_w, stride_h = self.strides[level_idx]
shift_x = (torch.arange(0, feat_w, device=device) +
self.offset) * stride_w
# keep featmap_size as Tensor instead of int, so that we
# can convert to ONNX correctly
shift_x = shift_x.to(dtype)
shift_y = (torch.arange(0, feat_h, device=device) +
self.offset) * stride_h
# keep featmap_size as Tensor instead of int, so that we
# can convert to ONNX correctly
shift_y = shift_y.to(dtype)
shift_xx, shift_yy = self._meshgrid(shift_x, shift_y)
if not with_stride:
shifts = torch.stack([shift_xx, shift_yy], dim=-1)
else:
# use `shape[0]` instead of `len(shift_xx)` for ONNX export
stride_w = shift_xx.new_full((shift_xx.shape[0], ),
stride_w).to(dtype)
stride_h = shift_xx.new_full((shift_yy.shape[0], ),
stride_h).to(dtype)
shifts = torch.stack([shift_xx, shift_yy, stride_w, stride_h],
dim=-1)
all_points = shifts.to(device)
return all_points
def valid_flags(self, featmap_sizes, pad_shape, device='cuda'):
"""Generate valid flags of points of multiple feature levels.
Args:
featmap_sizes (list(tuple)): List of feature map sizes in
multiple feature levels, each size arrange as
as (h, w).
pad_shape (tuple(int)): The padded shape of the image,
arrange as (h, w).
device (str): The device where the anchors will be put on.
Return:
list(torch.Tensor): Valid flags of points of multiple levels.
"""
assert self.num_levels == len(featmap_sizes)
multi_level_flags = []
for i in range(self.num_levels):
point_stride = self.strides[i]
feat_h, feat_w = featmap_sizes[i]
h, w = pad_shape[:2]
valid_feat_h = min(int(np.ceil(h / point_stride[1])), feat_h)
valid_feat_w = min(int(np.ceil(w / point_stride[0])), feat_w)
flags = self.single_level_valid_flags((feat_h, feat_w),
(valid_feat_h, valid_feat_w),
device=device)
multi_level_flags.append(flags)
return multi_level_flags
def single_level_valid_flags(self,
featmap_size,
valid_size,
device='cuda'):
"""Generate the valid flags of points of a single feature map.
Args:
featmap_size (tuple[int]): The size of feature maps, arrange as
as (h, w).
valid_size (tuple[int]): The valid size of the feature maps.
The size arrange as as (h, w).
device (str, optional): The device where the flags will be put on.
Defaults to 'cuda'.
Returns:
torch.Tensor: The valid flags of each points in a single level \
feature map.
"""
feat_h, feat_w = featmap_size
valid_h, valid_w = valid_size
assert valid_h <= feat_h and valid_w <= feat_w
valid_x = torch.zeros(feat_w, dtype=torch.bool, device=device)
valid_y = torch.zeros(feat_h, dtype=torch.bool, device=device)
valid_x[:valid_w] = 1
valid_y[:valid_h] = 1
valid_xx, valid_yy = self._meshgrid(valid_x, valid_y)
valid = valid_xx & valid_yy
return valid
def sparse_priors(self,
prior_idxs,
featmap_size,
level_idx,
dtype=torch.float32,
device='cuda'):
"""Generate sparse points according to the ``prior_idxs``.
Args:
prior_idxs (Tensor): The index of corresponding anchors
in the feature map.
featmap_size (tuple[int]): feature map size arrange as (w, h).
level_idx (int): The level index of corresponding feature
map.
dtype (obj:`torch.dtype`): Date type of points. Defaults to
``torch.float32``.
device (obj:`torch.device`): The device where the points is
located.
Returns:
Tensor: Anchor with shape (N, 2), N should be equal to
the length of ``prior_idxs``. And last dimension
2 represent (coord_x, coord_y).
"""
height, width = featmap_size
x = (prior_idxs % width + self.offset) * self.strides[level_idx][0]
y = ((prior_idxs // width) % height +
self.offset) * self.strides[level_idx][1]
prioris = torch.stack([x, y], 1).to(dtype)
prioris = prioris.to(device)
return prioris
| 10,739 | 39.681818 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/anchor/anchor_generator.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import warnings
import mmcv
import numpy as np
import torch
from torch.nn.modules.utils import _pair
from .builder import PRIOR_GENERATORS
@PRIOR_GENERATORS.register_module()
class AnchorGenerator:
"""Standard anchor generator for 2D anchor-based detectors.
Args:
strides (list[int] | list[tuple[int, int]]): Strides of anchors
in multiple feature levels in order (w, h).
ratios (list[float]): The list of ratios between the height and width
of anchors in a single level.
scales (list[int] | None): Anchor scales for anchors in a single level.
It cannot be set at the same time if `octave_base_scale` and
`scales_per_octave` are set.
base_sizes (list[int] | None): The basic sizes
of anchors in multiple levels.
If None is given, strides will be used as base_sizes.
(If strides are non square, the shortest stride is taken.)
scale_major (bool): Whether to multiply scales first when generating
base anchors. If true, the anchors in the same row will have the
same scales. By default it is True in V2.0
octave_base_scale (int): The base scale of octave.
scales_per_octave (int): Number of scales for each octave.
`octave_base_scale` and `scales_per_octave` are usually used in
retinanet and the `scales` should be None when they are set.
centers (list[tuple[float, float]] | None): The centers of the anchor
relative to the feature grid center in multiple feature levels.
By default it is set to be None and not used. If a list of tuple of
float is given, they will be used to shift the centers of anchors.
center_offset (float): The offset of center in proportion to anchors'
width and height. By default it is 0 in V2.0.
Examples:
>>> from mmdet.core import AnchorGenerator
>>> self = AnchorGenerator([16], [1.], [1.], [9])
>>> all_anchors = self.grid_priors([(2, 2)], device='cpu')
>>> print(all_anchors)
[tensor([[-4.5000, -4.5000, 4.5000, 4.5000],
[11.5000, -4.5000, 20.5000, 4.5000],
[-4.5000, 11.5000, 4.5000, 20.5000],
[11.5000, 11.5000, 20.5000, 20.5000]])]
>>> self = AnchorGenerator([16, 32], [1.], [1.], [9, 18])
>>> all_anchors = self.grid_priors([(2, 2), (1, 1)], device='cpu')
>>> print(all_anchors)
[tensor([[-4.5000, -4.5000, 4.5000, 4.5000],
[11.5000, -4.5000, 20.5000, 4.5000],
[-4.5000, 11.5000, 4.5000, 20.5000],
[11.5000, 11.5000, 20.5000, 20.5000]]), \
tensor([[-9., -9., 9., 9.]])]
"""
def __init__(self,
strides,
ratios,
scales=None,
base_sizes=None,
scale_major=True,
octave_base_scale=None,
scales_per_octave=None,
centers=None,
center_offset=0.):
# check center and center_offset
if center_offset != 0:
assert centers is None, 'center cannot be set when center_offset' \
f'!=0, {centers} is given.'
if not (0 <= center_offset <= 1):
raise ValueError('center_offset should be in range [0, 1], '
f'{center_offset} is given.')
if centers is not None:
assert len(centers) == len(strides), \
'The number of strides should be the same as centers, got ' \
f'{strides} and {centers}'
# calculate base sizes of anchors
self.strides = [_pair(stride) for stride in strides]
self.base_sizes = [min(stride) for stride in self.strides
] if base_sizes is None else base_sizes
assert len(self.base_sizes) == len(self.strides), \
'The number of strides should be the same as base sizes, got ' \
f'{self.strides} and {self.base_sizes}'
# calculate scales of anchors
assert ((octave_base_scale is not None
and scales_per_octave is not None) ^ (scales is not None)), \
'scales and octave_base_scale with scales_per_octave cannot' \
' be set at the same time'
if scales is not None:
self.scales = torch.Tensor(scales)
elif octave_base_scale is not None and scales_per_octave is not None:
octave_scales = np.array(
[2**(i / scales_per_octave) for i in range(scales_per_octave)])
scales = octave_scales * octave_base_scale
self.scales = torch.Tensor(scales)
else:
raise ValueError('Either scales or octave_base_scale with '
'scales_per_octave should be set')
self.octave_base_scale = octave_base_scale
self.scales_per_octave = scales_per_octave
self.ratios = torch.Tensor(ratios)
self.scale_major = scale_major
self.centers = centers
self.center_offset = center_offset
self.base_anchors = self.gen_base_anchors()
@property
def num_base_anchors(self):
"""list[int]: total number of base anchors in a feature grid"""
return self.num_base_priors
@property
def num_base_priors(self):
"""list[int]: The number of priors (anchors) at a point
on the feature grid"""
return [base_anchors.size(0) for base_anchors in self.base_anchors]
@property
def num_levels(self):
"""int: number of feature levels that the generator will be applied"""
return len(self.strides)
def gen_base_anchors(self):
"""Generate base anchors.
Returns:
list(torch.Tensor): Base anchors of a feature grid in multiple \
feature levels.
"""
multi_level_base_anchors = []
for i, base_size in enumerate(self.base_sizes):
center = None
if self.centers is not None:
center = self.centers[i]
multi_level_base_anchors.append(
self.gen_single_level_base_anchors(
base_size,
scales=self.scales,
ratios=self.ratios,
center=center))
return multi_level_base_anchors
def gen_single_level_base_anchors(self,
base_size,
scales,
ratios,
center=None):
"""Generate base anchors of a single level.
Args:
base_size (int | float): Basic size of an anchor.
scales (torch.Tensor): Scales of the anchor.
ratios (torch.Tensor): The ratio between between the height
and width of anchors in a single level.
center (tuple[float], optional): The center of the base anchor
related to a single feature grid. Defaults to None.
Returns:
torch.Tensor: Anchors in a single-level feature maps.
"""
w = base_size
h = base_size
if center is None:
x_center = self.center_offset * w
y_center = self.center_offset * h
else:
x_center, y_center = center
h_ratios = torch.sqrt(ratios)
w_ratios = 1 / h_ratios
if self.scale_major:
ws = (w * w_ratios[:, None] * scales[None, :]).view(-1)
hs = (h * h_ratios[:, None] * scales[None, :]).view(-1)
else:
ws = (w * scales[:, None] * w_ratios[None, :]).view(-1)
hs = (h * scales[:, None] * h_ratios[None, :]).view(-1)
# use float anchor and the anchor's center is aligned with the
# pixel center
base_anchors = [
x_center - 0.5 * ws, y_center - 0.5 * hs, x_center + 0.5 * ws,
y_center + 0.5 * hs
]
base_anchors = torch.stack(base_anchors, dim=-1)
return base_anchors
def _meshgrid(self, x, y, row_major=True):
"""Generate mesh grid of x and y.
Args:
x (torch.Tensor): Grids of x dimension.
y (torch.Tensor): Grids of y dimension.
row_major (bool, optional): Whether to return y grids first.
Defaults to True.
Returns:
tuple[torch.Tensor]: The mesh grids of x and y.
"""
# use shape instead of len to keep tracing while exporting to onnx
xx = x.repeat(y.shape[0])
yy = y.view(-1, 1).repeat(1, x.shape[0]).view(-1)
if row_major:
return xx, yy
else:
return yy, xx
def grid_priors(self, featmap_sizes, dtype=torch.float32, device='cuda'):
"""Generate grid anchors in multiple feature levels.
Args:
featmap_sizes (list[tuple]): List of feature map sizes in
multiple feature levels.
dtype (:obj:`torch.dtype`): Dtype of priors.
Default: torch.float32.
device (str): The device where the anchors will be put on.
Return:
list[torch.Tensor]: Anchors in multiple feature levels. \
The sizes of each tensor should be [N, 4], where \
N = width * height * num_base_anchors, width and height \
are the sizes of the corresponding feature level, \
num_base_anchors is the number of anchors for that level.
"""
assert self.num_levels == len(featmap_sizes)
multi_level_anchors = []
for i in range(self.num_levels):
anchors = self.single_level_grid_priors(
featmap_sizes[i], level_idx=i, dtype=dtype, device=device)
multi_level_anchors.append(anchors)
return multi_level_anchors
def single_level_grid_priors(self,
featmap_size,
level_idx,
dtype=torch.float32,
device='cuda'):
"""Generate grid anchors of a single level.
Note:
This function is usually called by method ``self.grid_priors``.
Args:
featmap_size (tuple[int]): Size of the feature maps.
level_idx (int): The index of corresponding feature map level.
dtype (obj:`torch.dtype`): Date type of points.Defaults to
``torch.float32``.
device (str, optional): The device the tensor will be put on.
Defaults to 'cuda'.
Returns:
torch.Tensor: Anchors in the overall feature maps.
"""
base_anchors = self.base_anchors[level_idx].to(device).to(dtype)
feat_h, feat_w = featmap_size
stride_w, stride_h = self.strides[level_idx]
# First create Range with the default dtype, than convert to
# target `dtype` for onnx exporting.
shift_x = torch.arange(0, feat_w, device=device).to(dtype) * stride_w
shift_y = torch.arange(0, feat_h, device=device).to(dtype) * stride_h
shift_xx, shift_yy = self._meshgrid(shift_x, shift_y)
shifts = torch.stack([shift_xx, shift_yy, shift_xx, shift_yy], dim=-1)
# first feat_w elements correspond to the first row of shifts
# add A anchors (1, A, 4) to K shifts (K, 1, 4) to get
# shifted anchors (K, A, 4), reshape to (K*A, 4)
all_anchors = base_anchors[None, :, :] + shifts[:, None, :]
all_anchors = all_anchors.view(-1, 4)
# first A rows correspond to A anchors of (0, 0) in feature map,
# then (0, 1), (0, 2), ...
return all_anchors
def sparse_priors(self,
prior_idxs,
featmap_size,
level_idx,
dtype=torch.float32,
device='cuda'):
"""Generate sparse anchors according to the ``prior_idxs``.
Args:
prior_idxs (Tensor): The index of corresponding anchors
in the feature map.
featmap_size (tuple[int]): feature map size arrange as (h, w).
level_idx (int): The level index of corresponding feature
map.
dtype (obj:`torch.dtype`): Date type of points.Defaults to
``torch.float32``.
device (obj:`torch.device`): The device where the points is
located.
Returns:
Tensor: Anchor with shape (N, 4), N should be equal to
the length of ``prior_idxs``.
"""
height, width = featmap_size
num_base_anchors = self.num_base_anchors[level_idx]
base_anchor_id = prior_idxs % num_base_anchors
x = (prior_idxs //
num_base_anchors) % width * self.strides[level_idx][0]
y = (prior_idxs // width //
num_base_anchors) % height * self.strides[level_idx][1]
priors = torch.stack([x, y, x, y], 1).to(dtype).to(device) + \
self.base_anchors[level_idx][base_anchor_id, :].to(device)
return priors
def grid_anchors(self, featmap_sizes, device='cuda'):
"""Generate grid anchors in multiple feature levels.
Args:
featmap_sizes (list[tuple]): List of feature map sizes in
multiple feature levels.
device (str): Device where the anchors will be put on.
Return:
list[torch.Tensor]: Anchors in multiple feature levels. \
The sizes of each tensor should be [N, 4], where \
N = width * height * num_base_anchors, width and height \
are the sizes of the corresponding feature level, \
num_base_anchors is the number of anchors for that level.
"""
warnings.warn('``grid_anchors`` would be deprecated soon. '
'Please use ``grid_priors`` ')
assert self.num_levels == len(featmap_sizes)
multi_level_anchors = []
for i in range(self.num_levels):
anchors = self.single_level_grid_anchors(
self.base_anchors[i].to(device),
featmap_sizes[i],
self.strides[i],
device=device)
multi_level_anchors.append(anchors)
return multi_level_anchors
def single_level_grid_anchors(self,
base_anchors,
featmap_size,
stride=(16, 16),
device='cuda'):
"""Generate grid anchors of a single level.
Note:
This function is usually called by method ``self.grid_anchors``.
Args:
base_anchors (torch.Tensor): The base anchors of a feature grid.
featmap_size (tuple[int]): Size of the feature maps.
stride (tuple[int], optional): Stride of the feature map in order
(w, h). Defaults to (16, 16).
device (str, optional): Device the tensor will be put on.
Defaults to 'cuda'.
Returns:
torch.Tensor: Anchors in the overall feature maps.
"""
warnings.warn(
'``single_level_grid_anchors`` would be deprecated soon. '
'Please use ``single_level_grid_priors`` ')
# keep featmap_size as Tensor instead of int, so that we
# can convert to ONNX correctly
feat_h, feat_w = featmap_size
shift_x = torch.arange(0, feat_w, device=device) * stride[0]
shift_y = torch.arange(0, feat_h, device=device) * stride[1]
shift_xx, shift_yy = self._meshgrid(shift_x, shift_y)
shifts = torch.stack([shift_xx, shift_yy, shift_xx, shift_yy], dim=-1)
shifts = shifts.type_as(base_anchors)
# first feat_w elements correspond to the first row of shifts
# add A anchors (1, A, 4) to K shifts (K, 1, 4) to get
# shifted anchors (K, A, 4), reshape to (K*A, 4)
all_anchors = base_anchors[None, :, :] + shifts[:, None, :]
all_anchors = all_anchors.view(-1, 4)
# first A rows correspond to A anchors of (0, 0) in feature map,
# then (0, 1), (0, 2), ...
return all_anchors
def valid_flags(self, featmap_sizes, pad_shape, device='cuda'):
"""Generate valid flags of anchors in multiple feature levels.
Args:
featmap_sizes (list(tuple)): List of feature map sizes in
multiple feature levels.
pad_shape (tuple): The padded shape of the image.
device (str): Device where the anchors will be put on.
Return:
list(torch.Tensor): Valid flags of anchors in multiple levels.
"""
assert self.num_levels == len(featmap_sizes)
multi_level_flags = []
for i in range(self.num_levels):
anchor_stride = self.strides[i]
feat_h, feat_w = featmap_sizes[i]
h, w = pad_shape[:2]
valid_feat_h = min(int(np.ceil(h / anchor_stride[1])), feat_h)
valid_feat_w = min(int(np.ceil(w / anchor_stride[0])), feat_w)
flags = self.single_level_valid_flags((feat_h, feat_w),
(valid_feat_h, valid_feat_w),
self.num_base_anchors[i],
device=device)
multi_level_flags.append(flags)
return multi_level_flags
def single_level_valid_flags(self,
featmap_size,
valid_size,
num_base_anchors,
device='cuda'):
"""Generate the valid flags of anchor in a single feature map.
Args:
featmap_size (tuple[int]): The size of feature maps, arrange
as (h, w).
valid_size (tuple[int]): The valid size of the feature maps.
num_base_anchors (int): The number of base anchors.
device (str, optional): Device where the flags will be put on.
Defaults to 'cuda'.
Returns:
torch.Tensor: The valid flags of each anchor in a single level \
feature map.
"""
feat_h, feat_w = featmap_size
valid_h, valid_w = valid_size
assert valid_h <= feat_h and valid_w <= feat_w
valid_x = torch.zeros(feat_w, dtype=torch.bool, device=device)
valid_y = torch.zeros(feat_h, dtype=torch.bool, device=device)
valid_x[:valid_w] = 1
valid_y[:valid_h] = 1
valid_xx, valid_yy = self._meshgrid(valid_x, valid_y)
valid = valid_xx & valid_yy
valid = valid[:, None].expand(valid.size(0),
num_base_anchors).contiguous().view(-1)
return valid
def __repr__(self):
"""str: a string that describes the module"""
indent_str = ' '
repr_str = self.__class__.__name__ + '(\n'
repr_str += f'{indent_str}strides={self.strides},\n'
repr_str += f'{indent_str}ratios={self.ratios},\n'
repr_str += f'{indent_str}scales={self.scales},\n'
repr_str += f'{indent_str}base_sizes={self.base_sizes},\n'
repr_str += f'{indent_str}scale_major={self.scale_major},\n'
repr_str += f'{indent_str}octave_base_scale='
repr_str += f'{self.octave_base_scale},\n'
repr_str += f'{indent_str}scales_per_octave='
repr_str += f'{self.scales_per_octave},\n'
repr_str += f'{indent_str}num_levels={self.num_levels}\n'
repr_str += f'{indent_str}centers={self.centers},\n'
repr_str += f'{indent_str}center_offset={self.center_offset})'
return repr_str
@PRIOR_GENERATORS.register_module()
class SSDAnchorGenerator(AnchorGenerator):
"""Anchor generator for SSD.
Args:
strides (list[int] | list[tuple[int, int]]): Strides of anchors
in multiple feature levels.
ratios (list[float]): The list of ratios between the height and width
of anchors in a single level.
min_sizes (list[float]): The list of minimum anchor sizes on each
level.
max_sizes (list[float]): The list of maximum anchor sizes on each
level.
basesize_ratio_range (tuple(float)): Ratio range of anchors. Being
used when not setting min_sizes and max_sizes.
input_size (int): Size of feature map, 300 for SSD300, 512 for
SSD512. Being used when not setting min_sizes and max_sizes.
scale_major (bool): Whether to multiply scales first when generating
base anchors. If true, the anchors in the same row will have the
same scales. It is always set to be False in SSD.
"""
def __init__(self,
strides,
ratios,
min_sizes=None,
max_sizes=None,
basesize_ratio_range=(0.15, 0.9),
input_size=300,
scale_major=True):
assert len(strides) == len(ratios)
assert not (min_sizes is None) ^ (max_sizes is None)
self.strides = [_pair(stride) for stride in strides]
self.centers = [(stride[0] / 2., stride[1] / 2.)
for stride in self.strides]
if min_sizes is None and max_sizes is None:
# use hard code to generate SSD anchors
self.input_size = input_size
assert mmcv.is_tuple_of(basesize_ratio_range, float)
self.basesize_ratio_range = basesize_ratio_range
# calculate anchor ratios and sizes
min_ratio, max_ratio = basesize_ratio_range
min_ratio = int(min_ratio * 100)
max_ratio = int(max_ratio * 100)
step = int(np.floor(max_ratio - min_ratio) / (self.num_levels - 2))
min_sizes = []
max_sizes = []
for ratio in range(int(min_ratio), int(max_ratio) + 1, step):
min_sizes.append(int(self.input_size * ratio / 100))
max_sizes.append(int(self.input_size * (ratio + step) / 100))
if self.input_size == 300:
if basesize_ratio_range[0] == 0.15: # SSD300 COCO
min_sizes.insert(0, int(self.input_size * 7 / 100))
max_sizes.insert(0, int(self.input_size * 15 / 100))
elif basesize_ratio_range[0] == 0.2: # SSD300 VOC
min_sizes.insert(0, int(self.input_size * 10 / 100))
max_sizes.insert(0, int(self.input_size * 20 / 100))
else:
raise ValueError(
'basesize_ratio_range[0] should be either 0.15'
'or 0.2 when input_size is 300, got '
f'{basesize_ratio_range[0]}.')
elif self.input_size == 512:
if basesize_ratio_range[0] == 0.1: # SSD512 COCO
min_sizes.insert(0, int(self.input_size * 4 / 100))
max_sizes.insert(0, int(self.input_size * 10 / 100))
elif basesize_ratio_range[0] == 0.15: # SSD512 VOC
min_sizes.insert(0, int(self.input_size * 7 / 100))
max_sizes.insert(0, int(self.input_size * 15 / 100))
else:
raise ValueError(
'When not setting min_sizes and max_sizes,'
'basesize_ratio_range[0] should be either 0.1'
'or 0.15 when input_size is 512, got'
f' {basesize_ratio_range[0]}.')
else:
raise ValueError(
'Only support 300 or 512 in SSDAnchorGenerator when '
'not setting min_sizes and max_sizes, '
f'got {self.input_size}.')
assert len(min_sizes) == len(max_sizes) == len(strides)
anchor_ratios = []
anchor_scales = []
for k in range(len(self.strides)):
scales = [1., np.sqrt(max_sizes[k] / min_sizes[k])]
anchor_ratio = [1.]
for r in ratios[k]:
anchor_ratio += [1 / r, r] # 4 or 6 ratio
anchor_ratios.append(torch.Tensor(anchor_ratio))
anchor_scales.append(torch.Tensor(scales))
self.base_sizes = min_sizes
self.scales = anchor_scales
self.ratios = anchor_ratios
self.scale_major = scale_major
self.center_offset = 0
self.base_anchors = self.gen_base_anchors()
def gen_base_anchors(self):
"""Generate base anchors.
Returns:
list(torch.Tensor): Base anchors of a feature grid in multiple \
feature levels.
"""
multi_level_base_anchors = []
for i, base_size in enumerate(self.base_sizes):
base_anchors = self.gen_single_level_base_anchors(
base_size,
scales=self.scales[i],
ratios=self.ratios[i],
center=self.centers[i])
indices = list(range(len(self.ratios[i])))
indices.insert(1, len(indices))
base_anchors = torch.index_select(base_anchors, 0,
torch.LongTensor(indices))
multi_level_base_anchors.append(base_anchors)
return multi_level_base_anchors
def __repr__(self):
"""str: a string that describes the module"""
indent_str = ' '
repr_str = self.__class__.__name__ + '(\n'
repr_str += f'{indent_str}strides={self.strides},\n'
repr_str += f'{indent_str}scales={self.scales},\n'
repr_str += f'{indent_str}scale_major={self.scale_major},\n'
repr_str += f'{indent_str}input_size={self.input_size},\n'
repr_str += f'{indent_str}scales={self.scales},\n'
repr_str += f'{indent_str}ratios={self.ratios},\n'
repr_str += f'{indent_str}num_levels={self.num_levels},\n'
repr_str += f'{indent_str}base_sizes={self.base_sizes},\n'
repr_str += f'{indent_str}basesize_ratio_range='
repr_str += f'{self.basesize_ratio_range})'
return repr_str
@PRIOR_GENERATORS.register_module()
class LegacyAnchorGenerator(AnchorGenerator):
"""Legacy anchor generator used in MMDetection V1.x.
Note:
Difference to the V2.0 anchor generator:
1. The center offset of V1.x anchors are set to be 0.5 rather than 0.
2. The width/height are minused by 1 when calculating the anchors' \
centers and corners to meet the V1.x coordinate system.
3. The anchors' corners are quantized.
Args:
strides (list[int] | list[tuple[int]]): Strides of anchors
in multiple feature levels.
ratios (list[float]): The list of ratios between the height and width
of anchors in a single level.
scales (list[int] | None): Anchor scales for anchors in a single level.
It cannot be set at the same time if `octave_base_scale` and
`scales_per_octave` are set.
base_sizes (list[int]): The basic sizes of anchors in multiple levels.
If None is given, strides will be used to generate base_sizes.
scale_major (bool): Whether to multiply scales first when generating
base anchors. If true, the anchors in the same row will have the
same scales. By default it is True in V2.0
octave_base_scale (int): The base scale of octave.
scales_per_octave (int): Number of scales for each octave.
`octave_base_scale` and `scales_per_octave` are usually used in
retinanet and the `scales` should be None when they are set.
centers (list[tuple[float, float]] | None): The centers of the anchor
relative to the feature grid center in multiple feature levels.
By default it is set to be None and not used. It a list of float
is given, this list will be used to shift the centers of anchors.
center_offset (float): The offset of center in proportion to anchors'
width and height. By default it is 0.5 in V2.0 but it should be 0.5
in v1.x models.
Examples:
>>> from mmdet.core import LegacyAnchorGenerator
>>> self = LegacyAnchorGenerator(
>>> [16], [1.], [1.], [9], center_offset=0.5)
>>> all_anchors = self.grid_anchors(((2, 2),), device='cpu')
>>> print(all_anchors)
[tensor([[ 0., 0., 8., 8.],
[16., 0., 24., 8.],
[ 0., 16., 8., 24.],
[16., 16., 24., 24.]])]
"""
def gen_single_level_base_anchors(self,
base_size,
scales,
ratios,
center=None):
"""Generate base anchors of a single level.
Note:
The width/height of anchors are minused by 1 when calculating \
the centers and corners to meet the V1.x coordinate system.
Args:
base_size (int | float): Basic size of an anchor.
scales (torch.Tensor): Scales of the anchor.
ratios (torch.Tensor): The ratio between between the height.
and width of anchors in a single level.
center (tuple[float], optional): The center of the base anchor
related to a single feature grid. Defaults to None.
Returns:
torch.Tensor: Anchors in a single-level feature map.
"""
w = base_size
h = base_size
if center is None:
x_center = self.center_offset * (w - 1)
y_center = self.center_offset * (h - 1)
else:
x_center, y_center = center
h_ratios = torch.sqrt(ratios)
w_ratios = 1 / h_ratios
if self.scale_major:
ws = (w * w_ratios[:, None] * scales[None, :]).view(-1)
hs = (h * h_ratios[:, None] * scales[None, :]).view(-1)
else:
ws = (w * scales[:, None] * w_ratios[None, :]).view(-1)
hs = (h * scales[:, None] * h_ratios[None, :]).view(-1)
# use float anchor and the anchor's center is aligned with the
# pixel center
base_anchors = [
x_center - 0.5 * (ws - 1), y_center - 0.5 * (hs - 1),
x_center + 0.5 * (ws - 1), y_center + 0.5 * (hs - 1)
]
base_anchors = torch.stack(base_anchors, dim=-1).round()
return base_anchors
@PRIOR_GENERATORS.register_module()
class LegacySSDAnchorGenerator(SSDAnchorGenerator, LegacyAnchorGenerator):
"""Legacy anchor generator used in MMDetection V1.x.
The difference between `LegacySSDAnchorGenerator` and `SSDAnchorGenerator`
can be found in `LegacyAnchorGenerator`.
"""
def __init__(self,
strides,
ratios,
basesize_ratio_range,
input_size=300,
scale_major=True):
super(LegacySSDAnchorGenerator, self).__init__(
strides=strides,
ratios=ratios,
basesize_ratio_range=basesize_ratio_range,
input_size=input_size,
scale_major=scale_major)
self.centers = [((stride - 1) / 2., (stride - 1) / 2.)
for stride in strides]
self.base_anchors = self.gen_base_anchors()
@PRIOR_GENERATORS.register_module()
class YOLOAnchorGenerator(AnchorGenerator):
"""Anchor generator for YOLO.
Args:
strides (list[int] | list[tuple[int, int]]): Strides of anchors
in multiple feature levels.
base_sizes (list[list[tuple[int, int]]]): The basic sizes
of anchors in multiple levels.
"""
def __init__(self, strides, base_sizes):
self.strides = [_pair(stride) for stride in strides]
self.centers = [(stride[0] / 2., stride[1] / 2.)
for stride in self.strides]
self.base_sizes = []
num_anchor_per_level = len(base_sizes[0])
for base_sizes_per_level in base_sizes:
assert num_anchor_per_level == len(base_sizes_per_level)
self.base_sizes.append(
[_pair(base_size) for base_size in base_sizes_per_level])
self.base_anchors = self.gen_base_anchors()
@property
def num_levels(self):
"""int: number of feature levels that the generator will be applied"""
return len(self.base_sizes)
def gen_base_anchors(self):
"""Generate base anchors.
Returns:
list(torch.Tensor): Base anchors of a feature grid in multiple \
feature levels.
"""
multi_level_base_anchors = []
for i, base_sizes_per_level in enumerate(self.base_sizes):
center = None
if self.centers is not None:
center = self.centers[i]
multi_level_base_anchors.append(
self.gen_single_level_base_anchors(base_sizes_per_level,
center))
return multi_level_base_anchors
def gen_single_level_base_anchors(self, base_sizes_per_level, center=None):
"""Generate base anchors of a single level.
Args:
base_sizes_per_level (list[tuple[int, int]]): Basic sizes of
anchors.
center (tuple[float], optional): The center of the base anchor
related to a single feature grid. Defaults to None.
Returns:
torch.Tensor: Anchors in a single-level feature maps.
"""
x_center, y_center = center
base_anchors = []
for base_size in base_sizes_per_level:
w, h = base_size
# use float anchor and the anchor's center is aligned with the
# pixel center
base_anchor = torch.Tensor([
x_center - 0.5 * w, y_center - 0.5 * h, x_center + 0.5 * w,
y_center + 0.5 * h
])
base_anchors.append(base_anchor)
base_anchors = torch.stack(base_anchors, dim=0)
return base_anchors
def responsible_flags(self, featmap_sizes, gt_bboxes, device='cuda'):
"""Generate responsible anchor flags of grid cells in multiple scales.
Args:
featmap_sizes (list(tuple)): List of feature map sizes in multiple
feature levels.
gt_bboxes (Tensor): Ground truth boxes, shape (n, 4).
device (str): Device where the anchors will be put on.
Return:
list(torch.Tensor): responsible flags of anchors in multiple level
"""
assert self.num_levels == len(featmap_sizes)
multi_level_responsible_flags = []
for i in range(self.num_levels):
anchor_stride = self.strides[i]
flags = self.single_level_responsible_flags(
featmap_sizes[i],
gt_bboxes,
anchor_stride,
self.num_base_anchors[i],
device=device)
multi_level_responsible_flags.append(flags)
return multi_level_responsible_flags
def single_level_responsible_flags(self,
featmap_size,
gt_bboxes,
stride,
num_base_anchors,
device='cuda'):
"""Generate the responsible flags of anchor in a single feature map.
Args:
featmap_size (tuple[int]): The size of feature maps.
gt_bboxes (Tensor): Ground truth boxes, shape (n, 4).
stride (tuple(int)): stride of current level
num_base_anchors (int): The number of base anchors.
device (str, optional): Device where the flags will be put on.
Defaults to 'cuda'.
Returns:
torch.Tensor: The valid flags of each anchor in a single level \
feature map.
"""
feat_h, feat_w = featmap_size
gt_bboxes_cx = ((gt_bboxes[:, 0] + gt_bboxes[:, 2]) * 0.5).to(device)
gt_bboxes_cy = ((gt_bboxes[:, 1] + gt_bboxes[:, 3]) * 0.5).to(device)
gt_bboxes_grid_x = torch.floor(gt_bboxes_cx / stride[0]).long()
gt_bboxes_grid_y = torch.floor(gt_bboxes_cy / stride[1]).long()
# row major indexing
gt_bboxes_grid_idx = gt_bboxes_grid_y * feat_w + gt_bboxes_grid_x
responsible_grid = torch.zeros(
feat_h * feat_w, dtype=torch.uint8, device=device)
responsible_grid[gt_bboxes_grid_idx] = 1
responsible_grid = responsible_grid[:, None].expand(
responsible_grid.size(0), num_base_anchors).contiguous().view(-1)
return responsible_grid
| 37,205 | 41.913495 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/anchor/utils.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import torch
def images_to_levels(target, num_levels):
"""Convert targets by image to targets by feature level.
[target_img0, target_img1] -> [target_level0, target_level1, ...]
"""
target = torch.stack(target, 0)
level_targets = []
start = 0
for n in num_levels:
end = start + n
# level_targets.append(target[:, start:end].squeeze(0))
level_targets.append(target[:, start:end])
start = end
return level_targets
def anchor_inside_flags(flat_anchors,
valid_flags,
img_shape,
allowed_border=0):
"""Check whether the anchors are inside the border.
Args:
flat_anchors (torch.Tensor): Flatten anchors, shape (n, 4).
valid_flags (torch.Tensor): An existing valid flags of anchors.
img_shape (tuple(int)): Shape of current image.
allowed_border (int, optional): The border to allow the valid anchor.
Defaults to 0.
Returns:
torch.Tensor: Flags indicating whether the anchors are inside a \
valid range.
"""
img_h, img_w = img_shape[:2]
if allowed_border >= 0:
inside_flags = valid_flags & \
(flat_anchors[:, 0] >= -allowed_border) & \
(flat_anchors[:, 1] >= -allowed_border) & \
(flat_anchors[:, 2] < img_w + allowed_border) & \
(flat_anchors[:, 3] < img_h + allowed_border)
else:
inside_flags = valid_flags
return inside_flags
def calc_region(bbox, ratio, featmap_size=None):
"""Calculate a proportional bbox region.
The bbox center are fixed and the new h' and w' is h * ratio and w * ratio.
Args:
bbox (Tensor): Bboxes to calculate regions, shape (n, 4).
ratio (float): Ratio of the output region.
featmap_size (tuple): Feature map size used for clipping the boundary.
Returns:
tuple: x1, y1, x2, y2
"""
x1 = torch.round((1 - ratio) * bbox[0] + ratio * bbox[2]).long()
y1 = torch.round((1 - ratio) * bbox[1] + ratio * bbox[3]).long()
x2 = torch.round(ratio * bbox[0] + (1 - ratio) * bbox[2]).long()
y2 = torch.round(ratio * bbox[1] + (1 - ratio) * bbox[3]).long()
if featmap_size is not None:
x1 = x1.clamp(min=0, max=featmap_size[1])
y1 = y1.clamp(min=0, max=featmap_size[0])
x2 = x2.clamp(min=0, max=featmap_size[1])
y2 = y2.clamp(min=0, max=featmap_size[0])
return (x1, y1, x2, y2)
| 2,545 | 33.876712 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/anchor/__init__.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from .anchor_generator import (AnchorGenerator, LegacyAnchorGenerator,
YOLOAnchorGenerator)
from .builder import (ANCHOR_GENERATORS, PRIOR_GENERATORS,
build_anchor_generator, build_prior_generator)
from .point_generator import MlvlPointGenerator, PointGenerator
from .utils import anchor_inside_flags, calc_region, images_to_levels
__all__ = [
'AnchorGenerator', 'LegacyAnchorGenerator', 'anchor_inside_flags',
'PointGenerator', 'images_to_levels', 'calc_region',
'build_anchor_generator', 'ANCHOR_GENERATORS', 'YOLOAnchorGenerator',
'build_prior_generator', 'PRIOR_GENERATORS', 'MlvlPointGenerator'
]
| 720 | 47.066667 | 73 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/core/anchor/builder.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import warnings
from mmcv.utils import Registry, build_from_cfg
PRIOR_GENERATORS = Registry('Generator for anchors and points')
ANCHOR_GENERATORS = PRIOR_GENERATORS
def build_prior_generator(cfg, default_args=None):
return build_from_cfg(cfg, PRIOR_GENERATORS, default_args)
def build_anchor_generator(cfg, default_args=None):
warnings.warn(
'``build_anchor_generator`` would be deprecated soon, please use '
'``build_prior_generator`` ')
return build_prior_generator(cfg, default_args=default_args)
| 583 | 28.2 | 74 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/__init__.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from .backbones import * # noqa: F401,F403
from .builder import (BACKBONES, DETECTORS, HEADS, LOSSES, NECKS,
ROI_EXTRACTORS, SHARED_HEADS, build_backbone,
build_detector, build_head, build_loss, build_neck,
build_roi_extractor, build_shared_head)
from .dense_heads import * # noqa: F401,F403
from .detectors import * # noqa: F401,F403
from .losses import * # noqa: F401,F403
from .necks import * # noqa: F401,F403
from .plugins import * # noqa: F401,F403
from .roi_heads import * # noqa: F401,F403
from .seg_heads import * # noqa: F401,F403
__all__ = [
'BACKBONES', 'NECKS', 'ROI_EXTRACTORS', 'SHARED_HEADS', 'HEADS', 'LOSSES',
'DETECTORS', 'build_backbone', 'build_neck', 'build_roi_extractor',
'build_shared_head', 'build_head', 'build_loss', 'build_detector'
]
| 899 | 44 | 78 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/builder.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import warnings
from mmcv.cnn import MODELS as MMCV_MODELS
from mmcv.utils import Registry
MODELS = Registry('models', parent=MMCV_MODELS)
BACKBONES = MODELS
NECKS = MODELS
ROI_EXTRACTORS = MODELS
SHARED_HEADS = MODELS
HEADS = MODELS
LOSSES = MODELS
DETECTORS = MODELS
def build_backbone(cfg):
"""Build backbone."""
return BACKBONES.build(cfg)
def build_neck(cfg):
"""Build neck."""
return NECKS.build(cfg)
def build_roi_extractor(cfg):
"""Build roi extractor."""
return ROI_EXTRACTORS.build(cfg)
def build_shared_head(cfg):
"""Build shared head."""
return SHARED_HEADS.build(cfg)
def build_head(cfg):
"""Build head."""
return HEADS.build(cfg)
def build_loss(cfg):
"""Build loss."""
return LOSSES.build(cfg)
def build_detector(cfg, train_cfg=None, test_cfg=None):
"""Build detector."""
if train_cfg is not None or test_cfg is not None:
warnings.warn(
'train_cfg and test_cfg is deprecated, '
'please specify them in model', UserWarning)
assert cfg.get('train_cfg') is None or train_cfg is None, \
'train_cfg specified in both outer field and model field '
assert cfg.get('test_cfg') is None or test_cfg is None, \
'test_cfg specified in both outer field and model field '
return DETECTORS.build(
cfg, default_args=dict(train_cfg=train_cfg, test_cfg=test_cfg))
| 1,449 | 23.166667 | 71 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/solo.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .single_stage_instance_seg import SingleStageInstanceSegmentor
@DETECTORS.register_module()
class SOLO(SingleStageInstanceSegmentor):
"""`SOLO: Segmenting Objects by Locations
<https://arxiv.org/abs/1912.04488>`_
"""
def __init__(self,
backbone,
neck=None,
bbox_head=None,
mask_head=None,
train_cfg=None,
test_cfg=None,
init_cfg=None,
pretrained=None):
super().__init__(
backbone=backbone,
neck=neck,
bbox_head=bbox_head,
mask_head=mask_head,
train_cfg=train_cfg,
test_cfg=test_cfg,
init_cfg=init_cfg,
pretrained=pretrained)
| 870 | 27.096774 | 67 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/yolox.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import random
import torch
import torch.distributed as dist
import torch.nn.functional as F
from mmcv.runner import get_dist_info
from ..builder import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module()
class YOLOX(SingleStageDetector):
r"""Implementation of `YOLOX: Exceeding YOLO Series in 2021
<https://arxiv.org/abs/2107.08430>`_
Note: Considering the trade-off between training speed and accuracy,
multi-scale training is temporarily kept. More elegant implementation
will be adopted in the future.
Args:
backbone (nn.Module): The backbone module.
neck (nn.Module): The neck module.
bbox_head (nn.Module): The bbox head module.
train_cfg (obj:`ConfigDict`, optional): The training config
of YOLOX. Default: None.
test_cfg (obj:`ConfigDict`, optional): The testing config
of YOLOX. Default: None.
pretrained (str, optional): model pretrained path.
Default: None.
input_size (tuple): The model default input image size.
Default: (640, 640).
size_multiplier (int): Image size multiplication factor.
Default: 32.
random_size_range (tuple): The multi-scale random range during
multi-scale training. The real training image size will
be multiplied by size_multiplier. Default: (15, 25).
random_size_interval (int): The iter interval of change
image size. Default: 10.
init_cfg (dict, optional): Initialization config dict.
Default: None.
"""
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None,
input_size=(640, 640),
size_multiplier=32,
random_size_range=(15, 25),
random_size_interval=10,
init_cfg=None):
super(YOLOX, self).__init__(backbone, neck, bbox_head, train_cfg,
test_cfg, pretrained, init_cfg)
self.rank, self.world_size = get_dist_info()
self._default_input_size = input_size
self._input_size = input_size
self._random_size_range = random_size_range
self._random_size_interval = random_size_interval
self._size_multiplier = size_multiplier
self._progress_in_iter = 0
def forward_train(self,
img,
img_metas,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None):
"""
Args:
img (Tensor): Input images of shape (N, C, H, W).
Typically these should be mean centered and std scaled.
img_metas (list[dict]): A List of image info dict where each dict
has: 'img_shape', 'scale_factor', 'flip', and may also contain
'filename', 'ori_shape', 'pad_shape', and 'img_norm_cfg'.
For details on the values of these keys see
:class:`mmdet.datasets.pipelines.Collect`.
gt_bboxes (list[Tensor]): Each item are the truth boxes for each
image in [tl_x, tl_y, br_x, br_y] format.
gt_labels (list[Tensor]): Class indices corresponding to each box
gt_bboxes_ignore (None | list[Tensor]): Specify which bounding
boxes can be ignored when computing the loss.
Returns:
dict[str, Tensor]: A dictionary of loss components.
"""
# Multi-scale training
img, gt_bboxes = self._preprocess(img, gt_bboxes)
losses = super(YOLOX, self).forward_train(img, img_metas, gt_bboxes,
gt_labels, gt_bboxes_ignore)
# random resizing
if (self._progress_in_iter + 1) % self._random_size_interval == 0:
self._input_size = self._random_resize()
self._progress_in_iter += 1
return losses
def _preprocess(self, img, gt_bboxes):
scale_y = self._input_size[0] / self._default_input_size[0]
scale_x = self._input_size[1] / self._default_input_size[1]
if scale_x != 1 or scale_y != 1:
img = F.interpolate(
img,
size=self._input_size,
mode='bilinear',
align_corners=False)
for gt_bbox in gt_bboxes:
gt_bbox[..., 0::2] = gt_bbox[..., 0::2] * scale_x
gt_bbox[..., 1::2] = gt_bbox[..., 1::2] * scale_y
return img, gt_bboxes
def _random_resize(self):
tensor = torch.LongTensor(2).cuda()
if self.rank == 0:
size = random.randint(*self._random_size_range)
aspect_ratio = float(
self._default_input_size[1]) / self._default_input_size[0]
size = (self._size_multiplier * size,
self._size_multiplier * int(aspect_ratio * size))
tensor[0] = size[0]
tensor[1] = size[1]
if self.world_size > 1:
dist.barrier()
dist.broadcast(tensor, 0)
input_size = (tensor[0].item(), tensor[1].item())
return input_size
| 5,360 | 38.711111 | 78 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/fsaf.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module()
class FSAF(SingleStageDetector):
"""Implementation of `FSAF <https://arxiv.org/abs/1903.00621>`_"""
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None,
init_cfg=None):
super(FSAF, self).__init__(backbone, neck, bbox_head, train_cfg,
test_cfg, pretrained, init_cfg)
| 635 | 30.8 | 72 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/two_stage.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import warnings
import torch
from ..builder import DETECTORS, build_backbone, build_head, build_neck
from .base import BaseDetector
@DETECTORS.register_module()
class TwoStageDetector(BaseDetector):
"""Base class for two-stage detectors.
Two-stage detectors typically consisting of a region proposal network and a
task-specific regression head.
"""
def __init__(self,
backbone,
neck=None,
rpn_head=None,
roi_head=None,
train_cfg=None,
test_cfg=None,
pretrained=None,
init_cfg=None):
super(TwoStageDetector, self).__init__(init_cfg)
if pretrained:
warnings.warn('DeprecationWarning: pretrained is deprecated, '
'please use "init_cfg" instead')
backbone.pretrained = pretrained
self.backbone = build_backbone(backbone)
if neck is not None:
self.neck = build_neck(neck)
if rpn_head is not None:
rpn_train_cfg = train_cfg.rpn if train_cfg is not None else None
rpn_head_ = rpn_head.copy()
rpn_head_.update(train_cfg=rpn_train_cfg, test_cfg=test_cfg.rpn)
self.rpn_head = build_head(rpn_head_)
if roi_head is not None:
# update train and test cfg here for now
# TODO: refactor assigner & sampler
rcnn_train_cfg = train_cfg.rcnn if train_cfg is not None else None
roi_head.update(train_cfg=rcnn_train_cfg)
roi_head.update(test_cfg=test_cfg.rcnn)
roi_head.pretrained = pretrained
self.roi_head = build_head(roi_head)
self.train_cfg = train_cfg
self.test_cfg = test_cfg
@property
def with_rpn(self):
"""bool: whether the detector has RPN"""
return hasattr(self, 'rpn_head') and self.rpn_head is not None
@property
def with_roi_head(self):
"""bool: whether the detector has a RoI head"""
return hasattr(self, 'roi_head') and self.roi_head is not None
def extract_feat(self, img):
"""Directly extract features from the backbone+neck."""
x = self.backbone(img)
if self.with_neck:
x = self.neck(x)
return x
def forward_dummy(self, img):
"""Used for computing network flops.
See `mmdetection/tools/analysis_tools/get_flops.py`
"""
outs = ()
# backbone
x = self.extract_feat(img)
# rpn
if self.with_rpn:
rpn_outs = self.rpn_head(x)
outs = outs + (rpn_outs, )
proposals = torch.randn(1000, 4).to(img.device)
# roi_head
roi_outs = self.roi_head.forward_dummy(x, proposals)
outs = outs + (roi_outs, )
return outs
def forward_train(self,
img,
img_metas,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None,
proposals=None,
**kwargs):
"""
Args:
img (Tensor): of shape (N, C, H, W) encoding input images.
Typically these should be mean centered and std scaled.
img_metas (list[dict]): list of image info dict where each dict
has: 'img_shape', 'scale_factor', 'flip', and may also contain
'filename', 'ori_shape', 'pad_shape', and 'img_norm_cfg'.
For details on the values of these keys see
`mmdet/datasets/pipelines/formatting.py:Collect`.
gt_bboxes (list[Tensor]): Ground truth bboxes for each image with
shape (num_gts, 4) in [tl_x, tl_y, br_x, br_y] format.
gt_labels (list[Tensor]): class indices corresponding to each box
gt_bboxes_ignore (None | list[Tensor]): specify which bounding
boxes can be ignored when computing the loss.
gt_masks (None | Tensor) : true segmentation masks for each box
used if the architecture supports a segmentation task.
proposals : override rpn proposals with custom proposals. Use when
`with_rpn` is False.
Returns:
dict[str, Tensor]: a dictionary of loss components
"""
x = self.extract_feat(img)
losses = dict()
# RPN forward and loss
if self.with_rpn:
proposal_cfg = self.train_cfg.get('rpn_proposal',
self.test_cfg.rpn)
rpn_losses, proposal_list = self.rpn_head.forward_train(
x,
img_metas,
gt_bboxes,
gt_labels=None,
gt_bboxes_ignore=gt_bboxes_ignore,
proposal_cfg=proposal_cfg,
**kwargs)
losses.update(rpn_losses)
else:
proposal_list = proposals
roi_losses = self.roi_head.forward_train(x, img_metas, proposal_list,
gt_bboxes, gt_labels,
gt_bboxes_ignore, gt_masks,
**kwargs)
losses.update(roi_losses)
return losses
async def async_simple_test(self,
img,
img_meta,
proposals=None,
rescale=False):
"""Async test without augmentation."""
assert self.with_bbox, 'Bbox head must be implemented.'
x = self.extract_feat(img)
if proposals is None:
proposal_list = await self.rpn_head.async_simple_test_rpn(
x, img_meta)
else:
proposal_list = proposals
return await self.roi_head.async_simple_test(
x, proposal_list, img_meta, rescale=rescale)
def simple_test(self, img, img_metas, proposals=None, rescale=False):
"""Test without augmentation."""
assert self.with_bbox, 'Bbox head must be implemented.'
x = self.extract_feat(img)
if proposals is None:
proposal_list = self.rpn_head.simple_test_rpn(x, img_metas)
else:
proposal_list = proposals
return self.roi_head.simple_test(
x, proposal_list, img_metas, rescale=rescale)
def aug_test(self, imgs, img_metas, rescale=False):
"""Test with augmentations.
If rescale is False, then returned bboxes and masks will fit the scale
of imgs[0].
"""
x = self.extract_feats(imgs)
proposal_list = self.rpn_head.aug_test_rpn(x, img_metas)
return self.roi_head.aug_test(
x, proposal_list, img_metas, rescale=rescale)
def onnx_export(self, img, img_metas):
img_shape = torch._shape_as_tensor(img)[2:]
img_metas[0]['img_shape_for_onnx'] = img_shape
x = self.extract_feat(img)
proposals = self.rpn_head.onnx_export(x, img_metas)
if hasattr(self.roi_head, 'onnx_export'):
return self.roi_head.onnx_export(x, proposals, img_metas)
else:
raise NotImplementedError(
f'{self.__class__.__name__} can not '
f'be exported to ONNX. Please refer to the '
f'list of supported models,'
f'https://mmdetection.readthedocs.io/en/latest/tutorials/pytorch2onnx.html#list-of-supported-models-exportable-to-onnx' # noqa E501
)
| 7,703 | 35.339623 | 148 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/base.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from abc import ABCMeta, abstractmethod
from collections import OrderedDict
import mmcv
import numpy as np
import torch
import torch.distributed as dist
from mmcv.runner import BaseModule, auto_fp16
from mmdet.core.visualization import imshow_det_bboxes
class BaseDetector(BaseModule, metaclass=ABCMeta):
"""Base class for detectors."""
def __init__(self, init_cfg=None):
super(BaseDetector, self).__init__(init_cfg)
self.fp16_enabled = False
@property
def with_neck(self):
"""bool: whether the detector has a neck"""
return hasattr(self, 'neck') and self.neck is not None
# TODO: these properties need to be carefully handled
# for both single stage & two stage detectors
@property
def with_shared_head(self):
"""bool: whether the detector has a shared head in the RoI Head"""
return hasattr(self, 'roi_head') and self.roi_head.with_shared_head
@property
def with_bbox(self):
"""bool: whether the detector has a bbox head"""
return ((hasattr(self, 'roi_head') and self.roi_head.with_bbox)
or (hasattr(self, 'bbox_head') and self.bbox_head is not None))
@property
def with_mask(self):
"""bool: whether the detector has a mask head"""
return ((hasattr(self, 'roi_head') and self.roi_head.with_mask)
or (hasattr(self, 'mask_head') and self.mask_head is not None))
@abstractmethod
def extract_feat(self, imgs):
"""Extract features from images."""
pass
def extract_feats(self, imgs):
"""Extract features from multiple images.
Args:
imgs (list[torch.Tensor]): A list of images. The images are
augmented from the same image but in different ways.
Returns:
list[torch.Tensor]: Features of different images
"""
assert isinstance(imgs, list)
return [self.extract_feat(img) for img in imgs]
def forward_train(self, imgs, img_metas, **kwargs):
"""
Args:
img (Tensor): of shape (N, C, H, W) encoding input images.
Typically these should be mean centered and std scaled.
img_metas (list[dict]): List of image info dict where each dict
has: 'img_shape', 'scale_factor', 'flip', and may also contain
'filename', 'ori_shape', 'pad_shape', and 'img_norm_cfg'.
For details on the values of these keys, see
:class:`mmdet.datasets.pipelines.Collect`.
kwargs (keyword arguments): Specific to concrete implementation.
"""
# NOTE the batched image size information may be useful, e.g.
# in DETR, this is needed for the construction of masks, which is
# then used for the transformer_head.
batch_input_shape = tuple(imgs[0].size()[-2:])
for img_meta in img_metas:
img_meta['batch_input_shape'] = batch_input_shape
async def async_simple_test(self, img, img_metas, **kwargs):
raise NotImplementedError
@abstractmethod
def simple_test(self, img, img_metas, **kwargs):
pass
@abstractmethod
def aug_test(self, imgs, img_metas, **kwargs):
"""Test function with test time augmentation."""
pass
async def aforward_test(self, *, img, img_metas, **kwargs):
for var, name in [(img, 'img'), (img_metas, 'img_metas')]:
if not isinstance(var, list):
raise TypeError(f'{name} must be a list, but got {type(var)}')
num_augs = len(img)
if num_augs != len(img_metas):
raise ValueError(f'num of augmentations ({len(img)}) '
f'!= num of image metas ({len(img_metas)})')
# TODO: remove the restriction of samples_per_gpu == 1 when prepared
samples_per_gpu = img[0].size(0)
assert samples_per_gpu == 1
if num_augs == 1:
return await self.async_simple_test(img[0], img_metas[0], **kwargs)
else:
raise NotImplementedError
def forward_test(self, imgs, img_metas, **kwargs):
"""
Args:
imgs (List[Tensor]): the outer list indicates test-time
augmentations and inner Tensor should have a shape NxCxHxW,
which contains all images in the batch.
img_metas (List[List[dict]]): the outer list indicates test-time
augs (multiscale, flip, etc.) and the inner list indicates
images in a batch.
"""
for var, name in [(imgs, 'imgs'), (img_metas, 'img_metas')]:
if not isinstance(var, list):
raise TypeError(f'{name} must be a list, but got {type(var)}')
num_augs = len(imgs)
if num_augs != len(img_metas):
raise ValueError(f'num of augmentations ({len(imgs)}) '
f'!= num of image meta ({len(img_metas)})')
# NOTE the batched image size information may be useful, e.g.
# in DETR, this is needed for the construction of masks, which is
# then used for the transformer_head.
for img, img_meta in zip(imgs, img_metas):
batch_size = len(img_meta)
for img_id in range(batch_size):
img_meta[img_id]['batch_input_shape'] = tuple(img.size()[-2:])
if num_augs == 1:
# proposals (List[List[Tensor]]): the outer list indicates
# test-time augs (multiscale, flip, etc.) and the inner list
# indicates images in a batch.
# The Tensor should have a shape Px4, where P is the number of
# proposals.
if 'proposals' in kwargs:
kwargs['proposals'] = kwargs['proposals'][0]
return self.simple_test(imgs[0], img_metas[0], **kwargs)
else:
assert imgs[0].size(0) == 1, 'aug test does not support ' \
'inference with batch size ' \
f'{imgs[0].size(0)}'
# TODO: support test augmentation for predefined proposals
assert 'proposals' not in kwargs
return self.aug_test(imgs, img_metas, **kwargs)
@auto_fp16(apply_to=('img', ))
def forward(self, img, img_metas, return_loss=True, **kwargs):
"""Calls either :func:`forward_train` or :func:`forward_test` depending
on whether ``return_loss`` is ``True``.
Note this setting will change the expected inputs. When
``return_loss=True``, img and img_meta are single-nested (i.e. Tensor
and List[dict]), and when ``resturn_loss=False``, img and img_meta
should be double nested (i.e. List[Tensor], List[List[dict]]), with
the outer list indicating test time augmentations.
"""
if torch.onnx.is_in_onnx_export():
assert len(img_metas) == 1
return self.onnx_export(img[0], img_metas[0])
if return_loss:
return self.forward_train(img, img_metas, **kwargs)
else:
return self.forward_test(img, img_metas, **kwargs)
def _parse_losses(self, losses):
"""Parse the raw outputs (losses) of the network.
Args:
losses (dict): Raw output of the network, which usually contain
losses and other necessary information.
Returns:
tuple[Tensor, dict]: (loss, log_vars), loss is the loss tensor \
which may be a weighted sum of all losses, log_vars contains \
all the variables to be sent to the logger.
"""
log_vars = OrderedDict()
for loss_name, loss_value in losses.items():
if isinstance(loss_value, torch.Tensor):
log_vars[loss_name] = loss_value.mean()
elif isinstance(loss_value, list):
log_vars[loss_name] = sum(_loss.mean() for _loss in loss_value)
else:
raise TypeError(
f'{loss_name} is not a tensor or list of tensors')
loss = sum(_value for _key, _value in log_vars.items()
if 'loss' in _key)
# If the loss_vars has different length, GPUs will wait infinitely
if dist.is_available() and dist.is_initialized():
log_var_length = torch.tensor(len(log_vars), device=loss.device)
dist.all_reduce(log_var_length)
message = (f'rank {dist.get_rank()}' +
f' len(log_vars): {len(log_vars)}' + ' keys: ' +
','.join(log_vars.keys()))
assert log_var_length == len(log_vars) * dist.get_world_size(), \
'loss log variables are different across GPUs!\n' + message
log_vars['loss'] = loss
for loss_name, loss_value in log_vars.items():
# reduce loss when distributed training
if dist.is_available() and dist.is_initialized():
loss_value = loss_value.data.clone()
dist.all_reduce(loss_value.div_(dist.get_world_size()))
log_vars[loss_name] = loss_value.item()
return loss, log_vars
def train_step(self, data, optimizer):
"""The iteration step during training.
This method defines an iteration step during training, except for the
back propagation and optimizer updating, which are done in an optimizer
hook. Note that in some complicated cases or models, the whole process
including back propagation and optimizer updating is also defined in
this method, such as GAN.
Args:
data (dict): The output of dataloader.
optimizer (:obj:`torch.optim.Optimizer` | dict): The optimizer of
runner is passed to ``train_step()``. This argument is unused
and reserved.
Returns:
dict: It should contain at least 3 keys: ``loss``, ``log_vars``, \
``num_samples``.
- ``loss`` is a tensor for back propagation, which can be a
weighted sum of multiple losses.
- ``log_vars`` contains all the variables to be sent to the
logger.
- ``num_samples`` indicates the batch size (when the model is
DDP, it means the batch size on each GPU), which is used for
averaging the logs.
"""
losses = self(**data)
loss, log_vars = self._parse_losses(losses)
outputs = dict(
loss=loss, log_vars=log_vars, num_samples=len(data['img_metas']))
return outputs
def val_step(self, data, optimizer=None):
"""The iteration step during validation.
This method shares the same signature as :func:`train_step`, but used
during val epochs. Note that the evaluation after training epochs is
not implemented with this method, but an evaluation hook.
"""
losses = self(**data)
loss, log_vars = self._parse_losses(losses)
outputs = dict(
loss=loss, log_vars=log_vars, num_samples=len(data['img_metas']))
return outputs
def show_result(self,
img,
result,
score_thr=0.3,
bbox_color=(72, 101, 241),
text_color=(72, 101, 241),
mask_color=None,
thickness=2,
font_size=13,
win_name='',
show=False,
wait_time=0,
out_file=None):
"""Draw `result` over `img`.
Args:
img (str or Tensor): The image to be displayed.
result (Tensor or tuple): The results to draw over `img`
bbox_result or (bbox_result, segm_result).
score_thr (float, optional): Minimum score of bboxes to be shown.
Default: 0.3.
bbox_color (str or tuple(int) or :obj:`Color`):Color of bbox lines.
The tuple of color should be in BGR order. Default: 'green'
text_color (str or tuple(int) or :obj:`Color`):Color of texts.
The tuple of color should be in BGR order. Default: 'green'
mask_color (None or str or tuple(int) or :obj:`Color`):
Color of masks. The tuple of color should be in BGR order.
Default: None
thickness (int): Thickness of lines. Default: 2
font_size (int): Font size of texts. Default: 13
win_name (str): The window name. Default: ''
wait_time (float): Value of waitKey param.
Default: 0.
show (bool): Whether to show the image.
Default: False.
out_file (str or None): The filename to write the image.
Default: None.
Returns:
img (Tensor): Only if not `show` or `out_file`
"""
img = mmcv.imread(img)
img = img.copy()
if isinstance(result, tuple):
bbox_result, segm_result = result
if isinstance(segm_result, tuple):
segm_result = segm_result[0] # ms rcnn
else:
bbox_result, segm_result = result, None
bboxes = np.vstack(bbox_result)
labels = [
np.full(bbox.shape[0], i, dtype=np.int32)
for i, bbox in enumerate(bbox_result)
]
labels = np.concatenate(labels)
# draw segmentation masks
segms = None
if segm_result is not None and len(labels) > 0: # non empty
segms = mmcv.concat_list(segm_result)
if isinstance(segms[0], torch.Tensor):
segms = torch.stack(segms, dim=0).detach().cpu().numpy()
else:
segms = np.stack(segms, axis=0)
# if out_file specified, do not show image in window
if out_file is not None:
show = False
# draw bounding boxes
img = imshow_det_bboxes(
img,
bboxes,
labels,
segms,
class_names=self.CLASSES,
score_thr=score_thr,
bbox_color=bbox_color,
text_color=text_color,
mask_color=mask_color,
thickness=thickness,
font_size=font_size,
win_name=win_name,
show=show,
wait_time=wait_time,
out_file=out_file)
if not (show or out_file):
return img
def onnx_export(self, img, img_metas):
raise NotImplementedError(f'{self.__class__.__name__} does '
f'not support ONNX EXPORT')
| 14,772 | 39.922438 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/single_stage.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import warnings
import torch
from mmdet.core import bbox2result
from ..builder import DETECTORS, build_backbone, build_head, build_neck
from .base import BaseDetector
@DETECTORS.register_module()
class SingleStageDetector(BaseDetector):
"""Base class for single-stage detectors.
Single-stage detectors directly and densely predict bounding boxes on the
output features of the backbone+neck.
"""
def __init__(self,
backbone,
neck=None,
bbox_head=None,
train_cfg=None,
test_cfg=None,
pretrained=None,
init_cfg=None):
super(SingleStageDetector, self).__init__(init_cfg)
if pretrained:
warnings.warn('DeprecationWarning: pretrained is deprecated, '
'please use "init_cfg" instead')
backbone.pretrained = pretrained
self.backbone = build_backbone(backbone)
if neck is not None:
self.neck = build_neck(neck)
bbox_head.update(train_cfg=train_cfg)
bbox_head.update(test_cfg=test_cfg)
self.bbox_head = build_head(bbox_head)
self.train_cfg = train_cfg
self.test_cfg = test_cfg
def extract_feat(self, img):
"""Directly extract features from the backbone+neck."""
x = self.backbone(img)
if self.with_neck:
x = self.neck(x)
return x
def forward_dummy(self, img):
"""Used for computing network flops.
See `mmdetection/tools/analysis_tools/get_flops.py`
"""
x = self.extract_feat(img)
outs = self.bbox_head(x)
return outs
def forward_train(self,
img,
img_metas,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None):
"""
Args:
img (Tensor): Input images of shape (N, C, H, W).
Typically these should be mean centered and std scaled.
img_metas (list[dict]): A List of image info dict where each dict
has: 'img_shape', 'scale_factor', 'flip', and may also contain
'filename', 'ori_shape', 'pad_shape', and 'img_norm_cfg'.
For details on the values of these keys see
:class:`mmdet.datasets.pipelines.Collect`.
gt_bboxes (list[Tensor]): Each item are the truth boxes for each
image in [tl_x, tl_y, br_x, br_y] format.
gt_labels (list[Tensor]): Class indices corresponding to each box
gt_bboxes_ignore (None | list[Tensor]): Specify which bounding
boxes can be ignored when computing the loss.
Returns:
dict[str, Tensor]: A dictionary of loss components.
"""
super(SingleStageDetector, self).forward_train(img, img_metas)
x = self.extract_feat(img)
losses = self.bbox_head.forward_train(x, img_metas, gt_bboxes,
gt_labels, gt_bboxes_ignore)
return losses
def simple_test(self, img, img_metas, rescale=False):
"""Test function without test-time augmentation.
Args:
img (torch.Tensor): Images with shape (N, C, H, W).
img_metas (list[dict]): List of image information.
rescale (bool, optional): Whether to rescale the results.
Defaults to False.
Returns:
list[list[np.ndarray]]: BBox results of each image and classes.
The outer list corresponds to each image. The inner list
corresponds to each class.
"""
feat = self.extract_feat(img)
results_list = self.bbox_head.simple_test(
feat, img_metas, rescale=rescale)
bbox_results = [
bbox2result(det_bboxes, det_labels, self.bbox_head.num_classes)
for det_bboxes, det_labels in results_list
]
return bbox_results
def aug_test(self, imgs, img_metas, rescale=False):
"""Test function with test time augmentation.
Args:
imgs (list[Tensor]): the outer list indicates test-time
augmentations and inner Tensor should have a shape NxCxHxW,
which contains all images in the batch.
img_metas (list[list[dict]]): the outer list indicates test-time
augs (multiscale, flip, etc.) and the inner list indicates
images in a batch. each dict has image information.
rescale (bool, optional): Whether to rescale the results.
Defaults to False.
Returns:
list[list[np.ndarray]]: BBox results of each image and classes.
The outer list corresponds to each image. The inner list
corresponds to each class.
"""
assert hasattr(self.bbox_head, 'aug_test'), \
f'{self.bbox_head.__class__.__name__}' \
' does not support test-time augmentation'
feats = self.extract_feats(imgs)
results_list = self.bbox_head.aug_test(
feats, img_metas, rescale=rescale)
bbox_results = [
bbox2result(det_bboxes, det_labels, self.bbox_head.num_classes)
for det_bboxes, det_labels in results_list
]
return bbox_results
def onnx_export(self, img, img_metas, with_nms=True):
"""Test function without test time augmentation.
Args:
img (torch.Tensor): input images.
img_metas (list[dict]): List of image information.
Returns:
tuple[Tensor, Tensor]: dets of shape [N, num_det, 5]
and class labels of shape [N, num_det].
"""
x = self.extract_feat(img)
outs = self.bbox_head(x)
# get origin input shape to support onnx dynamic shape
# get shape as tensor
img_shape = torch._shape_as_tensor(img)[2:]
img_metas[0]['img_shape_for_onnx'] = img_shape
# get pad input shape to support onnx dynamic shape for exporting
# `CornerNet` and `CentripetalNet`, which 'pad_shape' is used
# for inference
img_metas[0]['pad_shape_for_onnx'] = img_shape
if len(outs) == 2:
# add dummy score_factor
outs = (*outs, None)
# TODO Can we change to `get_bboxes` when `onnx_export` fail
det_bboxes, det_labels = self.bbox_head.onnx_export(
*outs, img_metas, with_nms=with_nms)
return det_bboxes, det_labels
| 6,645 | 37.639535 | 78 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/gfl.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module()
class GFL(SingleStageDetector):
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None,
init_cfg=None):
super(GFL, self).__init__(backbone, neck, bbox_head, train_cfg,
test_cfg, pretrained, init_cfg)
| 561 | 28.578947 | 71 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/detr.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import warnings
import torch
from ..builder import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module()
class DETR(SingleStageDetector):
r"""Implementation of `DETR: End-to-End Object Detection with
Transformers <https://arxiv.org/pdf/2005.12872>`_"""
def __init__(self,
backbone,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None,
init_cfg=None):
super(DETR, self).__init__(backbone, None, bbox_head, train_cfg,
test_cfg, pretrained, init_cfg)
# over-write `forward_dummy` because:
# the forward of bbox_head requires img_metas
def forward_dummy(self, img):
"""Used for computing network flops.
See `mmdetection/tools/analysis_tools/get_flops.py`
"""
warnings.warn('Warning! MultiheadAttention in DETR does not '
'support flops computation! Do not use the '
'results in your papers!')
batch_size, _, height, width = img.shape
dummy_img_metas = [
dict(
batch_input_shape=(height, width),
img_shape=(height, width, 3)) for _ in range(batch_size)
]
x = self.extract_feat(img)
outs = self.bbox_head(x, dummy_img_metas)
return outs
# over-write `onnx_export` because:
# (1) the forward of bbox_head requires img_metas
# (2) the different behavior (e.g. construction of `masks`) between
# torch and ONNX model, during the forward of bbox_head
def onnx_export(self, img, img_metas):
"""Test function for exporting to ONNX, without test time augmentation.
Args:
img (torch.Tensor): input images.
img_metas (list[dict]): List of image information.
Returns:
tuple[Tensor, Tensor]: dets of shape [N, num_det, 5]
and class labels of shape [N, num_det].
"""
x = self.extract_feat(img)
# forward of this head requires img_metas
outs = self.bbox_head.forward_onnx(x, img_metas)
# get shape as tensor
img_shape = torch._shape_as_tensor(img)[2:]
img_metas[0]['img_shape_for_onnx'] = img_shape
det_bboxes, det_labels = self.bbox_head.onnx_export(*outs, img_metas)
return det_bboxes, det_labels
| 2,483 | 33.985915 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/yolo.py
|
# Copyright (c) OpenMMLab. All rights reserved.
# Copyright (c) 2019 Western Digital Corporation or its affiliates.
import torch
from ..builder import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module()
class YOLOV3(SingleStageDetector):
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None,
init_cfg=None):
super(YOLOV3, self).__init__(backbone, neck, bbox_head, train_cfg,
test_cfg, pretrained, init_cfg)
def onnx_export(self, img, img_metas):
"""Test function for exporting to ONNX, without test time augmentation.
Args:
img (torch.Tensor): input images.
img_metas (list[dict]): List of image information.
Returns:
tuple[Tensor, Tensor]: dets of shape [N, num_det, 5]
and class labels of shape [N, num_det].
"""
x = self.extract_feat(img)
outs = self.bbox_head.forward(x)
# get shape as tensor
img_shape = torch._shape_as_tensor(img)[2:]
img_metas[0]['img_shape_for_onnx'] = img_shape
det_bboxes, det_labels = self.bbox_head.onnx_export(*outs, img_metas)
return det_bboxes, det_labels
| 1,382 | 31.162791 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/reppoints_detector.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module()
class RepPointsDetector(SingleStageDetector):
"""RepPoints: Point Set Representation for Object Detection.
This detector is the implementation of:
- RepPoints detector (https://arxiv.org/pdf/1904.11490)
"""
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None,
init_cfg=None):
super(RepPointsDetector,
self).__init__(backbone, neck, bbox_head, train_cfg, test_cfg,
pretrained, init_cfg)
| 784 | 30.4 | 76 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/scnet.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .cascade_rcnn import CascadeRCNN
@DETECTORS.register_module()
class SCNet(CascadeRCNN):
"""Implementation of `SCNet <https://arxiv.org/abs/2012.10150>`_"""
def __init__(self, **kwargs):
super(SCNet, self).__init__(**kwargs)
| 328 | 26.416667 | 71 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/kd_one_stage.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import mmcv
import torch
from mmcv.runner import load_checkpoint
from .. import build_detector
from ..builder import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module()
class KnowledgeDistillationSingleStageDetector(SingleStageDetector):
r"""Implementation of `Distilling the Knowledge in a Neural Network.
<https://arxiv.org/abs/1503.02531>`_.
Args:
teacher_config (str | dict): Config file path
or the config object of teacher model.
teacher_ckpt (str, optional): Checkpoint path of teacher model.
If left as None, the model will not load any weights.
"""
def __init__(self,
backbone,
neck,
bbox_head,
teacher_config,
teacher_ckpt=None,
eval_teacher=True,
train_cfg=None,
test_cfg=None,
pretrained=None):
super().__init__(backbone, neck, bbox_head, train_cfg, test_cfg,
pretrained)
self.eval_teacher = eval_teacher
# Build teacher model
if isinstance(teacher_config, str):
teacher_config = mmcv.Config.fromfile(teacher_config)
self.teacher_model = build_detector(teacher_config['model'])
if teacher_ckpt is not None:
load_checkpoint(
self.teacher_model, teacher_ckpt, map_location='cpu')
def forward_train(self,
img,
img_metas,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None):
"""
Args:
img (Tensor): Input images of shape (N, C, H, W).
Typically these should be mean centered and std scaled.
img_metas (list[dict]): A List of image info dict where each dict
has: 'img_shape', 'scale_factor', 'flip', and may also contain
'filename', 'ori_shape', 'pad_shape', and 'img_norm_cfg'.
For details on the values of these keys see
:class:`mmdet.datasets.pipelines.Collect`.
gt_bboxes (list[Tensor]): Each item are the truth boxes for each
image in [tl_x, tl_y, br_x, br_y] format.
gt_labels (list[Tensor]): Class indices corresponding to each box
gt_bboxes_ignore (None | list[Tensor]): Specify which bounding
boxes can be ignored when computing the loss.
Returns:
dict[str, Tensor]: A dictionary of loss components.
"""
x = self.extract_feat(img)
with torch.no_grad():
teacher_x = self.teacher_model.extract_feat(img)
out_teacher = self.teacher_model.bbox_head(teacher_x)
losses = self.bbox_head.forward_train(x, out_teacher, img_metas,
gt_bboxes, gt_labels,
gt_bboxes_ignore)
return losses
def cuda(self, device=None):
"""Since teacher_model is registered as a plain object, it is necessary
to put the teacher model to cuda when calling cuda function."""
self.teacher_model.cuda(device=device)
return super().cuda(device=device)
def train(self, mode=True):
"""Set the same train mode for teacher and student model."""
if self.eval_teacher:
self.teacher_model.train(False)
else:
self.teacher_model.train(mode)
super().train(mode)
def __setattr__(self, name, value):
"""Set attribute, i.e. self.name = value
This reloading prevent the teacher model from being registered as a
nn.Module. The teacher module is registered as a plain object, so that
the teacher parameters will not show up when calling
``self.parameters``, ``self.modules``, ``self.children`` methods.
"""
if name == 'teacher_model':
object.__setattr__(self, name, value)
else:
super().__setattr__(name, value)
| 4,150 | 39.696078 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/fast_rcnn.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .two_stage import TwoStageDetector
@DETECTORS.register_module()
class FastRCNN(TwoStageDetector):
"""Implementation of `Fast R-CNN <https://arxiv.org/abs/1504.08083>`_"""
def __init__(self,
backbone,
roi_head,
train_cfg,
test_cfg,
neck=None,
pretrained=None,
init_cfg=None):
super(FastRCNN, self).__init__(
backbone=backbone,
neck=neck,
roi_head=roi_head,
train_cfg=train_cfg,
test_cfg=test_cfg,
pretrained=pretrained,
init_cfg=init_cfg)
def forward_test(self, imgs, img_metas, proposals, **kwargs):
"""
Args:
imgs (List[Tensor]): the outer list indicates test-time
augmentations and inner Tensor should have a shape NxCxHxW,
which contains all images in the batch.
img_metas (List[List[dict]]): the outer list indicates test-time
augs (multiscale, flip, etc.) and the inner list indicates
images in a batch.
proposals (List[List[Tensor]]): the outer list indicates test-time
augs (multiscale, flip, etc.) and the inner list indicates
images in a batch. The Tensor should have a shape Px4, where
P is the number of proposals.
"""
for var, name in [(imgs, 'imgs'), (img_metas, 'img_metas')]:
if not isinstance(var, list):
raise TypeError(f'{name} must be a list, but got {type(var)}')
num_augs = len(imgs)
if num_augs != len(img_metas):
raise ValueError(f'num of augmentations ({len(imgs)}) '
f'!= num of image meta ({len(img_metas)})')
if num_augs == 1:
return self.simple_test(imgs[0], img_metas[0], proposals[0],
**kwargs)
else:
# TODO: support test-time augmentation
assert NotImplementedError
| 2,164 | 37.660714 | 78 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/autoassign.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module()
class AutoAssign(SingleStageDetector):
"""Implementation of `AutoAssign: Differentiable Label Assignment for Dense
Object Detection <https://arxiv.org/abs/2007.03496>`_."""
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None):
super(AutoAssign, self).__init__(backbone, neck, bbox_head, train_cfg,
test_cfg, pretrained)
| 682 | 33.15 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/cascade_rcnn.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .two_stage import TwoStageDetector
@DETECTORS.register_module()
class CascadeRCNN(TwoStageDetector):
r"""Implementation of `Cascade R-CNN: Delving into High Quality Object
Detection <https://arxiv.org/abs/1906.09756>`_"""
def __init__(self,
backbone,
neck=None,
rpn_head=None,
roi_head=None,
train_cfg=None,
test_cfg=None,
pretrained=None,
init_cfg=None):
super(CascadeRCNN, self).__init__(
backbone=backbone,
neck=neck,
rpn_head=rpn_head,
roi_head=roi_head,
train_cfg=train_cfg,
test_cfg=test_cfg,
pretrained=pretrained,
init_cfg=init_cfg)
def show_result(self, data, result, **kwargs):
"""Show prediction results of the detector.
Args:
data (str or np.ndarray): Image filename or loaded image.
result (Tensor or tuple): The results to draw over `img`
bbox_result or (bbox_result, segm_result).
Returns:
np.ndarray: The image with bboxes drawn on it.
"""
if self.with_mask:
ms_bbox_result, ms_segm_result = result
if isinstance(ms_bbox_result, dict):
result = (ms_bbox_result['ensemble'],
ms_segm_result['ensemble'])
else:
if isinstance(result, dict):
result = result['ensemble']
return super(CascadeRCNN, self).show_result(data, result, **kwargs)
| 1,698 | 32.98 | 75 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/dsla.py
|
from ..builder import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module()
class DSLA(SingleStageDetector):
""""""
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None):
super(DSLA, self).__init__(backbone, neck, bbox_head, train_cfg,
test_cfg, pretrained)
| 485 | 26 | 72 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/deformable_detr.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .detr import DETR
@DETECTORS.register_module()
class DeformableDETR(DETR):
def __init__(self, *args, **kwargs):
super(DETR, self).__init__(*args, **kwargs)
| 256 | 22.363636 | 51 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/nasfcos.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module()
class NASFCOS(SingleStageDetector):
"""NAS-FCOS: Fast Neural Architecture Search for Object Detection.
https://arxiv.org/abs/1906.0442
"""
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None,
init_cfg=None):
super(NASFCOS, self).__init__(backbone, neck, bbox_head, train_cfg,
test_cfg, pretrained, init_cfg)
| 689 | 29 | 75 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/mask_rcnn.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .two_stage import TwoStageDetector
@DETECTORS.register_module()
class MaskRCNN(TwoStageDetector):
"""Implementation of `Mask R-CNN <https://arxiv.org/abs/1703.06870>`_"""
def __init__(self,
backbone,
rpn_head,
roi_head,
train_cfg,
test_cfg,
neck=None,
pretrained=None,
init_cfg=None):
super(MaskRCNN, self).__init__(
backbone=backbone,
neck=neck,
rpn_head=rpn_head,
roi_head=roi_head,
train_cfg=train_cfg,
test_cfg=test_cfg,
pretrained=pretrained,
init_cfg=init_cfg)
| 803 | 27.714286 | 76 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/paa.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module()
class PAA(SingleStageDetector):
"""Implementation of `PAA <https://arxiv.org/pdf/2007.08103.pdf>`_."""
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None,
init_cfg=None):
super(PAA, self).__init__(backbone, neck, bbox_head, train_cfg,
test_cfg, pretrained, init_cfg)
| 636 | 30.85 | 74 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/faster_rcnn.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .two_stage import TwoStageDetector
@DETECTORS.register_module()
class FasterRCNN(TwoStageDetector):
"""Implementation of `Faster R-CNN <https://arxiv.org/abs/1506.01497>`_"""
def __init__(self,
backbone,
rpn_head,
roi_head,
train_cfg,
test_cfg,
neck=None,
pretrained=None,
init_cfg=None):
super(FasterRCNN, self).__init__(
backbone=backbone,
neck=neck,
rpn_head=rpn_head,
roi_head=roi_head,
train_cfg=train_cfg,
test_cfg=test_cfg,
pretrained=pretrained,
init_cfg=init_cfg)
| 809 | 27.928571 | 78 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/grid_rcnn.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .two_stage import TwoStageDetector
@DETECTORS.register_module()
class GridRCNN(TwoStageDetector):
"""Grid R-CNN.
This detector is the implementation of:
- Grid R-CNN (https://arxiv.org/abs/1811.12030)
- Grid R-CNN Plus: Faster and Better (https://arxiv.org/abs/1906.05688)
"""
def __init__(self,
backbone,
rpn_head,
roi_head,
train_cfg,
test_cfg,
neck=None,
pretrained=None,
init_cfg=None):
super(GridRCNN, self).__init__(
backbone=backbone,
neck=neck,
rpn_head=rpn_head,
roi_head=roi_head,
train_cfg=train_cfg,
test_cfg=test_cfg,
pretrained=pretrained,
init_cfg=init_cfg)
| 926 | 27.090909 | 75 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/yolact.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import torch
from mmdet.core import bbox2result
from ..builder import DETECTORS, build_head
from .single_stage import SingleStageDetector
@DETECTORS.register_module()
class YOLACT(SingleStageDetector):
"""Implementation of `YOLACT <https://arxiv.org/abs/1904.02689>`_"""
def __init__(self,
backbone,
neck,
bbox_head,
segm_head,
mask_head,
train_cfg=None,
test_cfg=None,
pretrained=None,
init_cfg=None):
super(YOLACT, self).__init__(backbone, neck, bbox_head, train_cfg,
test_cfg, pretrained, init_cfg)
self.segm_head = build_head(segm_head)
self.mask_head = build_head(mask_head)
def forward_dummy(self, img):
"""Used for computing network flops.
See `mmdetection/tools/analysis_tools/get_flops.py`
"""
feat = self.extract_feat(img)
bbox_outs = self.bbox_head(feat)
prototypes = self.mask_head.forward_dummy(feat[0])
return (bbox_outs, prototypes)
def forward_train(self,
img,
img_metas,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None):
"""
Args:
img (Tensor): of shape (N, C, H, W) encoding input images.
Typically these should be mean centered and std scaled.
img_metas (list[dict]): list of image info dict where each dict
has: 'img_shape', 'scale_factor', 'flip', and may also contain
'filename', 'ori_shape', 'pad_shape', and 'img_norm_cfg'.
For details on the values of these keys see
`mmdet/datasets/pipelines/formatting.py:Collect`.
gt_bboxes (list[Tensor]): Ground truth bboxes for each image with
shape (num_gts, 4) in [tl_x, tl_y, br_x, br_y] format.
gt_labels (list[Tensor]): class indices corresponding to each box
gt_bboxes_ignore (None | list[Tensor]): specify which bounding
boxes can be ignored when computing the loss.
gt_masks (None | Tensor) : true segmentation masks for each box
used if the architecture supports a segmentation task.
Returns:
dict[str, Tensor]: a dictionary of loss components
"""
# convert Bitmap mask or Polygon Mask to Tensor here
gt_masks = [
gt_mask.to_tensor(dtype=torch.uint8, device=img.device)
for gt_mask in gt_masks
]
x = self.extract_feat(img)
cls_score, bbox_pred, coeff_pred = self.bbox_head(x)
bbox_head_loss_inputs = (cls_score, bbox_pred) + (gt_bboxes, gt_labels,
img_metas)
losses, sampling_results = self.bbox_head.loss(
*bbox_head_loss_inputs, gt_bboxes_ignore=gt_bboxes_ignore)
segm_head_outs = self.segm_head(x[0])
loss_segm = self.segm_head.loss(segm_head_outs, gt_masks, gt_labels)
losses.update(loss_segm)
mask_pred = self.mask_head(x[0], coeff_pred, gt_bboxes, img_metas,
sampling_results)
loss_mask = self.mask_head.loss(mask_pred, gt_masks, gt_bboxes,
img_metas, sampling_results)
losses.update(loss_mask)
# check NaN and Inf
for loss_name in losses.keys():
assert torch.isfinite(torch.stack(losses[loss_name]))\
.all().item(), '{} becomes infinite or NaN!'\
.format(loss_name)
return losses
def simple_test(self, img, img_metas, rescale=False):
"""Test function without test-time augmentation."""
feat = self.extract_feat(img)
det_bboxes, det_labels, det_coeffs = self.bbox_head.simple_test(
feat, img_metas, rescale=rescale)
bbox_results = [
bbox2result(det_bbox, det_label, self.bbox_head.num_classes)
for det_bbox, det_label in zip(det_bboxes, det_labels)
]
segm_results = self.mask_head.simple_test(
feat,
det_bboxes,
det_labels,
det_coeffs,
img_metas,
rescale=rescale)
return list(zip(bbox_results, segm_results))
def aug_test(self, imgs, img_metas, rescale=False):
"""Test with augmentations."""
raise NotImplementedError(
'YOLACT does not support test-time augmentation')
| 4,728 | 38.082645 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/rpn.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import warnings
import mmcv
import torch
from mmcv.image import tensor2imgs
from mmdet.core import bbox_mapping
from ..builder import DETECTORS, build_backbone, build_head, build_neck
from .base import BaseDetector
@DETECTORS.register_module()
class RPN(BaseDetector):
"""Implementation of Region Proposal Network."""
def __init__(self,
backbone,
neck,
rpn_head,
train_cfg,
test_cfg,
pretrained=None,
init_cfg=None):
super(RPN, self).__init__(init_cfg)
if pretrained:
warnings.warn('DeprecationWarning: pretrained is deprecated, '
'please use "init_cfg" instead')
backbone.pretrained = pretrained
self.backbone = build_backbone(backbone)
self.neck = build_neck(neck) if neck is not None else None
rpn_train_cfg = train_cfg.rpn if train_cfg is not None else None
rpn_head.update(train_cfg=rpn_train_cfg)
rpn_head.update(test_cfg=test_cfg.rpn)
self.rpn_head = build_head(rpn_head)
self.train_cfg = train_cfg
self.test_cfg = test_cfg
def extract_feat(self, img):
"""Extract features.
Args:
img (torch.Tensor): Image tensor with shape (n, c, h ,w).
Returns:
list[torch.Tensor]: Multi-level features that may have
different resolutions.
"""
x = self.backbone(img)
if self.with_neck:
x = self.neck(x)
return x
def forward_dummy(self, img):
"""Dummy forward function."""
x = self.extract_feat(img)
rpn_outs = self.rpn_head(x)
return rpn_outs
def forward_train(self,
img,
img_metas,
gt_bboxes=None,
gt_bboxes_ignore=None):
"""
Args:
img (Tensor): Input images of shape (N, C, H, W).
Typically these should be mean centered and std scaled.
img_metas (list[dict]): A List of image info dict where each dict
has: 'img_shape', 'scale_factor', 'flip', and may also contain
'filename', 'ori_shape', 'pad_shape', and 'img_norm_cfg'.
For details on the values of these keys see
:class:`mmdet.datasets.pipelines.Collect`.
gt_bboxes (list[Tensor]): Each item are the truth boxes for each
image in [tl_x, tl_y, br_x, br_y] format.
gt_bboxes_ignore (None | list[Tensor]): Specify which bounding
boxes can be ignored when computing the loss.
Returns:
dict[str, Tensor]: A dictionary of loss components.
"""
if (isinstance(self.train_cfg.rpn, dict)
and self.train_cfg.rpn.get('debug', False)):
self.rpn_head.debug_imgs = tensor2imgs(img)
x = self.extract_feat(img)
losses = self.rpn_head.forward_train(x, img_metas, gt_bboxes, None,
gt_bboxes_ignore)
return losses
def simple_test(self, img, img_metas, rescale=False):
"""Test function without test time augmentation.
Args:
imgs (list[torch.Tensor]): List of multiple images
img_metas (list[dict]): List of image information.
rescale (bool, optional): Whether to rescale the results.
Defaults to False.
Returns:
list[np.ndarray]: proposals
"""
x = self.extract_feat(img)
# get origin input shape to onnx dynamic input shape
if torch.onnx.is_in_onnx_export():
img_shape = torch._shape_as_tensor(img)[2:]
img_metas[0]['img_shape_for_onnx'] = img_shape
proposal_list = self.rpn_head.simple_test_rpn(x, img_metas)
if rescale:
for proposals, meta in zip(proposal_list, img_metas):
proposals[:, :4] /= proposals.new_tensor(meta['scale_factor'])
if torch.onnx.is_in_onnx_export():
return proposal_list
return [proposal.cpu().numpy() for proposal in proposal_list]
def aug_test(self, imgs, img_metas, rescale=False):
"""Test function with test time augmentation.
Args:
imgs (list[torch.Tensor]): List of multiple images
img_metas (list[dict]): List of image information.
rescale (bool, optional): Whether to rescale the results.
Defaults to False.
Returns:
list[np.ndarray]: proposals
"""
proposal_list = self.rpn_head.aug_test_rpn(
self.extract_feats(imgs), img_metas)
if not rescale:
for proposals, img_meta in zip(proposal_list, img_metas[0]):
img_shape = img_meta['img_shape']
scale_factor = img_meta['scale_factor']
flip = img_meta['flip']
flip_direction = img_meta['flip_direction']
proposals[:, :4] = bbox_mapping(proposals[:, :4], img_shape,
scale_factor, flip,
flip_direction)
return [proposal.cpu().numpy() for proposal in proposal_list]
def show_result(self, data, result, top_k=20, **kwargs):
"""Show RPN proposals on the image.
Args:
data (str or np.ndarray): Image filename or loaded image.
result (Tensor or tuple): The results to draw over `img`
bbox_result or (bbox_result, segm_result).
top_k (int): Plot the first k bboxes only
if set positive. Default: 20
Returns:
np.ndarray: The image with bboxes drawn on it.
"""
if kwargs is not None:
kwargs.pop('score_thr', None)
kwargs.pop('text_color', None)
kwargs['colors'] = kwargs.pop('bbox_color', 'green')
mmcv.imshow_bboxes(data, result, top_k=top_k, **kwargs)
| 6,136 | 37.35625 | 78 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/trident_faster_rcnn.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .faster_rcnn import FasterRCNN
@DETECTORS.register_module()
class TridentFasterRCNN(FasterRCNN):
"""Implementation of `TridentNet <https://arxiv.org/abs/1901.01892>`_"""
def __init__(self,
backbone,
rpn_head,
roi_head,
train_cfg,
test_cfg,
neck=None,
pretrained=None,
init_cfg=None):
super(TridentFasterRCNN, self).__init__(
backbone=backbone,
neck=neck,
rpn_head=rpn_head,
roi_head=roi_head,
train_cfg=train_cfg,
test_cfg=test_cfg,
pretrained=pretrained,
init_cfg=init_cfg)
assert self.backbone.num_branch == self.roi_head.num_branch
assert self.backbone.test_branch_idx == self.roi_head.test_branch_idx
self.num_branch = self.backbone.num_branch
self.test_branch_idx = self.backbone.test_branch_idx
def simple_test(self, img, img_metas, proposals=None, rescale=False):
"""Test without augmentation."""
assert self.with_bbox, 'Bbox head must be implemented.'
x = self.extract_feat(img)
if proposals is None:
num_branch = (self.num_branch if self.test_branch_idx == -1 else 1)
trident_img_metas = img_metas * num_branch
proposal_list = self.rpn_head.simple_test_rpn(x, trident_img_metas)
else:
proposal_list = proposals
# TODO： Fix trident_img_metas undefined errors
# when proposals is specified
return self.roi_head.simple_test(
x, proposal_list, trident_img_metas, rescale=rescale)
def aug_test(self, imgs, img_metas, rescale=False):
"""Test with augmentations.
If rescale is False, then returned bboxes and masks will fit the scale
of imgs[0].
"""
x = self.extract_feats(imgs)
num_branch = (self.num_branch if self.test_branch_idx == -1 else 1)
trident_img_metas = [img_metas * num_branch for img_metas in img_metas]
proposal_list = self.rpn_head.aug_test_rpn(x, trident_img_metas)
return self.roi_head.aug_test(
x, proposal_list, img_metas, rescale=rescale)
def forward_train(self, img, img_metas, gt_bboxes, gt_labels, **kwargs):
"""make copies of img and gts to fit multi-branch."""
trident_gt_bboxes = tuple(gt_bboxes * self.num_branch)
trident_gt_labels = tuple(gt_labels * self.num_branch)
trident_img_metas = tuple(img_metas * self.num_branch)
return super(TridentFasterRCNN,
self).forward_train(img, trident_img_metas,
trident_gt_bboxes, trident_gt_labels)
| 2,866 | 39.380282 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/retinanet.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module()
class RetinaNet(SingleStageDetector):
"""Implementation of `RetinaNet <https://arxiv.org/abs/1708.02002>`_"""
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None,
init_cfg=None):
super(RetinaNet, self).__init__(backbone, neck, bbox_head, train_cfg,
test_cfg, pretrained, init_cfg)
| 655 | 31.8 | 77 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/point_rend.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .two_stage import TwoStageDetector
@DETECTORS.register_module()
class PointRend(TwoStageDetector):
"""PointRend: Image Segmentation as Rendering
This detector is the implementation of
`PointRend <https://arxiv.org/abs/1912.08193>`_.
"""
def __init__(self,
backbone,
rpn_head,
roi_head,
train_cfg,
test_cfg,
neck=None,
pretrained=None,
init_cfg=None):
super(PointRend, self).__init__(
backbone=backbone,
neck=neck,
rpn_head=rpn_head,
roi_head=roi_head,
train_cfg=train_cfg,
test_cfg=test_cfg,
pretrained=pretrained,
init_cfg=init_cfg)
| 884 | 25.818182 | 52 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/queryinst.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .sparse_rcnn import SparseRCNN
@DETECTORS.register_module()
class QueryInst(SparseRCNN):
r"""Implementation of
`Instances as Queries <http://arxiv.org/abs/2105.01928>`_"""
def __init__(self,
backbone,
rpn_head,
roi_head,
train_cfg,
test_cfg,
neck=None,
pretrained=None,
init_cfg=None):
super(QueryInst, self).__init__(
backbone=backbone,
neck=neck,
rpn_head=rpn_head,
roi_head=roi_head,
train_cfg=train_cfg,
test_cfg=test_cfg,
pretrained=pretrained,
init_cfg=init_cfg)
| 809 | 26.931034 | 64 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/atss.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module()
class ATSS(SingleStageDetector):
"""Implementation of `ATSS <https://arxiv.org/abs/1912.02424>`_."""
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None,
init_cfg=None):
super(ATSS, self).__init__(backbone, neck, bbox_head, train_cfg,
test_cfg, pretrained, init_cfg)
| 636 | 30.85 | 72 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/panoptic_two_stage_segmentor.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import torch
from mmdet.core import bbox2roi, multiclass_nms
from ..builder import DETECTORS, build_head
from ..roi_heads.mask_heads.fcn_mask_head import _do_paste_mask
from .two_stage import TwoStageDetector
@DETECTORS.register_module()
class TwoStagePanopticSegmentor(TwoStageDetector):
"""Base class of Two-stage Panoptic Segmentor.
As well as the components in TwoStageDetector, Panoptic Segmentor has extra
semantic_head and panoptic_fusion_head.
"""
def __init__(
self,
backbone,
neck=None,
rpn_head=None,
roi_head=None,
train_cfg=None,
test_cfg=None,
pretrained=None,
init_cfg=None,
# for panoptic segmentation
semantic_head=None,
panoptic_fusion_head=None):
super(TwoStagePanopticSegmentor,
self).__init__(backbone, neck, rpn_head, roi_head, train_cfg,
test_cfg, pretrained, init_cfg)
if semantic_head is not None:
self.semantic_head = build_head(semantic_head)
if panoptic_fusion_head is not None:
panoptic_cfg = test_cfg.panoptic if test_cfg is not None else None
panoptic_fusion_head_ = panoptic_fusion_head.deepcopy()
panoptic_fusion_head_.update(test_cfg=panoptic_cfg)
self.panoptic_fusion_head = build_head(panoptic_fusion_head_)
self.num_things_classes = self.panoptic_fusion_head.\
num_things_classes
self.num_stuff_classes = self.panoptic_fusion_head.\
num_stuff_classes
self.num_classes = self.panoptic_fusion_head.num_classes
@property
def with_semantic_head(self):
return hasattr(self,
'semantic_head') and self.semantic_head is not None
@property
def with_panoptic_fusion_head(self):
return hasattr(self, 'panoptic_fusion_heads') and \
self.panoptic_fusion_head is not None
def forward_dummy(self, img):
"""Used for computing network flops.
See `mmdetection/tools/get_flops.py`
"""
raise NotImplementedError(
f'`forward_dummy` is not implemented in {self.__class__.__name__}')
def forward_train(self,
img,
img_metas,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None,
gt_semantic_seg=None,
proposals=None,
**kwargs):
x = self.extract_feat(img)
losses = dict()
# RPN forward and loss
if self.with_rpn:
proposal_cfg = self.train_cfg.get('rpn_proposal',
self.test_cfg.rpn)
rpn_losses, proposal_list = self.rpn_head.forward_train(
x,
img_metas,
gt_bboxes,
gt_labels=None,
gt_bboxes_ignore=gt_bboxes_ignore,
proposal_cfg=proposal_cfg)
losses.update(rpn_losses)
else:
proposal_list = proposals
roi_losses = self.roi_head.forward_train(x, img_metas, proposal_list,
gt_bboxes, gt_labels,
gt_bboxes_ignore, gt_masks,
**kwargs)
losses.update(roi_losses)
semantic_loss = self.semantic_head.forward_train(x, gt_semantic_seg)
losses.update(semantic_loss)
return losses
def simple_test_mask(self,
x,
img_metas,
det_bboxes,
det_labels,
rescale=False):
"""Simple test for mask head without augmentation."""
img_shapes = tuple(meta['ori_shape']
for meta in img_metas) if rescale else tuple(
meta['pad_shape'] for meta in img_metas)
scale_factors = tuple(meta['scale_factor'] for meta in img_metas)
if all(det_bbox.shape[0] == 0 for det_bbox in det_bboxes):
masks = []
for img_shape in img_shapes:
out_shape = (0, self.roi_head.bbox_head.num_classes) \
+ img_shape[:2]
masks.append(det_bboxes[0].new_zeros(out_shape))
mask_pred = det_bboxes[0].new_zeros((0, 80, 28, 28))
mask_results = dict(
masks=masks, mask_pred=mask_pred, mask_feats=None)
return mask_results
_bboxes = [det_bboxes[i][:, :4] for i in range(len(det_bboxes))]
if rescale:
if not isinstance(scale_factors[0], float):
scale_factors = [
det_bboxes[0].new_tensor(scale_factor)
for scale_factor in scale_factors
]
_bboxes = [
_bboxes[i] * scale_factors[i] for i in range(len(_bboxes))
]
mask_rois = bbox2roi(_bboxes)
mask_results = self.roi_head._mask_forward(x, mask_rois)
mask_pred = mask_results['mask_pred']
# split batch mask prediction back to each image
num_mask_roi_per_img = [len(det_bbox) for det_bbox in det_bboxes]
mask_preds = mask_pred.split(num_mask_roi_per_img, 0)
# resize the mask_preds to (K, H, W)
masks = []
for i in range(len(_bboxes)):
det_bbox = det_bboxes[i][:, :4]
det_label = det_labels[i]
mask_pred = mask_preds[i].sigmoid()
box_inds = torch.arange(mask_pred.shape[0])
mask_pred = mask_pred[box_inds, det_label][:, None]
img_h, img_w, _ = img_shapes[i]
mask_pred, _ = _do_paste_mask(
mask_pred, det_bbox, img_h, img_w, skip_empty=False)
masks.append(mask_pred)
mask_results['masks'] = masks
return mask_results
def simple_test(self, img, img_metas, proposals=None, rescale=False):
"""Test without Augmentation."""
x = self.extract_feat(img)
if proposals is None:
proposal_list = self.rpn_head.simple_test_rpn(x, img_metas)
else:
proposal_list = proposals
bboxes, scores = self.roi_head.simple_test_bboxes(
x, img_metas, proposal_list, None, rescale=rescale)
pan_cfg = self.test_cfg.panoptic
# class-wise predictions
det_bboxes = []
det_labels = []
for bboxe, score in zip(bboxes, scores):
det_bbox, det_label = multiclass_nms(bboxe, score,
pan_cfg.score_thr,
pan_cfg.nms,
pan_cfg.max_per_img)
det_bboxes.append(det_bbox)
det_labels.append(det_label)
mask_results = self.simple_test_mask(
x, img_metas, det_bboxes, det_labels, rescale=rescale)
masks = mask_results['masks']
seg_preds = self.semantic_head.simple_test(x, img_metas, rescale)
results = []
for i in range(len(det_bboxes)):
pan_results = self.panoptic_fusion_head.simple_test(
det_bboxes[i], det_labels[i], masks[i], seg_preds[i])
pan_results = pan_results.int().detach().cpu().numpy()
result = dict(pan_results=pan_results)
results.append(result)
return results
| 7,725 | 36.872549 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/centernet.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import torch
from mmdet.core import bbox2result
from mmdet.models.builder import DETECTORS
from ...core.utils import flip_tensor
from .single_stage import SingleStageDetector
@DETECTORS.register_module()
class CenterNet(SingleStageDetector):
"""Implementation of CenterNet(Objects as Points)
<https://arxiv.org/abs/1904.07850>.
"""
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None,
init_cfg=None):
super(CenterNet, self).__init__(backbone, neck, bbox_head, train_cfg,
test_cfg, pretrained, init_cfg)
def merge_aug_results(self, aug_results, with_nms):
"""Merge augmented detection bboxes and score.
Args:
aug_results (list[list[Tensor]]): Det_bboxes and det_labels of each
image.
with_nms (bool): If True, do nms before return boxes.
Returns:
tuple: (out_bboxes, out_labels)
"""
recovered_bboxes, aug_labels = [], []
for single_result in aug_results:
recovered_bboxes.append(single_result[0][0])
aug_labels.append(single_result[0][1])
bboxes = torch.cat(recovered_bboxes, dim=0).contiguous()
labels = torch.cat(aug_labels).contiguous()
if with_nms:
out_bboxes, out_labels = self.bbox_head._bboxes_nms(
bboxes, labels, self.bbox_head.test_cfg)
else:
out_bboxes, out_labels = bboxes, labels
return out_bboxes, out_labels
def aug_test(self, imgs, img_metas, rescale=True):
"""Augment testing of CenterNet. Aug test must have flipped image pair,
and unlike CornerNet, it will perform an averaging operation on the
feature map instead of detecting bbox.
Args:
imgs (list[Tensor]): Augmented images.
img_metas (list[list[dict]]): Meta information of each image, e.g.,
image size, scaling factor, etc.
rescale (bool): If True, return boxes in original image space.
Default: True.
Note:
``imgs`` must including flipped image pairs.
Returns:
list[list[np.ndarray]]: BBox results of each image and classes.
The outer list corresponds to each image. The inner list
corresponds to each class.
"""
img_inds = list(range(len(imgs)))
assert img_metas[0][0]['flip'] + img_metas[1][0]['flip'], (
'aug test must have flipped image pair')
aug_results = []
for ind, flip_ind in zip(img_inds[0::2], img_inds[1::2]):
flip_direction = img_metas[flip_ind][0]['flip_direction']
img_pair = torch.cat([imgs[ind], imgs[flip_ind]])
x = self.extract_feat(img_pair)
center_heatmap_preds, wh_preds, offset_preds = self.bbox_head(x)
assert len(center_heatmap_preds) == len(wh_preds) == len(
offset_preds) == 1
# Feature map averaging
center_heatmap_preds[0] = (
center_heatmap_preds[0][0:1] +
flip_tensor(center_heatmap_preds[0][1:2], flip_direction)) / 2
wh_preds[0] = (wh_preds[0][0:1] +
flip_tensor(wh_preds[0][1:2], flip_direction)) / 2
bbox_list = self.bbox_head.get_bboxes(
center_heatmap_preds,
wh_preds, [offset_preds[0][0:1]],
img_metas[ind],
rescale=rescale,
with_nms=False)
aug_results.append(bbox_list)
nms_cfg = self.bbox_head.test_cfg.get('nms_cfg', None)
if nms_cfg is None:
with_nms = False
else:
with_nms = True
bbox_list = [self.merge_aug_results(aug_results, with_nms)]
bbox_results = [
bbox2result(det_bboxes, det_labels, self.bbox_head.num_classes)
for det_bboxes, det_labels in bbox_list
]
return bbox_results
| 4,206 | 36.5625 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/fcos.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module()
class FCOS(SingleStageDetector):
"""Implementation of `FCOS <https://arxiv.org/abs/1904.01355>`_"""
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None,
init_cfg=None):
super(FCOS, self).__init__(backbone, neck, bbox_head, train_cfg,
test_cfg, pretrained, init_cfg)
| 635 | 30.8 | 72 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/fovea.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module()
class FOVEA(SingleStageDetector):
"""Implementation of `FoveaBox <https://arxiv.org/abs/1904.03797>`_"""
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None,
init_cfg=None):
super(FOVEA, self).__init__(backbone, neck, bbox_head, train_cfg,
test_cfg, pretrained, init_cfg)
| 642 | 31.15 | 74 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/single_stage_instance_seg.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import copy
import warnings
import mmcv
import numpy as np
import torch
from mmdet.core.visualization.image import imshow_det_bboxes
from ..builder import DETECTORS, build_backbone, build_head, build_neck
from .base import BaseDetector
INF = 1e8
@DETECTORS.register_module()
class SingleStageInstanceSegmentor(BaseDetector):
"""Base class for single-stage instance segmentors."""
def __init__(self,
backbone,
neck=None,
bbox_head=None,
mask_head=None,
train_cfg=None,
test_cfg=None,
pretrained=None,
init_cfg=None):
if pretrained:
warnings.warn('DeprecationWarning: pretrained is deprecated, '
'please use "init_cfg" instead')
backbone.pretrained = pretrained
super(SingleStageInstanceSegmentor, self).__init__(init_cfg=init_cfg)
self.backbone = build_backbone(backbone)
if neck is not None:
self.neck = build_neck(neck)
else:
self.neck = None
if bbox_head is not None:
bbox_head.update(train_cfg=copy.deepcopy(train_cfg))
bbox_head.update(test_cfg=copy.deepcopy(test_cfg))
self.bbox_head = build_head(bbox_head)
else:
self.bbox_head = None
assert mask_head, f'`mask_head` must ' \
f'be implemented in {self.__class__.__name__}'
mask_head.update(train_cfg=copy.deepcopy(train_cfg))
mask_head.update(test_cfg=copy.deepcopy(test_cfg))
self.mask_head = build_head(mask_head)
self.train_cfg = train_cfg
self.test_cfg = test_cfg
def extract_feat(self, img):
"""Directly extract features from the backbone and neck."""
x = self.backbone(img)
if self.with_neck:
x = self.neck(x)
return x
def forward_dummy(self, img):
"""Used for computing network flops.
See `mmdetection/tools/analysis_tools/get_flops.py`
"""
raise NotImplementedError(
f'`forward_dummy` is not implemented in {self.__class__.__name__}')
def forward_train(self,
img,
img_metas,
gt_masks,
gt_labels,
gt_bboxes=None,
gt_bboxes_ignore=None,
**kwargs):
"""
Args:
img (Tensor): Input images of shape (B, C, H, W).
Typically these should be mean centered and std scaled.
img_metas (list[dict]): A List of image info dict where each dict
has: 'img_shape', 'scale_factor', 'flip', and may also contain
'filename', 'ori_shape', 'pad_shape', and 'img_norm_cfg'.
For details on the values of these keys see
:class:`mmdet.datasets.pipelines.Collect`.
gt_masks (list[:obj:`BitmapMasks`] | None) : The segmentation
masks for each box.
gt_labels (list[Tensor]): Class indices corresponding to each box
gt_bboxes (list[Tensor]): Each item is the truth boxes
of each image in [tl_x, tl_y, br_x, br_y] format.
Default: None.
gt_bboxes_ignore (list[Tensor] | None): Specify which bounding
boxes can be ignored when computing the loss.
Returns:
dict[str, Tensor]: A dictionary of loss components.
"""
gt_masks = [
gt_mask.to_tensor(dtype=torch.bool, device=img.device)
for gt_mask in gt_masks
]
x = self.extract_feat(img)
losses = dict()
# CondInst and YOLACT have bbox_head
if self.bbox_head:
# bbox_head_preds is a tuple
bbox_head_preds = self.bbox_head(x)
# positive_infos is a list of obj:`InstanceData`
# It contains the information about the positive samples
# CondInst, YOLACT
det_losses, positive_infos = self.bbox_head.loss(
*bbox_head_preds,
gt_bboxes=gt_bboxes,
gt_labels=gt_labels,
gt_masks=gt_masks,
img_metas=img_metas,
gt_bboxes_ignore=gt_bboxes_ignore,
**kwargs)
losses.update(det_losses)
else:
positive_infos = None
mask_loss = self.mask_head.forward_train(
x,
gt_labels,
gt_masks,
img_metas,
positive_infos=positive_infos,
gt_bboxes=gt_bboxes,
gt_bboxes_ignore=gt_bboxes_ignore,
**kwargs)
# avoid loss override
assert not set(mask_loss.keys()) & set(losses.keys())
losses.update(mask_loss)
return losses
def simple_test(self, img, img_metas, rescale=False):
"""Test function without test-time augmentation.
Args:
img (torch.Tensor): Images with shape (B, C, H, W).
img_metas (list[dict]): List of image information.
rescale (bool, optional): Whether to rescale the results.
Defaults to False.
Returns:
list(tuple): Formatted bbox and mask results of multiple \
images. The outer list corresponds to each image. \
Each tuple contains two type of results of single image:
- bbox_results (list[np.ndarray]): BBox results of
single image. The list corresponds to each class.
each ndarray has a shape (N, 5), N is the number of
bboxes with this category, and last dimension
5 arrange as (x1, y1, x2, y2, scores).
- mask_results (list[np.ndarray]): Mask results of
single image. The list corresponds to each class.
each ndarray has a shape (N, img_h, img_w), N
is the number of masks with this category.
"""
feat = self.extract_feat(img)
if self.bbox_head:
outs = self.bbox_head(feat)
# results_list is list[obj:`InstanceData`]
results_list = self.bbox_head.get_results(
*outs, img_metas=img_metas, cfg=self.test_cfg, rescale=rescale)
else:
results_list = None
results_list = self.mask_head.simple_test(
feat, img_metas, rescale=rescale, instances_list=results_list)
format_results_list = []
for results in results_list:
format_results_list.append(self.format_results(results))
return format_results_list
def format_results(self, results):
"""Format the model predictions according to the interface with
dataset.
Args:
results (:obj:`InstanceData`): Processed
results of single images. Usually contains
following keys.
- scores (Tensor): Classification scores, has shape
(num_instance,)
- labels (Tensor): Has shape (num_instances,).
- masks (Tensor): Processed mask results, has
shape (num_instances, h, w).
Returns:
tuple: Formatted bbox and mask results.. It contains two items:
- bbox_results (list[np.ndarray]): BBox results of
single image. The list corresponds to each class.
each ndarray has a shape (N, 5), N is the number of
bboxes with this category, and last dimension
5 arrange as (x1, y1, x2, y2, scores).
- mask_results (list[np.ndarray]): Mask results of
single image. The list corresponds to each class.
each ndarray has shape (N, img_h, img_w), N
is the number of masks with this category.
"""
data_keys = results.keys()
assert 'scores' in data_keys
assert 'labels' in data_keys
assert 'masks' in data_keys, \
'results should contain ' \
'masks when format the results '
mask_results = [[] for _ in range(self.mask_head.num_classes)]
num_masks = len(results)
if num_masks == 0:
bbox_results = [
np.zeros((0, 5), dtype=np.float32)
for _ in range(self.mask_head.num_classes)
]
return bbox_results, mask_results
labels = results.labels.detach().cpu().numpy()
if 'bboxes' not in results:
# create dummy bbox results to store the scores
results.bboxes = results.scores.new_zeros(len(results), 4)
det_bboxes = torch.cat([results.bboxes, results.scores[:, None]],
dim=-1)
det_bboxes = det_bboxes.detach().cpu().numpy()
bbox_results = [
det_bboxes[labels == i, :]
for i in range(self.mask_head.num_classes)
]
masks = results.masks.detach().cpu().numpy()
for idx in range(num_masks):
mask = masks[idx]
mask_results[labels[idx]].append(mask)
return bbox_results, mask_results
def aug_test(self, imgs, img_metas, rescale=False):
raise NotImplementedError
def show_result(self,
img,
result,
score_thr=0.3,
bbox_color=(72, 101, 241),
text_color=(72, 101, 241),
mask_color=None,
thickness=2,
font_size=13,
win_name='',
show=False,
wait_time=0,
out_file=None):
"""Draw `result` over `img`.
Args:
img (str or Tensor): The image to be displayed.
result (tuple): Format bbox and mask results.
It contains two items:
- bbox_results (list[np.ndarray]): BBox results of
single image. The list corresponds to each class.
each ndarray has a shape (N, 5), N is the number of
bboxes with this category, and last dimension
5 arrange as (x1, y1, x2, y2, scores).
- mask_results (list[np.ndarray]): Mask results of
single image. The list corresponds to each class.
each ndarray has shape (N, img_h, img_w), N
is the number of masks with this category.
score_thr (float, optional): Minimum score of bboxes to be shown.
Default: 0.3.
bbox_color (str or tuple(int) or :obj:`Color`):Color of bbox lines.
The tuple of color should be in BGR order. Default: 'green'
text_color (str or tuple(int) or :obj:`Color`):Color of texts.
The tuple of color should be in BGR order. Default: 'green'
mask_color (None or str or tuple(int) or :obj:`Color`):
Color of masks. The tuple of color should be in BGR order.
Default: None
thickness (int): Thickness of lines. Default: 2
font_size (int): Font size of texts. Default: 13
win_name (str): The window name. Default: ''
wait_time (float): Value of waitKey param.
Default: 0.
show (bool): Whether to show the image.
Default: False.
out_file (str or None): The filename to write the image.
Default: None.
Returns:
img (Tensor): Only if not `show` or `out_file`
"""
assert isinstance(result, tuple)
bbox_result, mask_result = result
bboxes = np.vstack(bbox_result)
img = mmcv.imread(img)
img = img.copy()
labels = [
np.full(bbox.shape[0], i, dtype=np.int32)
for i, bbox in enumerate(bbox_result)
]
labels = np.concatenate(labels)
if len(labels) == 0:
bboxes = np.zeros([0, 5])
masks = np.zeros([0, 0, 0])
# draw segmentation masks
else:
masks = mmcv.concat_list(mask_result)
if isinstance(masks[0], torch.Tensor):
masks = torch.stack(masks, dim=0).detach().cpu().numpy()
else:
masks = np.stack(masks, axis=0)
# dummy bboxes
if bboxes[:, :4].sum() == 0:
num_masks = len(bboxes)
x_any = masks.any(axis=1)
y_any = masks.any(axis=2)
for idx in range(num_masks):
x = np.where(x_any[idx, :])[0]
y = np.where(y_any[idx, :])[0]
if len(x) > 0 and len(y) > 0:
bboxes[idx, :4] = np.array(
[x[0], y[0], x[-1] + 1, y[-1] + 1],
dtype=np.float32)
# if out_file specified, do not show image in window
if out_file is not None:
show = False
# draw bounding boxes
img = imshow_det_bboxes(
img,
bboxes,
labels,
masks,
class_names=self.CLASSES,
score_thr=score_thr,
bbox_color=bbox_color,
text_color=text_color,
mask_color=mask_color,
thickness=thickness,
font_size=font_size,
win_name=win_name,
show=show,
wait_time=wait_time,
out_file=out_file)
if not (show or out_file):
return img
| 13,785 | 36.873626 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/tood.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module()
class TOOD(SingleStageDetector):
r"""Implementation of `TOOD: Task-aligned One-stage Object Detection.
<https://arxiv.org/abs/2108.07755>`_."""
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None,
init_cfg=None):
super(TOOD, self).__init__(backbone, neck, bbox_head, train_cfg,
test_cfg, pretrained, init_cfg)
def set_epoch(self, epoch):
self.bbox_head.epoch = epoch
| 753 | 30.416667 | 73 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/htc.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .cascade_rcnn import CascadeRCNN
@DETECTORS.register_module()
class HybridTaskCascade(CascadeRCNN):
"""Implementation of `HTC <https://arxiv.org/abs/1901.07518>`_"""
def __init__(self, **kwargs):
super(HybridTaskCascade, self).__init__(**kwargs)
@property
def with_semantic(self):
"""bool: whether the detector has a semantic head"""
return self.roi_head.with_semantic
| 498 | 28.352941 | 69 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/__init__.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from .atss import ATSS
from .autoassign import AutoAssign
from .base import BaseDetector
from .cascade_rcnn import CascadeRCNN
from .centernet import CenterNet
from .cornernet import CornerNet
from .deformable_detr import DeformableDETR
from .detr import DETR
from .fast_rcnn import FastRCNN
from .faster_rcnn import FasterRCNN
from .fcos import FCOS
from .fovea import FOVEA
from .fsaf import FSAF
from .gfl import GFL
from .grid_rcnn import GridRCNN
from .htc import HybridTaskCascade
from .kd_one_stage import KnowledgeDistillationSingleStageDetector
from .lad import LAD
from .mask_rcnn import MaskRCNN
from .mask_scoring_rcnn import MaskScoringRCNN
from .nasfcos import NASFCOS
from .paa import PAA
from .panoptic_fpn import PanopticFPN
from .panoptic_two_stage_segmentor import TwoStagePanopticSegmentor
from .point_rend import PointRend
from .queryinst import QueryInst
from .reppoints_detector import RepPointsDetector
from .retinanet import RetinaNet
from .rpn import RPN
from .scnet import SCNet
from .single_stage import SingleStageDetector
from .solo import SOLO
from .sparse_rcnn import SparseRCNN
from .tood import TOOD
from .trident_faster_rcnn import TridentFasterRCNN
from .two_stage import TwoStageDetector
from .vfnet import VFNet
from .yolact import YOLACT
from .yolo import YOLOV3
from .yolof import YOLOF
from .yolox import YOLOX
from .dsla import DSLA
__all__ = [
'ATSS', 'BaseDetector', 'SingleStageDetector', 'TwoStageDetector', 'RPN',
'KnowledgeDistillationSingleStageDetector', 'FastRCNN', 'FasterRCNN',
'MaskRCNN', 'CascadeRCNN', 'HybridTaskCascade', 'RetinaNet', 'FCOS',
'GridRCNN', 'MaskScoringRCNN', 'RepPointsDetector', 'FOVEA', 'FSAF',
'NASFCOS', 'PointRend', 'GFL', 'CornerNet', 'PAA', 'YOLOV3', 'YOLACT',
'VFNet', 'DETR', 'TridentFasterRCNN', 'SparseRCNN', 'SCNet', 'SOLO',
'DeformableDETR', 'AutoAssign', 'YOLOF', 'CenterNet', 'YOLOX',
'TwoStagePanopticSegmentor', 'PanopticFPN', 'QueryInst', 'LAD', 'TOOD',
'DSLA'
]
| 2,038 | 35.410714 | 77 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/cornernet.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import torch
from mmdet.core import bbox2result, bbox_mapping_back
from ..builder import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module()
class CornerNet(SingleStageDetector):
"""CornerNet.
This detector is the implementation of the paper `CornerNet: Detecting
Objects as Paired Keypoints <https://arxiv.org/abs/1808.01244>`_ .
"""
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None,
init_cfg=None):
super(CornerNet, self).__init__(backbone, neck, bbox_head, train_cfg,
test_cfg, pretrained, init_cfg)
def merge_aug_results(self, aug_results, img_metas):
"""Merge augmented detection bboxes and score.
Args:
aug_results (list[list[Tensor]]): Det_bboxes and det_labels of each
image.
img_metas (list[list[dict]]): Meta information of each image, e.g.,
image size, scaling factor, etc.
Returns:
tuple: (bboxes, labels)
"""
recovered_bboxes, aug_labels = [], []
for bboxes_labels, img_info in zip(aug_results, img_metas):
img_shape = img_info[0]['img_shape'] # using shape before padding
scale_factor = img_info[0]['scale_factor']
flip = img_info[0]['flip']
bboxes, labels = bboxes_labels
bboxes, scores = bboxes[:, :4], bboxes[:, -1:]
bboxes = bbox_mapping_back(bboxes, img_shape, scale_factor, flip)
recovered_bboxes.append(torch.cat([bboxes, scores], dim=-1))
aug_labels.append(labels)
bboxes = torch.cat(recovered_bboxes, dim=0)
labels = torch.cat(aug_labels)
if bboxes.shape[0] > 0:
out_bboxes, out_labels = self.bbox_head._bboxes_nms(
bboxes, labels, self.bbox_head.test_cfg)
else:
out_bboxes, out_labels = bboxes, labels
return out_bboxes, out_labels
def aug_test(self, imgs, img_metas, rescale=False):
"""Augment testing of CornerNet.
Args:
imgs (list[Tensor]): Augmented images.
img_metas (list[list[dict]]): Meta information of each image, e.g.,
image size, scaling factor, etc.
rescale (bool): If True, return boxes in original image space.
Default: False.
Note:
``imgs`` must including flipped image pairs.
Returns:
list[list[np.ndarray]]: BBox results of each image and classes.
The outer list corresponds to each image. The inner list
corresponds to each class.
"""
img_inds = list(range(len(imgs)))
assert img_metas[0][0]['flip'] + img_metas[1][0]['flip'], (
'aug test must have flipped image pair')
aug_results = []
for ind, flip_ind in zip(img_inds[0::2], img_inds[1::2]):
img_pair = torch.cat([imgs[ind], imgs[flip_ind]])
x = self.extract_feat(img_pair)
outs = self.bbox_head(x)
bbox_list = self.bbox_head.get_bboxes(
*outs, [img_metas[ind], img_metas[flip_ind]], False, False)
aug_results.append(bbox_list[0])
aug_results.append(bbox_list[1])
bboxes, labels = self.merge_aug_results(aug_results, img_metas)
bbox_results = bbox2result(bboxes, labels, self.bbox_head.num_classes)
return [bbox_results]
| 3,668 | 36.438776 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/lad.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import torch
import torch.nn as nn
from mmcv.runner import load_checkpoint
from ..builder import DETECTORS, build_backbone, build_head, build_neck
from .kd_one_stage import KnowledgeDistillationSingleStageDetector
@DETECTORS.register_module()
class LAD(KnowledgeDistillationSingleStageDetector):
"""Implementation of `LAD <https://arxiv.org/pdf/2108.10520.pdf>`_."""
def __init__(self,
backbone,
neck,
bbox_head,
teacher_backbone,
teacher_neck,
teacher_bbox_head,
teacher_ckpt,
eval_teacher=True,
train_cfg=None,
test_cfg=None,
pretrained=None):
super(KnowledgeDistillationSingleStageDetector,
self).__init__(backbone, neck, bbox_head, train_cfg, test_cfg,
pretrained)
self.eval_teacher = eval_teacher
self.teacher_model = nn.Module()
self.teacher_model.backbone = build_backbone(teacher_backbone)
if teacher_neck is not None:
self.teacher_model.neck = build_neck(teacher_neck)
teacher_bbox_head.update(train_cfg=train_cfg)
teacher_bbox_head.update(test_cfg=test_cfg)
self.teacher_model.bbox_head = build_head(teacher_bbox_head)
if teacher_ckpt is not None:
load_checkpoint(
self.teacher_model, teacher_ckpt, map_location='cpu')
@property
def with_teacher_neck(self):
"""bool: whether the detector has a teacher_neck"""
return hasattr(self.teacher_model, 'neck') and \
self.teacher_model.neck is not None
def extract_teacher_feat(self, img):
"""Directly extract teacher features from the backbone+neck."""
x = self.teacher_model.backbone(img)
if self.with_teacher_neck:
x = self.teacher_model.neck(x)
return x
def forward_train(self,
img,
img_metas,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None):
"""
Args:
img (Tensor): Input images of shape (N, C, H, W).
Typically these should be mean centered and std scaled.
img_metas (list[dict]): A List of image info dict where each dict
has: 'img_shape', 'scale_factor', 'flip', and may also contain
'filename', 'ori_shape', 'pad_shape', and 'img_norm_cfg'.
For details on the values of these keys see
:class:`mmdet.datasets.pipelines.Collect`.
gt_bboxes (list[Tensor]): Each item are the truth boxes for each
image in [tl_x, tl_y, br_x, br_y] format.
gt_labels (list[Tensor]): Class indices corresponding to each box
gt_bboxes_ignore (None | list[Tensor]): Specify which bounding
boxes can be ignored when computing the loss.
Returns:
dict[str, Tensor]: A dictionary of loss components.
"""
# get label assignment from the teacher
with torch.no_grad():
x_teacher = self.extract_teacher_feat(img)
outs_teacher = self.teacher_model.bbox_head(x_teacher)
label_assignment_results = \
self.teacher_model.bbox_head.get_label_assignment(
*outs_teacher, gt_bboxes, gt_labels, img_metas,
gt_bboxes_ignore)
# the student use the label assignment from the teacher to learn
x = self.extract_feat(img)
losses = self.bbox_head.forward_train(x, label_assignment_results,
img_metas, gt_bboxes, gt_labels,
gt_bboxes_ignore)
return losses
| 3,916 | 41.11828 | 78 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/vfnet.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module()
class VFNet(SingleStageDetector):
"""Implementation of `VarifocalNet
(VFNet).<https://arxiv.org/abs/2008.13367>`_"""
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None,
init_cfg=None):
super(VFNet, self).__init__(backbone, neck, bbox_head, train_cfg,
test_cfg, pretrained, init_cfg)
| 658 | 30.380952 | 73 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/panoptic_fpn.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .panoptic_two_stage_segmentor import TwoStagePanopticSegmentor
@DETECTORS.register_module()
class PanopticFPN(TwoStagePanopticSegmentor):
r"""Implementation of `Panoptic feature pyramid
networks <https://arxiv.org/pdf/1901.02446>`_"""
def __init__(
self,
backbone,
neck=None,
rpn_head=None,
roi_head=None,
train_cfg=None,
test_cfg=None,
pretrained=None,
init_cfg=None,
# for panoptic segmentation
semantic_head=None,
panoptic_fusion_head=None):
super(PanopticFPN, self).__init__(
backbone=backbone,
neck=neck,
rpn_head=rpn_head,
roi_head=roi_head,
train_cfg=train_cfg,
test_cfg=test_cfg,
pretrained=pretrained,
init_cfg=init_cfg,
semantic_head=semantic_head,
panoptic_fusion_head=panoptic_fusion_head)
| 1,074 | 29.714286 | 67 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/sparse_rcnn.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .two_stage import TwoStageDetector
@DETECTORS.register_module()
class SparseRCNN(TwoStageDetector):
r"""Implementation of `Sparse R-CNN: End-to-End Object Detection with
Learnable Proposals <https://arxiv.org/abs/2011.12450>`_"""
def __init__(self, *args, **kwargs):
super(SparseRCNN, self).__init__(*args, **kwargs)
assert self.with_rpn, 'Sparse R-CNN and QueryInst ' \
'do not support external proposals'
def forward_train(self,
img,
img_metas,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=None,
gt_masks=None,
proposals=None,
**kwargs):
"""Forward function of SparseR-CNN and QueryInst in train stage.
Args:
img (Tensor): of shape (N, C, H, W) encoding input images.
Typically these should be mean centered and std scaled.
img_metas (list[dict]): list of image info dict where each dict
has: 'img_shape', 'scale_factor', 'flip', and may also contain
'filename', 'ori_shape', 'pad_shape', and 'img_norm_cfg'.
For details on the values of these keys see
:class:`mmdet.datasets.pipelines.Collect`.
gt_bboxes (list[Tensor]): Ground truth bboxes for each image with
shape (num_gts, 4) in [tl_x, tl_y, br_x, br_y] format.
gt_labels (list[Tensor]): class indices corresponding to each box
gt_bboxes_ignore (None | list[Tensor): specify which bounding
boxes can be ignored when computing the loss.
gt_masks (List[Tensor], optional) : Segmentation masks for
each box. This is required to train QueryInst.
proposals (List[Tensor], optional): override rpn proposals with
custom proposals. Use when `with_rpn` is False.
Returns:
dict[str, Tensor]: a dictionary of loss components
"""
assert proposals is None, 'Sparse R-CNN and QueryInst ' \
'do not support external proposals'
x = self.extract_feat(img)
proposal_boxes, proposal_features, imgs_whwh = \
self.rpn_head.forward_train(x, img_metas)
roi_losses = self.roi_head.forward_train(
x,
proposal_boxes,
proposal_features,
img_metas,
gt_bboxes,
gt_labels,
gt_bboxes_ignore=gt_bboxes_ignore,
gt_masks=gt_masks,
imgs_whwh=imgs_whwh)
return roi_losses
def simple_test(self, img, img_metas, rescale=False):
"""Test function without test time augmentation.
Args:
imgs (list[torch.Tensor]): List of multiple images
img_metas (list[dict]): List of image information.
rescale (bool): Whether to rescale the results.
Defaults to False.
Returns:
list[list[np.ndarray]]: BBox results of each image and classes.
The outer list corresponds to each image. The inner list
corresponds to each class.
"""
x = self.extract_feat(img)
proposal_boxes, proposal_features, imgs_whwh = \
self.rpn_head.simple_test_rpn(x, img_metas)
results = self.roi_head.simple_test(
x,
proposal_boxes,
proposal_features,
img_metas,
imgs_whwh=imgs_whwh,
rescale=rescale)
return results
def forward_dummy(self, img):
"""Used for computing network flops.
See `mmdetection/tools/analysis_tools/get_flops.py`
"""
# backbone
x = self.extract_feat(img)
# rpn
num_imgs = len(img)
dummy_img_metas = [
dict(img_shape=(800, 1333, 3)) for _ in range(num_imgs)
]
proposal_boxes, proposal_features, imgs_whwh = \
self.rpn_head.simple_test_rpn(x, dummy_img_metas)
# roi_head
roi_outs = self.roi_head.forward_dummy(x, proposal_boxes,
proposal_features,
dummy_img_metas)
return roi_outs
| 4,406 | 38.348214 | 78 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/mask_scoring_rcnn.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .two_stage import TwoStageDetector
@DETECTORS.register_module()
class MaskScoringRCNN(TwoStageDetector):
"""Mask Scoring RCNN.
https://arxiv.org/abs/1903.00241
"""
def __init__(self,
backbone,
rpn_head,
roi_head,
train_cfg,
test_cfg,
neck=None,
pretrained=None,
init_cfg=None):
super(MaskScoringRCNN, self).__init__(
backbone=backbone,
neck=neck,
rpn_head=rpn_head,
roi_head=roi_head,
train_cfg=train_cfg,
test_cfg=test_cfg,
pretrained=pretrained,
init_cfg=init_cfg)
| 812 | 25.225806 | 47 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/detectors/yolof.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from ..builder import DETECTORS
from .single_stage import SingleStageDetector
@DETECTORS.register_module()
class YOLOF(SingleStageDetector):
r"""Implementation of `You Only Look One-level Feature
<https://arxiv.org/abs/2103.09460>`_"""
def __init__(self,
backbone,
neck,
bbox_head,
train_cfg=None,
test_cfg=None,
pretrained=None):
super(YOLOF, self).__init__(backbone, neck, bbox_head, train_cfg,
test_cfg, pretrained)
| 628 | 30.45 | 73 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/seg_heads/base_semantic_head.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from abc import ABCMeta, abstractmethod
import torch.nn.functional as F
from mmcv.runner import BaseModule, force_fp32
from ..builder import build_loss
from ..utils import interpolate_as
class BaseSemanticHead(BaseModule, metaclass=ABCMeta):
"""Base module of Semantic Head.
Args:
num_classes (int): the number of classes.
init_cfg (dict): the initialization config.
loss_seg (dict): the loss of the semantic head.
"""
def __init__(self,
num_classes,
init_cfg=None,
loss_seg=dict(
type='CrossEntropyLoss',
ignore_index=255,
loss_weight=1.0)):
super(BaseSemanticHead, self).__init__(init_cfg)
self.loss_seg = build_loss(loss_seg)
self.num_classes = num_classes
@force_fp32(apply_to=('seg_preds', ))
def loss(self, seg_preds, gt_semantic_seg):
"""Get the loss of semantic head.
Args:
seg_preds (Tensor): The input logits with the shape (N, C, H, W).
gt_semantic_seg: The ground truth of semantic segmentation with
the shape (N, H, W).
label_bias: The starting number of the semantic label.
Default: 1.
Returns:
dict: the loss of semantic head.
"""
if seg_preds.shape[-2:] != gt_semantic_seg.shape[-2:]:
seg_preds = interpolate_as(seg_preds, gt_semantic_seg)
seg_preds = seg_preds.permute((0, 2, 3, 1))
loss_seg = self.loss_seg(
seg_preds.reshape(-1, self.num_classes), # => [NxHxW, C]
gt_semantic_seg.reshape(-1).long())
return dict(loss_seg=loss_seg)
@abstractmethod
def forward(self, x):
"""Placeholder of forward function.
Returns:
dict[str, Tensor]: A dictionary, including features
and predicted scores. Required keys: 'seg_preds'
and 'feats'.
"""
pass
def forward_train(self, x, gt_semantic_seg):
output = self.forward(x)
seg_preds = output['seg_preds']
return self.loss(seg_preds, gt_semantic_seg)
def simple_test(self, x, img_metas, rescale=False):
output = self.forward(x)
seg_preds = output['seg_preds']
seg_preds = F.interpolate(
seg_preds,
size=img_metas[0]['pad_shape'][:2],
mode='bilinear',
align_corners=False)
if rescale:
h, w, _ = img_metas[0]['img_shape']
seg_preds = seg_preds[:, :, :h, :w]
h, w, _ = img_metas[0]['ori_shape']
seg_preds = F.interpolate(
seg_preds, size=(h, w), mode='bilinear', align_corners=False)
return seg_preds
| 2,849 | 31.758621 | 77 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/seg_heads/panoptic_fpn_head.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import warnings
import torch
import torch.nn as nn
from mmcv.runner import ModuleList
from ..builder import HEADS
from ..utils import ConvUpsample
from .base_semantic_head import BaseSemanticHead
@HEADS.register_module()
class PanopticFPNHead(BaseSemanticHead):
"""PanopticFPNHead used in Panoptic FPN.
In this head, the number of output channels is ``num_stuff_classes
+ 1``, including all stuff classes and one thing class. The stuff
classes will be reset from ``0`` to ``num_stuff_classes - 1``, the
thing classes will be merged to ``num_stuff_classes``-th channel.
Arg:
num_things_classes (int): Number of thing classes. Default: 80.
num_stuff_classes (int): Number of stuff classes. Default: 53.
num_classes (int): Number of classes, including all stuff
classes and one thing class. This argument is deprecated,
please use ``num_things_classes`` and ``num_stuff_classes``.
The module will automatically infer the num_classes by
``num_stuff_classes + 1``.
in_channels (int): Number of channels in the input feature
map.
inner_channels (int): Number of channels in inner features.
start_level (int): The start level of the input features
used in PanopticFPN.
end_level (int): The end level of the used features, the
``end_level``-th layer will not be used.
fg_range (tuple): Range of the foreground classes. It starts
from ``0`` to ``num_things_classes-1``. Deprecated, please use
``num_things_classes`` directly.
bg_range (tuple): Range of the background classes. It starts
from ``num_things_classes`` to ``num_things_classes +
num_stuff_classes - 1``. Deprecated, please use
``num_stuff_classes`` and ``num_things_classes`` directly.
conv_cfg (dict): Dictionary to construct and config
conv layer. Default: None.
norm_cfg (dict): Dictionary to construct and config norm layer.
Use ``GN`` by default.
init_cfg (dict or list[dict], optional): Initialization config dict.
loss_seg (dict): the loss of the semantic head.
"""
def __init__(self,
num_things_classes=80,
num_stuff_classes=53,
num_classes=None,
in_channels=256,
inner_channels=128,
start_level=0,
end_level=4,
fg_range=None,
bg_range=None,
conv_cfg=None,
norm_cfg=dict(type='GN', num_groups=32, requires_grad=True),
init_cfg=None,
loss_seg=dict(
type='CrossEntropyLoss', ignore_index=-1,
loss_weight=1.0)):
if num_classes is not None:
warnings.warn(
'`num_classes` is deprecated now, please set '
'`num_stuff_classes` directly, the `num_classes` will be '
'set to `num_stuff_classes + 1`')
# num_classes = num_stuff_classes + 1 for PanopticFPN.
assert num_classes == num_stuff_classes + 1
super(PanopticFPNHead, self).__init__(num_stuff_classes + 1, init_cfg,
loss_seg)
self.num_things_classes = num_things_classes
self.num_stuff_classes = num_stuff_classes
if fg_range is not None and bg_range is not None:
self.fg_range = fg_range
self.bg_range = bg_range
self.num_things_classes = fg_range[1] - fg_range[0] + 1
self.num_stuff_classes = bg_range[1] - bg_range[0] + 1
warnings.warn(
'`fg_range` and `bg_range` are deprecated now, '
f'please use `num_things_classes`={self.num_things_classes} '
f'and `num_stuff_classes`={self.num_stuff_classes} instead.')
# Used feature layers are [start_level, end_level)
self.start_level = start_level
self.end_level = end_level
self.num_stages = end_level - start_level
self.inner_channels = inner_channels
self.conv_upsample_layers = ModuleList()
for i in range(start_level, end_level):
self.conv_upsample_layers.append(
ConvUpsample(
in_channels,
inner_channels,
num_layers=i if i > 0 else 1,
num_upsample=i if i > 0 else 0,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg,
))
self.conv_logits = nn.Conv2d(inner_channels, self.num_classes, 1)
def _set_things_to_void(self, gt_semantic_seg):
"""Merge thing classes to one class.
In PanopticFPN, the background labels will be reset from `0` to
`self.num_stuff_classes-1`, the foreground labels will be merged to
`self.num_stuff_classes`-th channel.
"""
gt_semantic_seg = gt_semantic_seg.int()
fg_mask = gt_semantic_seg < self.num_things_classes
bg_mask = (gt_semantic_seg >= self.num_things_classes) * (
gt_semantic_seg < self.num_things_classes + self.num_stuff_classes)
new_gt_seg = torch.clone(gt_semantic_seg)
new_gt_seg = torch.where(bg_mask,
gt_semantic_seg - self.num_things_classes,
new_gt_seg)
new_gt_seg = torch.where(fg_mask,
fg_mask.int() * self.num_stuff_classes,
new_gt_seg)
return new_gt_seg
def loss(self, seg_preds, gt_semantic_seg):
"""The loss of PanopticFPN head.
Things classes will be merged to one class in PanopticFPN.
"""
gt_semantic_seg = self._set_things_to_void(gt_semantic_seg)
return super().loss(seg_preds, gt_semantic_seg)
def init_weights(self):
super().init_weights()
nn.init.normal_(self.conv_logits.weight.data, 0, 0.01)
self.conv_logits.bias.data.zero_()
def forward(self, x):
# the number of subnets must be not more than
# the length of features.
assert self.num_stages <= len(x)
feats = []
for i, layer in enumerate(self.conv_upsample_layers):
f = layer(x[self.start_level + i])
feats.append(f)
feats = torch.sum(torch.stack(feats, dim=0), dim=0)
seg_preds = self.conv_logits(feats)
out = dict(seg_preds=seg_preds, feats=feats)
return out
| 6,675 | 41.794872 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/seg_heads/__init__.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from .panoptic_fpn_head import PanopticFPNHead # noqa: F401,F403
from .panoptic_fusion_heads import * # noqa: F401,F403
| 170 | 41.75 | 65 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/seg_heads/panoptic_fusion_heads/heuristic_fusion_head.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import torch
from mmdet.datasets.coco_panoptic import INSTANCE_OFFSET
from mmdet.models.builder import HEADS
from .base_panoptic_fusion_head import BasePanopticFusionHead
@HEADS.register_module()
class HeuristicFusionHead(BasePanopticFusionHead):
"""Fusion Head with Heuristic method."""
def __init__(self,
num_things_classes=80,
num_stuff_classes=53,
test_cfg=None,
init_cfg=None,
**kwargs):
super(HeuristicFusionHead,
self).__init__(num_things_classes, num_stuff_classes, test_cfg,
None, init_cfg, **kwargs)
def forward_train(self, gt_masks=None, gt_semantic_seg=None, **kwargs):
"""HeuristicFusionHead has no training loss."""
return dict()
def _lay_masks(self, bboxes, labels, masks, overlap_thr=0.5):
"""Lay instance masks to a result map.
Args:
bboxes: The bboxes results, (K, 4).
labels: The labels of bboxes, (K, ).
masks: The instance masks, (K, H, W).
overlap_thr: Threshold to determine whether two masks overlap.
default: 0.5.
Returns:
Tensor: The result map, (H, W).
"""
num_insts = bboxes.shape[0]
id_map = torch.zeros(
masks.shape[-2:], device=bboxes.device, dtype=torch.long)
if num_insts == 0:
return id_map, labels
scores, bboxes = bboxes[:, -1], bboxes[:, :4]
# Sort by score to use heuristic fusion
order = torch.argsort(-scores)
bboxes = bboxes[order]
labels = labels[order]
segm_masks = masks[order]
instance_id = 1
left_labels = []
for idx in range(bboxes.shape[0]):
_cls = labels[idx]
_mask = segm_masks[idx]
instance_id_map = torch.ones_like(
_mask, dtype=torch.long) * instance_id
area = _mask.sum()
if area == 0:
continue
pasted = id_map > 0
intersect = (_mask * pasted).sum()
if (intersect / (area + 1e-5)) > overlap_thr:
continue
_part = _mask * (~pasted)
id_map = torch.where(_part, instance_id_map, id_map)
left_labels.append(_cls)
instance_id += 1
if len(left_labels) > 0:
instance_labels = torch.stack(left_labels)
else:
instance_labels = bboxes.new_zeros((0, ), dtype=torch.long)
assert instance_id == (len(instance_labels) + 1)
return id_map, instance_labels
def simple_test(self, det_bboxes, det_labels, mask_preds, seg_preds,
**kwargs):
"""Fuse the results of instance and semantic segmentations.
Args:
det_bboxes: The bboxes results, (K, 4).
det_labels: The labels of bboxes, (K,).
mask_preds: The masks results, (K, H, W).
seg_preds: The semantic segmentation results,
(K, num_stuff + 1, H, W).
Returns:
Tensor : The panoptic segmentation result, (H, W).
"""
mask_preds = mask_preds >= self.test_cfg.mask_thr_binary
id_map, labels = self._lay_masks(det_bboxes, det_labels, mask_preds,
self.test_cfg.mask_overlap)
seg_results = seg_preds.argmax(dim=0)
seg_results = seg_results + self.num_things_classes
pan_results = seg_results
instance_id = 1
for idx in range(det_labels.shape[0]):
_mask = id_map == (idx + 1)
if _mask.sum() == 0:
continue
_cls = labels[idx]
# simply trust detection
segment_id = _cls + instance_id * INSTANCE_OFFSET
pan_results[_mask] = segment_id
instance_id += 1
ids, counts = torch.unique(
pan_results % INSTANCE_OFFSET, return_counts=True)
stuff_ids = ids[ids >= self.num_things_classes]
stuff_counts = counts[ids >= self.num_things_classes]
ignore_stuff_ids = stuff_ids[
stuff_counts < self.test_cfg.stuff_area_limit]
assert pan_results.ndim == 2
pan_results[(pan_results.unsqueeze(2) == ignore_stuff_ids.reshape(
1, 1, -1)).any(dim=2)] = self.num_classes
return pan_results
| 4,474 | 34.23622 | 77 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/seg_heads/panoptic_fusion_heads/__init__.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from .base_panoptic_fusion_head import \
BasePanopticFusionHead # noqa: F401,F403
from .heuristic_fusion_head import HeuristicFusionHead # noqa: F401,F403
| 209 | 41 | 73 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/seg_heads/panoptic_fusion_heads/base_panoptic_fusion_head.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from abc import ABCMeta, abstractmethod
from mmcv.runner import BaseModule
from ...builder import build_loss
class BasePanopticFusionHead(BaseModule, metaclass=ABCMeta):
"""Base class for panoptic heads."""
def __init__(self,
num_things_classes=80,
num_stuff_classes=53,
test_cfg=None,
loss_panoptic=None,
init_cfg=None,
**kwargs):
super(BasePanopticFusionHead, self).__init__(init_cfg)
self.num_things_classes = num_things_classes
self.num_stuff_classes = num_stuff_classes
self.num_classes = num_things_classes + num_stuff_classes
self.test_cfg = test_cfg
if loss_panoptic:
self.loss_panoptic = build_loss(loss_panoptic)
else:
self.loss_panoptic = None
@property
def with_loss(self):
"""bool: whether the panoptic head contains loss function."""
return self.loss_panoptic is not None
@abstractmethod
def forward_train(self, gt_masks=None, gt_semantic_seg=None, **kwargs):
"""Forward function during training."""
@abstractmethod
def simple_test(self,
img_metas,
det_labels,
mask_preds,
seg_preds,
det_bboxes,
cfg=None,
**kwargs):
"""Test without augmentation."""
| 1,507 | 29.77551 | 75 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/plugins/dropblock.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import torch
import torch.nn as nn
import torch.nn.functional as F
from mmcv.cnn import PLUGIN_LAYERS
eps = 1e-6
@PLUGIN_LAYERS.register_module()
class DropBlock(nn.Module):
"""Randomly drop some regions of feature maps.
Please refer to the method proposed in `DropBlock
<https://arxiv.org/abs/1810.12890>`_ for details.
Args:
drop_prob (float): The probability of dropping each block.
block_size (int): The size of dropped blocks.
warmup_iters (int): The drop probability will linearly increase
from `0` to `drop_prob` during the first `warmup_iters` iterations.
Default: 2000.
"""
def __init__(self, drop_prob, block_size, warmup_iters=2000, **kwargs):
super(DropBlock, self).__init__()
assert block_size % 2 == 1
assert 0 < drop_prob <= 1
assert warmup_iters >= 0
self.drop_prob = drop_prob
self.block_size = block_size
self.warmup_iters = warmup_iters
self.iter_cnt = 0
def forward(self, x):
"""
Args:
x (Tensor): Input feature map on which some areas will be randomly
dropped.
Returns:
Tensor: The tensor after DropBlock layer.
"""
if not self.training:
return x
self.iter_cnt += 1
N, C, H, W = list(x.shape)
gamma = self._compute_gamma((H, W))
mask_shape = (N, C, H - self.block_size + 1, W - self.block_size + 1)
mask = torch.bernoulli(torch.full(mask_shape, gamma, device=x.device))
mask = F.pad(mask, [self.block_size // 2] * 4, value=0)
mask = F.max_pool2d(
input=mask,
stride=(1, 1),
kernel_size=(self.block_size, self.block_size),
padding=self.block_size // 2)
mask = 1 - mask
x = x * mask * mask.numel() / (eps + mask.sum())
return x
def _compute_gamma(self, feat_size):
"""Compute the value of gamma according to paper. gamma is the
parameter of bernoulli distribution, which controls the number of
features to drop.
gamma = (drop_prob * fm_area) / (drop_area * keep_area)
Args:
feat_size (tuple[int, int]): The height and width of feature map.
Returns:
float: The value of gamma.
"""
gamma = (self.drop_prob * feat_size[0] * feat_size[1])
gamma /= ((feat_size[0] - self.block_size + 1) *
(feat_size[1] - self.block_size + 1))
gamma /= (self.block_size**2)
factor = (1.0 if self.iter_cnt > self.warmup_iters else self.iter_cnt /
self.warmup_iters)
return gamma * factor
def extra_repr(self):
return (f'drop_prob={self.drop_prob}, block_size={self.block_size}, '
f'warmup_iters={self.warmup_iters}')
| 2,925 | 33.023256 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/plugins/__init__.py
|
# Copyright (c) OpenMMLab. All rights reserved.
from .dropblock import DropBlock
__all__ = ['DropBlock']
| 106 | 20.4 | 47 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/necks/yolox_pafpn.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import math
import torch
import torch.nn as nn
from mmcv.cnn import ConvModule, DepthwiseSeparableConvModule
from mmcv.runner import BaseModule
from ..builder import NECKS
from ..utils import CSPLayer
@NECKS.register_module()
class YOLOXPAFPN(BaseModule):
"""Path Aggregation Network used in YOLOX.
Args:
in_channels (List[int]): Number of input channels per scale.
out_channels (int): Number of output channels (used at each scale)
num_csp_blocks (int): Number of bottlenecks in CSPLayer. Default: 3
use_depthwise (bool): Whether to depthwise separable convolution in
blocks. Default: False
upsample_cfg (dict): Config dict for interpolate layer.
Default: `dict(scale_factor=2, mode='nearest')`
conv_cfg (dict, optional): Config dict for convolution layer.
Default: None, which means using conv2d.
norm_cfg (dict): Config dict for normalization layer.
Default: dict(type='BN')
act_cfg (dict): Config dict for activation layer.
Default: dict(type='Swish')
init_cfg (dict or list[dict], optional): Initialization config dict.
Default: None.
"""
def __init__(self,
in_channels,
out_channels,
num_csp_blocks=3,
use_depthwise=False,
upsample_cfg=dict(scale_factor=2, mode='nearest'),
conv_cfg=None,
norm_cfg=dict(type='BN', momentum=0.03, eps=0.001),
act_cfg=dict(type='Swish'),
init_cfg=dict(
type='Kaiming',
layer='Conv2d',
a=math.sqrt(5),
distribution='uniform',
mode='fan_in',
nonlinearity='leaky_relu')):
super(YOLOXPAFPN, self).__init__(init_cfg)
self.in_channels = in_channels
self.out_channels = out_channels
conv = DepthwiseSeparableConvModule if use_depthwise else ConvModule
# build top-down blocks
self.upsample = nn.Upsample(**upsample_cfg)
self.reduce_layers = nn.ModuleList()
self.top_down_blocks = nn.ModuleList()
for idx in range(len(in_channels) - 1, 0, -1):
self.reduce_layers.append(
ConvModule(
in_channels[idx],
in_channels[idx - 1],
1,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg,
act_cfg=act_cfg))
self.top_down_blocks.append(
CSPLayer(
in_channels[idx - 1] * 2,
in_channels[idx - 1],
num_blocks=num_csp_blocks,
add_identity=False,
use_depthwise=use_depthwise,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg,
act_cfg=act_cfg))
# build bottom-up blocks
self.downsamples = nn.ModuleList()
self.bottom_up_blocks = nn.ModuleList()
for idx in range(len(in_channels) - 1):
self.downsamples.append(
conv(
in_channels[idx],
in_channels[idx],
3,
stride=2,
padding=1,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg,
act_cfg=act_cfg))
self.bottom_up_blocks.append(
CSPLayer(
in_channels[idx] * 2,
in_channels[idx + 1],
num_blocks=num_csp_blocks,
add_identity=False,
use_depthwise=use_depthwise,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg,
act_cfg=act_cfg))
self.out_convs = nn.ModuleList()
for i in range(len(in_channels)):
self.out_convs.append(
ConvModule(
in_channels[i],
out_channels,
1,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg,
act_cfg=act_cfg))
def forward(self, inputs):
"""
Args:
inputs (tuple[Tensor]): input features.
Returns:
tuple[Tensor]: YOLOXPAFPN features.
"""
assert len(inputs) == len(self.in_channels)
# top-down path
inner_outs = [inputs[-1]]
for idx in range(len(self.in_channels) - 1, 0, -1):
feat_heigh = inner_outs[0]
feat_low = inputs[idx - 1]
feat_heigh = self.reduce_layers[len(self.in_channels) - 1 - idx](
feat_heigh)
inner_outs[0] = feat_heigh
upsample_feat = self.upsample(feat_heigh)
inner_out = self.top_down_blocks[len(self.in_channels) - 1 - idx](
torch.cat([upsample_feat, feat_low], 1))
inner_outs.insert(0, inner_out)
# bottom-up path
outs = [inner_outs[0]]
for idx in range(len(self.in_channels) - 1):
feat_low = outs[-1]
feat_height = inner_outs[idx + 1]
downsample_feat = self.downsamples[idx](feat_low)
out = self.bottom_up_blocks[idx](
torch.cat([downsample_feat, feat_height], 1))
outs.append(out)
# out convs
for idx, conv in enumerate(self.out_convs):
outs[idx] = conv(outs[idx])
return tuple(outs)
| 5,647 | 34.974522 | 78 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/necks/ssd_neck.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import torch
import torch.nn as nn
from mmcv.cnn import ConvModule, DepthwiseSeparableConvModule
from mmcv.runner import BaseModule
from ..builder import NECKS
@NECKS.register_module()
class SSDNeck(BaseModule):
"""Extra layers of SSD backbone to generate multi-scale feature maps.
Args:
in_channels (Sequence[int]): Number of input channels per scale.
out_channels (Sequence[int]): Number of output channels per scale.
level_strides (Sequence[int]): Stride of 3x3 conv per level.
level_paddings (Sequence[int]): Padding size of 3x3 conv per level.
l2_norm_scale (float|None): L2 normalization layer init scale.
If None, not use L2 normalization on the first input feature.
last_kernel_size (int): Kernel size of the last conv layer.
Default: 3.
use_depthwise (bool): Whether to use DepthwiseSeparableConv.
Default: False.
conv_cfg (dict): Config dict for convolution layer. Default: None.
norm_cfg (dict): Dictionary to construct and config norm layer.
Default: None.
act_cfg (dict): Config dict for activation layer.
Default: dict(type='ReLU').
init_cfg (dict or list[dict], optional): Initialization config dict.
"""
def __init__(self,
in_channels,
out_channels,
level_strides,
level_paddings,
l2_norm_scale=20.,
last_kernel_size=3,
use_depthwise=False,
conv_cfg=None,
norm_cfg=None,
act_cfg=dict(type='ReLU'),
init_cfg=[
dict(
type='Xavier', distribution='uniform',
layer='Conv2d'),
dict(type='Constant', val=1, layer='BatchNorm2d'),
]):
super(SSDNeck, self).__init__(init_cfg)
assert len(out_channels) > len(in_channels)
assert len(out_channels) - len(in_channels) == len(level_strides)
assert len(level_strides) == len(level_paddings)
assert in_channels == out_channels[:len(in_channels)]
if l2_norm_scale:
self.l2_norm = L2Norm(in_channels[0], l2_norm_scale)
self.init_cfg += [
dict(
type='Constant',
val=self.l2_norm.scale,
override=dict(name='l2_norm'))
]
self.extra_layers = nn.ModuleList()
extra_layer_channels = out_channels[len(in_channels):]
second_conv = DepthwiseSeparableConvModule if \
use_depthwise else ConvModule
for i, (out_channel, stride, padding) in enumerate(
zip(extra_layer_channels, level_strides, level_paddings)):
kernel_size = last_kernel_size \
if i == len(extra_layer_channels) - 1 else 3
per_lvl_convs = nn.Sequential(
ConvModule(
out_channels[len(in_channels) - 1 + i],
out_channel // 2,
1,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg,
act_cfg=act_cfg),
second_conv(
out_channel // 2,
out_channel,
kernel_size,
stride=stride,
padding=padding,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg,
act_cfg=act_cfg))
self.extra_layers.append(per_lvl_convs)
def forward(self, inputs):
"""Forward function."""
outs = [feat for feat in inputs]
if hasattr(self, 'l2_norm'):
outs[0] = self.l2_norm(outs[0])
feat = outs[-1]
for layer in self.extra_layers:
feat = layer(feat)
outs.append(feat)
return tuple(outs)
class L2Norm(nn.Module):
def __init__(self, n_dims, scale=20., eps=1e-10):
"""L2 normalization layer.
Args:
n_dims (int): Number of dimensions to be normalized
scale (float, optional): Defaults to 20..
eps (float, optional): Used to avoid division by zero.
Defaults to 1e-10.
"""
super(L2Norm, self).__init__()
self.n_dims = n_dims
self.weight = nn.Parameter(torch.Tensor(self.n_dims))
self.eps = eps
self.scale = scale
def forward(self, x):
"""Forward function."""
# normalization layer convert to FP32 in FP16 training
x_float = x.float()
norm = x_float.pow(2).sum(1, keepdim=True).sqrt() + self.eps
return (self.weight[None, :, None, None].float().expand_as(x_float) *
x_float / norm).type_as(x)
| 4,891 | 36.630769 | 77 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/necks/rfp.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import torch
import torch.nn as nn
import torch.nn.functional as F
from mmcv.cnn import constant_init, xavier_init
from mmcv.runner import BaseModule, ModuleList
from ..builder import NECKS, build_backbone
from .fpn import FPN
class ASPP(BaseModule):
"""ASPP (Atrous Spatial Pyramid Pooling)
This is an implementation of the ASPP module used in DetectoRS
(https://arxiv.org/pdf/2006.02334.pdf)
Args:
in_channels (int): Number of input channels.
out_channels (int): Number of channels produced by this module
dilations (tuple[int]): Dilations of the four branches.
Default: (1, 3, 6, 1)
init_cfg (dict or list[dict], optional): Initialization config dict.
"""
def __init__(self,
in_channels,
out_channels,
dilations=(1, 3, 6, 1),
init_cfg=dict(type='Kaiming', layer='Conv2d')):
super().__init__(init_cfg)
assert dilations[-1] == 1
self.aspp = nn.ModuleList()
for dilation in dilations:
kernel_size = 3 if dilation > 1 else 1
padding = dilation if dilation > 1 else 0
conv = nn.Conv2d(
in_channels,
out_channels,
kernel_size=kernel_size,
stride=1,
dilation=dilation,
padding=padding,
bias=True)
self.aspp.append(conv)
self.gap = nn.AdaptiveAvgPool2d(1)
def forward(self, x):
avg_x = self.gap(x)
out = []
for aspp_idx in range(len(self.aspp)):
inp = avg_x if (aspp_idx == len(self.aspp) - 1) else x
out.append(F.relu_(self.aspp[aspp_idx](inp)))
out[-1] = out[-1].expand_as(out[-2])
out = torch.cat(out, dim=1)
return out
@NECKS.register_module()
class RFP(FPN):
"""RFP (Recursive Feature Pyramid)
This is an implementation of RFP in `DetectoRS
<https://arxiv.org/pdf/2006.02334.pdf>`_. Different from standard FPN, the
input of RFP should be multi level features along with origin input image
of backbone.
Args:
rfp_steps (int): Number of unrolled steps of RFP.
rfp_backbone (dict): Configuration of the backbone for RFP.
aspp_out_channels (int): Number of output channels of ASPP module.
aspp_dilations (tuple[int]): Dilation rates of four branches.
Default: (1, 3, 6, 1)
init_cfg (dict or list[dict], optional): Initialization config dict.
Default: None
"""
def __init__(self,
rfp_steps,
rfp_backbone,
aspp_out_channels,
aspp_dilations=(1, 3, 6, 1),
init_cfg=None,
**kwargs):
assert init_cfg is None, 'To prevent abnormal initialization ' \
'behavior, init_cfg is not allowed to be set'
super().__init__(init_cfg=init_cfg, **kwargs)
self.rfp_steps = rfp_steps
# Be careful! Pretrained weights cannot be loaded when use
# nn.ModuleList
self.rfp_modules = ModuleList()
for rfp_idx in range(1, rfp_steps):
rfp_module = build_backbone(rfp_backbone)
self.rfp_modules.append(rfp_module)
self.rfp_aspp = ASPP(self.out_channels, aspp_out_channels,
aspp_dilations)
self.rfp_weight = nn.Conv2d(
self.out_channels,
1,
kernel_size=1,
stride=1,
padding=0,
bias=True)
def init_weights(self):
# Avoid using super().init_weights(), which may alter the default
# initialization of the modules in self.rfp_modules that have missing
# keys in the pretrained checkpoint.
for convs in [self.lateral_convs, self.fpn_convs]:
for m in convs.modules():
if isinstance(m, nn.Conv2d):
xavier_init(m, distribution='uniform')
for rfp_idx in range(self.rfp_steps - 1):
self.rfp_modules[rfp_idx].init_weights()
constant_init(self.rfp_weight, 0)
def forward(self, inputs):
inputs = list(inputs)
assert len(inputs) == len(self.in_channels) + 1 # +1 for input image
img = inputs.pop(0)
# FPN forward
x = super().forward(tuple(inputs))
for rfp_idx in range(self.rfp_steps - 1):
rfp_feats = [x[0]] + list(
self.rfp_aspp(x[i]) for i in range(1, len(x)))
x_idx = self.rfp_modules[rfp_idx].rfp_forward(img, rfp_feats)
# FPN forward
x_idx = super().forward(x_idx)
x_new = []
for ft_idx in range(len(x_idx)):
add_weight = torch.sigmoid(self.rfp_weight(x_idx[ft_idx]))
x_new.append(add_weight * x_idx[ft_idx] +
(1 - add_weight) * x[ft_idx])
x = x_new
return x
| 5,052 | 36.154412 | 78 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/necks/dilated_encoder.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import torch.nn as nn
from mmcv.cnn import (ConvModule, caffe2_xavier_init, constant_init, is_norm,
normal_init)
from torch.nn import BatchNorm2d
from ..builder import NECKS
class Bottleneck(nn.Module):
"""Bottleneck block for DilatedEncoder used in `YOLOF.
<https://arxiv.org/abs/2103.09460>`.
The Bottleneck contains three ConvLayers and one residual connection.
Args:
in_channels (int): The number of input channels.
mid_channels (int): The number of middle output channels.
dilation (int): Dilation rate.
norm_cfg (dict): Dictionary to construct and config norm layer.
"""
def __init__(self,
in_channels,
mid_channels,
dilation,
norm_cfg=dict(type='BN', requires_grad=True)):
super(Bottleneck, self).__init__()
self.conv1 = ConvModule(
in_channels, mid_channels, 1, norm_cfg=norm_cfg)
self.conv2 = ConvModule(
mid_channels,
mid_channels,
3,
padding=dilation,
dilation=dilation,
norm_cfg=norm_cfg)
self.conv3 = ConvModule(
mid_channels, in_channels, 1, norm_cfg=norm_cfg)
def forward(self, x):
identity = x
out = self.conv1(x)
out = self.conv2(out)
out = self.conv3(out)
out = out + identity
return out
@NECKS.register_module()
class DilatedEncoder(nn.Module):
"""Dilated Encoder for YOLOF <https://arxiv.org/abs/2103.09460>`.
This module contains two types of components:
- the original FPN lateral convolution layer and fpn convolution layer,
which are 1x1 conv + 3x3 conv
- the dilated residual block
Args:
in_channels (int): The number of input channels.
out_channels (int): The number of output channels.
block_mid_channels (int): The number of middle block output channels
num_residual_blocks (int): The number of residual blocks.
"""
def __init__(self, in_channels, out_channels, block_mid_channels,
num_residual_blocks):
super(DilatedEncoder, self).__init__()
self.in_channels = in_channels
self.out_channels = out_channels
self.block_mid_channels = block_mid_channels
self.num_residual_blocks = num_residual_blocks
self.block_dilations = [2, 4, 6, 8]
self._init_layers()
def _init_layers(self):
self.lateral_conv = nn.Conv2d(
self.in_channels, self.out_channels, kernel_size=1)
self.lateral_norm = BatchNorm2d(self.out_channels)
self.fpn_conv = nn.Conv2d(
self.out_channels, self.out_channels, kernel_size=3, padding=1)
self.fpn_norm = BatchNorm2d(self.out_channels)
encoder_blocks = []
for i in range(self.num_residual_blocks):
dilation = self.block_dilations[i]
encoder_blocks.append(
Bottleneck(
self.out_channels,
self.block_mid_channels,
dilation=dilation))
self.dilated_encoder_blocks = nn.Sequential(*encoder_blocks)
def init_weights(self):
caffe2_xavier_init(self.lateral_conv)
caffe2_xavier_init(self.fpn_conv)
for m in [self.lateral_norm, self.fpn_norm]:
constant_init(m, 1)
for m in self.dilated_encoder_blocks.modules():
if isinstance(m, nn.Conv2d):
normal_init(m, mean=0, std=0.01)
if is_norm(m):
constant_init(m, 1)
def forward(self, feature):
out = self.lateral_norm(self.lateral_conv(feature[-1]))
out = self.fpn_norm(self.fpn_conv(out))
return self.dilated_encoder_blocks(out),
| 3,868 | 34.495413 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/necks/fpg.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import torch.nn as nn
import torch.nn.functional as F
from mmcv.cnn import ConvModule
from mmcv.runner import BaseModule
from ..builder import NECKS
class Transition(BaseModule):
"""Base class for transition.
Args:
in_channels (int): Number of input channels.
out_channels (int): Number of output channels.
"""
def __init__(self, in_channels, out_channels, init_cfg=None):
super().__init__(init_cfg)
self.in_channels = in_channels
self.out_channels = out_channels
def forward(x):
pass
class UpInterpolationConv(Transition):
"""A transition used for up-sampling.
Up-sample the input by interpolation then refines the feature by
a convolution layer.
Args:
in_channels (int): Number of input channels.
out_channels (int): Number of output channels.
scale_factor (int): Up-sampling factor. Default: 2.
mode (int): Interpolation mode. Default: nearest.
align_corners (bool): Whether align corners when interpolation.
Default: None.
kernel_size (int): Kernel size for the conv. Default: 3.
"""
def __init__(self,
in_channels,
out_channels,
scale_factor=2,
mode='nearest',
align_corners=None,
kernel_size=3,
init_cfg=None,
**kwargs):
super().__init__(in_channels, out_channels, init_cfg)
self.mode = mode
self.scale_factor = scale_factor
self.align_corners = align_corners
self.conv = ConvModule(
in_channels,
out_channels,
kernel_size,
padding=(kernel_size - 1) // 2,
**kwargs)
def forward(self, x):
x = F.interpolate(
x,
scale_factor=self.scale_factor,
mode=self.mode,
align_corners=self.align_corners)
x = self.conv(x)
return x
class LastConv(Transition):
"""A transition used for refining the output of the last stage.
Args:
in_channels (int): Number of input channels.
out_channels (int): Number of output channels.
num_inputs (int): Number of inputs of the FPN features.
kernel_size (int): Kernel size for the conv. Default: 3.
"""
def __init__(self,
in_channels,
out_channels,
num_inputs,
kernel_size=3,
init_cfg=None,
**kwargs):
super().__init__(in_channels, out_channels, init_cfg)
self.num_inputs = num_inputs
self.conv_out = ConvModule(
in_channels,
out_channels,
kernel_size,
padding=(kernel_size - 1) // 2,
**kwargs)
def forward(self, inputs):
assert len(inputs) == self.num_inputs
return self.conv_out(inputs[-1])
@NECKS.register_module()
class FPG(BaseModule):
"""FPG.
Implementation of `Feature Pyramid Grids (FPG)
<https://arxiv.org/abs/2004.03580>`_.
This implementation only gives the basic structure stated in the paper.
But users can implement different type of transitions to fully explore the
the potential power of the structure of FPG.
Args:
in_channels (int): Number of input channels (feature maps of all levels
should have the same channels).
out_channels (int): Number of output channels (used at each scale)
num_outs (int): Number of output scales.
stack_times (int): The number of times the pyramid architecture will
be stacked.
paths (list[str]): Specify the path order of each stack level.
Each element in the list should be either 'bu' (bottom-up) or
'td' (top-down).
inter_channels (int): Number of inter channels.
same_up_trans (dict): Transition that goes down at the same stage.
same_down_trans (dict): Transition that goes up at the same stage.
across_lateral_trans (dict): Across-pathway same-stage
across_down_trans (dict): Across-pathway bottom-up connection.
across_up_trans (dict): Across-pathway top-down connection.
across_skip_trans (dict): Across-pathway skip connection.
output_trans (dict): Transition that trans the output of the
last stage.
start_level (int): Index of the start input backbone level used to
build the feature pyramid. Default: 0.
end_level (int): Index of the end input backbone level (exclusive) to
build the feature pyramid. Default: -1, which means the last level.
add_extra_convs (bool): It decides whether to add conv
layers on top of the original feature maps. Default to False.
If True, its actual mode is specified by `extra_convs_on_inputs`.
norm_cfg (dict): Config dict for normalization layer. Default: None.
init_cfg (dict or list[dict], optional): Initialization config dict.
"""
transition_types = {
'conv': ConvModule,
'interpolation_conv': UpInterpolationConv,
'last_conv': LastConv,
}
def __init__(self,
in_channels,
out_channels,
num_outs,
stack_times,
paths,
inter_channels=None,
same_down_trans=None,
same_up_trans=dict(
type='conv', kernel_size=3, stride=2, padding=1),
across_lateral_trans=dict(type='conv', kernel_size=1),
across_down_trans=dict(type='conv', kernel_size=3),
across_up_trans=None,
across_skip_trans=dict(type='identity'),
output_trans=dict(type='last_conv', kernel_size=3),
start_level=0,
end_level=-1,
add_extra_convs=False,
norm_cfg=None,
skip_inds=None,
init_cfg=[
dict(type='Caffe2Xavier', layer='Conv2d'),
dict(
type='Constant',
layer=[
'_BatchNorm', '_InstanceNorm', 'GroupNorm',
'LayerNorm'
],
val=1.0)
]):
super(FPG, self).__init__(init_cfg)
assert isinstance(in_channels, list)
self.in_channels = in_channels
self.out_channels = out_channels
self.num_ins = len(in_channels)
self.num_outs = num_outs
if inter_channels is None:
self.inter_channels = [out_channels for _ in range(num_outs)]
elif isinstance(inter_channels, int):
self.inter_channels = [inter_channels for _ in range(num_outs)]
else:
assert isinstance(inter_channels, list)
assert len(inter_channels) == num_outs
self.inter_channels = inter_channels
self.stack_times = stack_times
self.paths = paths
assert isinstance(paths, list) and len(paths) == stack_times
for d in paths:
assert d in ('bu', 'td')
self.same_down_trans = same_down_trans
self.same_up_trans = same_up_trans
self.across_lateral_trans = across_lateral_trans
self.across_down_trans = across_down_trans
self.across_up_trans = across_up_trans
self.output_trans = output_trans
self.across_skip_trans = across_skip_trans
self.with_bias = norm_cfg is None
# skip inds must be specified if across skip trans is not None
if self.across_skip_trans is not None:
skip_inds is not None
self.skip_inds = skip_inds
assert len(self.skip_inds[0]) <= self.stack_times
if end_level == -1:
self.backbone_end_level = self.num_ins
assert num_outs >= self.num_ins - start_level
else:
# if end_level < inputs, no extra level is allowed
self.backbone_end_level = end_level
assert end_level <= len(in_channels)
assert num_outs == end_level - start_level
self.start_level = start_level
self.end_level = end_level
self.add_extra_convs = add_extra_convs
# build lateral 1x1 convs to reduce channels
self.lateral_convs = nn.ModuleList()
for i in range(self.start_level, self.backbone_end_level):
l_conv = nn.Conv2d(self.in_channels[i],
self.inter_channels[i - self.start_level], 1)
self.lateral_convs.append(l_conv)
extra_levels = num_outs - self.backbone_end_level + self.start_level
self.extra_downsamples = nn.ModuleList()
for i in range(extra_levels):
if self.add_extra_convs:
fpn_idx = self.backbone_end_level - self.start_level + i
extra_conv = nn.Conv2d(
self.inter_channels[fpn_idx - 1],
self.inter_channels[fpn_idx],
3,
stride=2,
padding=1)
self.extra_downsamples.append(extra_conv)
else:
self.extra_downsamples.append(nn.MaxPool2d(1, stride=2))
self.fpn_transitions = nn.ModuleList() # stack times
for s in range(self.stack_times):
stage_trans = nn.ModuleList() # num of feature levels
for i in range(self.num_outs):
# same, across_lateral, across_down, across_up
trans = nn.ModuleDict()
if s in self.skip_inds[i]:
stage_trans.append(trans)
continue
# build same-stage down trans (used in bottom-up paths)
if i == 0 or self.same_up_trans is None:
same_up_trans = None
else:
same_up_trans = self.build_trans(
self.same_up_trans, self.inter_channels[i - 1],
self.inter_channels[i])
trans['same_up'] = same_up_trans
# build same-stage up trans (used in top-down paths)
if i == self.num_outs - 1 or self.same_down_trans is None:
same_down_trans = None
else:
same_down_trans = self.build_trans(
self.same_down_trans, self.inter_channels[i + 1],
self.inter_channels[i])
trans['same_down'] = same_down_trans
# build across lateral trans
across_lateral_trans = self.build_trans(
self.across_lateral_trans, self.inter_channels[i],
self.inter_channels[i])
trans['across_lateral'] = across_lateral_trans
# build across down trans
if i == self.num_outs - 1 or self.across_down_trans is None:
across_down_trans = None
else:
across_down_trans = self.build_trans(
self.across_down_trans, self.inter_channels[i + 1],
self.inter_channels[i])
trans['across_down'] = across_down_trans
# build across up trans
if i == 0 or self.across_up_trans is None:
across_up_trans = None
else:
across_up_trans = self.build_trans(
self.across_up_trans, self.inter_channels[i - 1],
self.inter_channels[i])
trans['across_up'] = across_up_trans
if self.across_skip_trans is None:
across_skip_trans = None
else:
across_skip_trans = self.build_trans(
self.across_skip_trans, self.inter_channels[i - 1],
self.inter_channels[i])
trans['across_skip'] = across_skip_trans
# build across_skip trans
stage_trans.append(trans)
self.fpn_transitions.append(stage_trans)
self.output_transition = nn.ModuleList() # output levels
for i in range(self.num_outs):
trans = self.build_trans(
self.output_trans,
self.inter_channels[i],
self.out_channels,
num_inputs=self.stack_times + 1)
self.output_transition.append(trans)
self.relu = nn.ReLU(inplace=True)
def build_trans(self, cfg, in_channels, out_channels, **extra_args):
cfg_ = cfg.copy()
trans_type = cfg_.pop('type')
trans_cls = self.transition_types[trans_type]
return trans_cls(in_channels, out_channels, **cfg_, **extra_args)
def fuse(self, fuse_dict):
out = None
for item in fuse_dict.values():
if item is not None:
if out is None:
out = item
else:
out = out + item
return out
def forward(self, inputs):
assert len(inputs) == len(self.in_channels)
# build all levels from original feature maps
feats = [
lateral_conv(inputs[i + self.start_level])
for i, lateral_conv in enumerate(self.lateral_convs)
]
for downsample in self.extra_downsamples:
feats.append(downsample(feats[-1]))
outs = [feats]
for i in range(self.stack_times):
current_outs = outs[-1]
next_outs = []
direction = self.paths[i]
for j in range(self.num_outs):
if i in self.skip_inds[j]:
next_outs.append(outs[-1][j])
continue
# feature level
if direction == 'td':
lvl = self.num_outs - j - 1
else:
lvl = j
# get transitions
if direction == 'td':
same_trans = self.fpn_transitions[i][lvl]['same_down']
else:
same_trans = self.fpn_transitions[i][lvl]['same_up']
across_lateral_trans = self.fpn_transitions[i][lvl][
'across_lateral']
across_down_trans = self.fpn_transitions[i][lvl]['across_down']
across_up_trans = self.fpn_transitions[i][lvl]['across_up']
across_skip_trans = self.fpn_transitions[i][lvl]['across_skip']
# init output
to_fuse = dict(
same=None, lateral=None, across_up=None, across_down=None)
# same downsample/upsample
if same_trans is not None:
to_fuse['same'] = same_trans(next_outs[-1])
# across lateral
if across_lateral_trans is not None:
to_fuse['lateral'] = across_lateral_trans(
current_outs[lvl])
# across downsample
if lvl > 0 and across_up_trans is not None:
to_fuse['across_up'] = across_up_trans(current_outs[lvl -
1])
# across upsample
if (lvl < self.num_outs - 1 and across_down_trans is not None):
to_fuse['across_down'] = across_down_trans(
current_outs[lvl + 1])
if across_skip_trans is not None:
to_fuse['across_skip'] = across_skip_trans(outs[0][lvl])
x = self.fuse(to_fuse)
next_outs.append(x)
if direction == 'td':
outs.append(next_outs[::-1])
else:
outs.append(next_outs)
# output trans
final_outs = []
for i in range(self.num_outs):
lvl_out_list = []
for s in range(len(outs)):
lvl_out_list.append(outs[s][i])
lvl_out = self.output_transition[i](lvl_out_list)
final_outs.append(lvl_out)
return final_outs
| 16,338 | 39.144963 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/necks/pafpn.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import torch.nn as nn
import torch.nn.functional as F
from mmcv.cnn import ConvModule
from mmcv.runner import auto_fp16
from ..builder import NECKS
from .fpn import FPN
@NECKS.register_module()
class PAFPN(FPN):
"""Path Aggregation Network for Instance Segmentation.
This is an implementation of the `PAFPN in Path Aggregation Network
<https://arxiv.org/abs/1803.01534>`_.
Args:
in_channels (List[int]): Number of input channels per scale.
out_channels (int): Number of output channels (used at each scale)
num_outs (int): Number of output scales.
start_level (int): Index of the start input backbone level used to
build the feature pyramid. Default: 0.
end_level (int): Index of the end input backbone level (exclusive) to
build the feature pyramid. Default: -1, which means the last level.
add_extra_convs (bool | str): If bool, it decides whether to add conv
layers on top of the original feature maps. Default to False.
If True, it is equivalent to `add_extra_convs='on_input'`.
If str, it specifies the source feature map of the extra convs.
Only the following options are allowed
- 'on_input': Last feat map of neck inputs (i.e. backbone feature).
- 'on_lateral': Last feature map after lateral convs.
- 'on_output': The last output feature map after fpn convs.
relu_before_extra_convs (bool): Whether to apply relu before the extra
conv. Default: False.
no_norm_on_lateral (bool): Whether to apply norm on lateral.
Default: False.
conv_cfg (dict): Config dict for convolution layer. Default: None.
norm_cfg (dict): Config dict for normalization layer. Default: None.
act_cfg (str): Config dict for activation layer in ConvModule.
Default: None.
init_cfg (dict or list[dict], optional): Initialization config dict.
"""
def __init__(self,
in_channels,
out_channels,
num_outs,
start_level=0,
end_level=-1,
add_extra_convs=False,
relu_before_extra_convs=False,
no_norm_on_lateral=False,
conv_cfg=None,
norm_cfg=None,
act_cfg=None,
init_cfg=dict(
type='Xavier', layer='Conv2d', distribution='uniform')):
super(PAFPN, self).__init__(
in_channels,
out_channels,
num_outs,
start_level,
end_level,
add_extra_convs,
relu_before_extra_convs,
no_norm_on_lateral,
conv_cfg,
norm_cfg,
act_cfg,
init_cfg=init_cfg)
# add extra bottom up pathway
self.downsample_convs = nn.ModuleList()
self.pafpn_convs = nn.ModuleList()
for i in range(self.start_level + 1, self.backbone_end_level):
d_conv = ConvModule(
out_channels,
out_channels,
3,
stride=2,
padding=1,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg,
act_cfg=act_cfg,
inplace=False)
pafpn_conv = ConvModule(
out_channels,
out_channels,
3,
padding=1,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg,
act_cfg=act_cfg,
inplace=False)
self.downsample_convs.append(d_conv)
self.pafpn_convs.append(pafpn_conv)
@auto_fp16()
def forward(self, inputs):
"""Forward function."""
assert len(inputs) == len(self.in_channels)
# build laterals
laterals = [
lateral_conv(inputs[i + self.start_level])
for i, lateral_conv in enumerate(self.lateral_convs)
]
# build top-down path
used_backbone_levels = len(laterals)
for i in range(used_backbone_levels - 1, 0, -1):
prev_shape = laterals[i - 1].shape[2:]
laterals[i - 1] += F.interpolate(
laterals[i], size=prev_shape, mode='nearest')
# build outputs
# part 1: from original levels
inter_outs = [
self.fpn_convs[i](laterals[i]) for i in range(used_backbone_levels)
]
# part 2: add bottom-up path
for i in range(0, used_backbone_levels - 1):
inter_outs[i + 1] += self.downsample_convs[i](inter_outs[i])
outs = []
outs.append(inter_outs[0])
outs.extend([
self.pafpn_convs[i - 1](inter_outs[i])
for i in range(1, used_backbone_levels)
])
# part 3: add extra levels
if self.num_outs > len(outs):
# use max pool to get more levels on top of outputs
# (e.g., Faster R-CNN, Mask R-CNN)
if not self.add_extra_convs:
for i in range(self.num_outs - used_backbone_levels):
outs.append(F.max_pool2d(outs[-1], 1, stride=2))
# add conv layers on top of original feature maps (RetinaNet)
else:
if self.add_extra_convs == 'on_input':
orig = inputs[self.backbone_end_level - 1]
outs.append(self.fpn_convs[used_backbone_levels](orig))
elif self.add_extra_convs == 'on_lateral':
outs.append(self.fpn_convs[used_backbone_levels](
laterals[-1]))
elif self.add_extra_convs == 'on_output':
outs.append(self.fpn_convs[used_backbone_levels](outs[-1]))
else:
raise NotImplementedError
for i in range(used_backbone_levels + 1, self.num_outs):
if self.relu_before_extra_convs:
outs.append(self.fpn_convs[i](F.relu(outs[-1])))
else:
outs.append(self.fpn_convs[i](outs[-1]))
return tuple(outs)
| 6,251 | 38.320755 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/necks/nasfcos_fpn.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import torch.nn as nn
import torch.nn.functional as F
from mmcv.cnn import ConvModule, caffe2_xavier_init
from mmcv.ops.merge_cells import ConcatCell
from mmcv.runner import BaseModule
from ..builder import NECKS
@NECKS.register_module()
class NASFCOS_FPN(BaseModule):
"""FPN structure in NASFPN.
Implementation of paper `NAS-FCOS: Fast Neural Architecture Search for
Object Detection <https://arxiv.org/abs/1906.04423>`_
Args:
in_channels (List[int]): Number of input channels per scale.
out_channels (int): Number of output channels (used at each scale)
num_outs (int): Number of output scales.
start_level (int): Index of the start input backbone level used to
build the feature pyramid. Default: 0.
end_level (int): Index of the end input backbone level (exclusive) to
build the feature pyramid. Default: -1, which means the last level.
add_extra_convs (bool): It decides whether to add conv
layers on top of the original feature maps. Default to False.
If True, its actual mode is specified by `extra_convs_on_inputs`.
conv_cfg (dict): dictionary to construct and config conv layer.
norm_cfg (dict): dictionary to construct and config norm layer.
init_cfg (dict or list[dict], optional): Initialization config dict.
Default: None
"""
def __init__(self,
in_channels,
out_channels,
num_outs,
start_level=1,
end_level=-1,
add_extra_convs=False,
conv_cfg=None,
norm_cfg=None,
init_cfg=None):
assert init_cfg is None, 'To prevent abnormal initialization ' \
'behavior, init_cfg is not allowed to be set'
super(NASFCOS_FPN, self).__init__(init_cfg)
assert isinstance(in_channels, list)
self.in_channels = in_channels
self.out_channels = out_channels
self.num_ins = len(in_channels)
self.num_outs = num_outs
self.norm_cfg = norm_cfg
self.conv_cfg = conv_cfg
if end_level == -1:
self.backbone_end_level = self.num_ins
assert num_outs >= self.num_ins - start_level
else:
self.backbone_end_level = end_level
assert end_level <= len(in_channels)
assert num_outs == end_level - start_level
self.start_level = start_level
self.end_level = end_level
self.add_extra_convs = add_extra_convs
self.adapt_convs = nn.ModuleList()
for i in range(self.start_level, self.backbone_end_level):
adapt_conv = ConvModule(
in_channels[i],
out_channels,
1,
stride=1,
padding=0,
bias=False,
norm_cfg=dict(type='BN'),
act_cfg=dict(type='ReLU', inplace=False))
self.adapt_convs.append(adapt_conv)
# C2 is omitted according to the paper
extra_levels = num_outs - self.backbone_end_level + self.start_level
def build_concat_cell(with_input1_conv, with_input2_conv):
cell_conv_cfg = dict(
kernel_size=1, padding=0, bias=False, groups=out_channels)
return ConcatCell(
in_channels=out_channels,
out_channels=out_channels,
with_out_conv=True,
out_conv_cfg=cell_conv_cfg,
out_norm_cfg=dict(type='BN'),
out_conv_order=('norm', 'act', 'conv'),
with_input1_conv=with_input1_conv,
with_input2_conv=with_input2_conv,
input_conv_cfg=conv_cfg,
input_norm_cfg=norm_cfg,
upsample_mode='nearest')
# Denote c3=f0, c4=f1, c5=f2 for convince
self.fpn = nn.ModuleDict()
self.fpn['c22_1'] = build_concat_cell(True, True)
self.fpn['c22_2'] = build_concat_cell(True, True)
self.fpn['c32'] = build_concat_cell(True, False)
self.fpn['c02'] = build_concat_cell(True, False)
self.fpn['c42'] = build_concat_cell(True, True)
self.fpn['c36'] = build_concat_cell(True, True)
self.fpn['c61'] = build_concat_cell(True, True) # f9
self.extra_downsamples = nn.ModuleList()
for i in range(extra_levels):
extra_act_cfg = None if i == 0 \
else dict(type='ReLU', inplace=False)
self.extra_downsamples.append(
ConvModule(
out_channels,
out_channels,
3,
stride=2,
padding=1,
act_cfg=extra_act_cfg,
order=('act', 'norm', 'conv')))
def forward(self, inputs):
"""Forward function."""
feats = [
adapt_conv(inputs[i + self.start_level])
for i, adapt_conv in enumerate(self.adapt_convs)
]
for (i, module_name) in enumerate(self.fpn):
idx_1, idx_2 = int(module_name[1]), int(module_name[2])
res = self.fpn[module_name](feats[idx_1], feats[idx_2])
feats.append(res)
ret = []
for (idx, input_idx) in zip([9, 8, 7], [1, 2, 3]): # add P3, P4, P5
feats1, feats2 = feats[idx], feats[5]
feats2_resize = F.interpolate(
feats2,
size=feats1.size()[2:],
mode='bilinear',
align_corners=False)
feats_sum = feats1 + feats2_resize
ret.append(
F.interpolate(
feats_sum,
size=inputs[input_idx].size()[2:],
mode='bilinear',
align_corners=False))
for submodule in self.extra_downsamples:
ret.append(submodule(ret[-1]))
return tuple(ret)
def init_weights(self):
"""Initialize the weights of module."""
super(NASFCOS_FPN, self).init_weights()
for module in self.fpn.values():
if hasattr(module, 'conv_out'):
caffe2_xavier_init(module.out_conv.conv)
for modules in [
self.adapt_convs.modules(),
self.extra_downsamples.modules()
]:
for module in modules:
if isinstance(module, nn.Conv2d):
caffe2_xavier_init(module)
| 6,591 | 37.776471 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/necks/fpn_carafe.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import torch.nn as nn
from mmcv.cnn import ConvModule, build_upsample_layer, xavier_init
from mmcv.ops.carafe import CARAFEPack
from mmcv.runner import BaseModule, ModuleList
from ..builder import NECKS
@NECKS.register_module()
class FPN_CARAFE(BaseModule):
"""FPN_CARAFE is a more flexible implementation of FPN. It allows more
choice for upsample methods during the top-down pathway.
It can reproduce the performance of ICCV 2019 paper
CARAFE: Content-Aware ReAssembly of FEatures
Please refer to https://arxiv.org/abs/1905.02188 for more details.
Args:
in_channels (list[int]): Number of channels for each input feature map.
out_channels (int): Output channels of feature pyramids.
num_outs (int): Number of output stages.
start_level (int): Start level of feature pyramids.
(Default: 0)
end_level (int): End level of feature pyramids.
(Default: -1 indicates the last level).
norm_cfg (dict): Dictionary to construct and config norm layer.
activate (str): Type of activation function in ConvModule
(Default: None indicates w/o activation).
order (dict): Order of components in ConvModule.
upsample (str): Type of upsample layer.
upsample_cfg (dict): Dictionary to construct and config upsample layer.
init_cfg (dict or list[dict], optional): Initialization config dict.
Default: None
"""
def __init__(self,
in_channels,
out_channels,
num_outs,
start_level=0,
end_level=-1,
norm_cfg=None,
act_cfg=None,
order=('conv', 'norm', 'act'),
upsample_cfg=dict(
type='carafe',
up_kernel=5,
up_group=1,
encoder_kernel=3,
encoder_dilation=1),
init_cfg=None):
assert init_cfg is None, 'To prevent abnormal initialization ' \
'behavior, init_cfg is not allowed to be set'
super(FPN_CARAFE, self).__init__(init_cfg)
assert isinstance(in_channels, list)
self.in_channels = in_channels
self.out_channels = out_channels
self.num_ins = len(in_channels)
self.num_outs = num_outs
self.norm_cfg = norm_cfg
self.act_cfg = act_cfg
self.with_bias = norm_cfg is None
self.upsample_cfg = upsample_cfg.copy()
self.upsample = self.upsample_cfg.get('type')
self.relu = nn.ReLU(inplace=False)
self.order = order
assert order in [('conv', 'norm', 'act'), ('act', 'conv', 'norm')]
assert self.upsample in [
'nearest', 'bilinear', 'deconv', 'pixel_shuffle', 'carafe', None
]
if self.upsample in ['deconv', 'pixel_shuffle']:
assert hasattr(
self.upsample_cfg,
'upsample_kernel') and self.upsample_cfg.upsample_kernel > 0
self.upsample_kernel = self.upsample_cfg.pop('upsample_kernel')
if end_level == -1:
self.backbone_end_level = self.num_ins
assert num_outs >= self.num_ins - start_level
else:
# if end_level < inputs, no extra level is allowed
self.backbone_end_level = end_level
assert end_level <= len(in_channels)
assert num_outs == end_level - start_level
self.start_level = start_level
self.end_level = end_level
self.lateral_convs = ModuleList()
self.fpn_convs = ModuleList()
self.upsample_modules = ModuleList()
for i in range(self.start_level, self.backbone_end_level):
l_conv = ConvModule(
in_channels[i],
out_channels,
1,
norm_cfg=norm_cfg,
bias=self.with_bias,
act_cfg=act_cfg,
inplace=False,
order=self.order)
fpn_conv = ConvModule(
out_channels,
out_channels,
3,
padding=1,
norm_cfg=self.norm_cfg,
bias=self.with_bias,
act_cfg=act_cfg,
inplace=False,
order=self.order)
if i != self.backbone_end_level - 1:
upsample_cfg_ = self.upsample_cfg.copy()
if self.upsample == 'deconv':
upsample_cfg_.update(
in_channels=out_channels,
out_channels=out_channels,
kernel_size=self.upsample_kernel,
stride=2,
padding=(self.upsample_kernel - 1) // 2,
output_padding=(self.upsample_kernel - 1) // 2)
elif self.upsample == 'pixel_shuffle':
upsample_cfg_.update(
in_channels=out_channels,
out_channels=out_channels,
scale_factor=2,
upsample_kernel=self.upsample_kernel)
elif self.upsample == 'carafe':
upsample_cfg_.update(channels=out_channels, scale_factor=2)
else:
# suppress warnings
align_corners = (None
if self.upsample == 'nearest' else False)
upsample_cfg_.update(
scale_factor=2,
mode=self.upsample,
align_corners=align_corners)
upsample_module = build_upsample_layer(upsample_cfg_)
self.upsample_modules.append(upsample_module)
self.lateral_convs.append(l_conv)
self.fpn_convs.append(fpn_conv)
# add extra conv layers (e.g., RetinaNet)
extra_out_levels = (
num_outs - self.backbone_end_level + self.start_level)
if extra_out_levels >= 1:
for i in range(extra_out_levels):
in_channels = (
self.in_channels[self.backbone_end_level -
1] if i == 0 else out_channels)
extra_l_conv = ConvModule(
in_channels,
out_channels,
3,
stride=2,
padding=1,
norm_cfg=norm_cfg,
bias=self.with_bias,
act_cfg=act_cfg,
inplace=False,
order=self.order)
if self.upsample == 'deconv':
upsampler_cfg_ = dict(
in_channels=out_channels,
out_channels=out_channels,
kernel_size=self.upsample_kernel,
stride=2,
padding=(self.upsample_kernel - 1) // 2,
output_padding=(self.upsample_kernel - 1) // 2)
elif self.upsample == 'pixel_shuffle':
upsampler_cfg_ = dict(
in_channels=out_channels,
out_channels=out_channels,
scale_factor=2,
upsample_kernel=self.upsample_kernel)
elif self.upsample == 'carafe':
upsampler_cfg_ = dict(
channels=out_channels,
scale_factor=2,
**self.upsample_cfg)
else:
# suppress warnings
align_corners = (None
if self.upsample == 'nearest' else False)
upsampler_cfg_ = dict(
scale_factor=2,
mode=self.upsample,
align_corners=align_corners)
upsampler_cfg_['type'] = self.upsample
upsample_module = build_upsample_layer(upsampler_cfg_)
extra_fpn_conv = ConvModule(
out_channels,
out_channels,
3,
padding=1,
norm_cfg=self.norm_cfg,
bias=self.with_bias,
act_cfg=act_cfg,
inplace=False,
order=self.order)
self.upsample_modules.append(upsample_module)
self.fpn_convs.append(extra_fpn_conv)
self.lateral_convs.append(extra_l_conv)
# default init_weights for conv(msra) and norm in ConvModule
def init_weights(self):
"""Initialize the weights of module."""
super(FPN_CARAFE, self).init_weights()
for m in self.modules():
if isinstance(m, (nn.Conv2d, nn.ConvTranspose2d)):
xavier_init(m, distribution='uniform')
for m in self.modules():
if isinstance(m, CARAFEPack):
m.init_weights()
def slice_as(self, src, dst):
"""Slice ``src`` as ``dst``
Note:
``src`` should have the same or larger size than ``dst``.
Args:
src (torch.Tensor): Tensors to be sliced.
dst (torch.Tensor): ``src`` will be sliced to have the same
size as ``dst``.
Returns:
torch.Tensor: Sliced tensor.
"""
assert (src.size(2) >= dst.size(2)) and (src.size(3) >= dst.size(3))
if src.size(2) == dst.size(2) and src.size(3) == dst.size(3):
return src
else:
return src[:, :, :dst.size(2), :dst.size(3)]
def tensor_add(self, a, b):
"""Add tensors ``a`` and ``b`` that might have different sizes."""
if a.size() == b.size():
c = a + b
else:
c = a + self.slice_as(b, a)
return c
def forward(self, inputs):
"""Forward function."""
assert len(inputs) == len(self.in_channels)
# build laterals
laterals = []
for i, lateral_conv in enumerate(self.lateral_convs):
if i <= self.backbone_end_level - self.start_level:
input = inputs[min(i + self.start_level, len(inputs) - 1)]
else:
input = laterals[-1]
lateral = lateral_conv(input)
laterals.append(lateral)
# build top-down path
for i in range(len(laterals) - 1, 0, -1):
if self.upsample is not None:
upsample_feat = self.upsample_modules[i - 1](laterals[i])
else:
upsample_feat = laterals[i]
laterals[i - 1] = self.tensor_add(laterals[i - 1], upsample_feat)
# build outputs
num_conv_outs = len(self.fpn_convs)
outs = []
for i in range(num_conv_outs):
out = self.fpn_convs[i](laterals[i])
outs.append(out)
return tuple(outs)
| 11,100 | 39.221014 | 79 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/necks/ct_resnet_neck.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import math
import torch.nn as nn
from mmcv.cnn import ConvModule
from mmcv.runner import BaseModule, auto_fp16
from mmdet.models.builder import NECKS
@NECKS.register_module()
class CTResNetNeck(BaseModule):
"""The neck used in `CenterNet <https://arxiv.org/abs/1904.07850>`_ for
object classification and box regression.
Args:
in_channel (int): Number of input channels.
num_deconv_filters (tuple[int]): Number of filters per stage.
num_deconv_kernels (tuple[int]): Number of kernels per stage.
use_dcn (bool): If True, use DCNv2. Default: True.
init_cfg (dict or list[dict], optional): Initialization config dict.
"""
def __init__(self,
in_channel,
num_deconv_filters,
num_deconv_kernels,
use_dcn=True,
init_cfg=None):
super(CTResNetNeck, self).__init__(init_cfg)
assert len(num_deconv_filters) == len(num_deconv_kernels)
self.fp16_enabled = False
self.use_dcn = use_dcn
self.in_channel = in_channel
self.deconv_layers = self._make_deconv_layer(num_deconv_filters,
num_deconv_kernels)
def _make_deconv_layer(self, num_deconv_filters, num_deconv_kernels):
"""use deconv layers to upsample backbone's output."""
layers = []
for i in range(len(num_deconv_filters)):
feat_channel = num_deconv_filters[i]
conv_module = ConvModule(
self.in_channel,
feat_channel,
3,
padding=1,
conv_cfg=dict(type='DCNv2') if self.use_dcn else None,
norm_cfg=dict(type='BN'))
layers.append(conv_module)
upsample_module = ConvModule(
feat_channel,
feat_channel,
num_deconv_kernels[i],
stride=2,
padding=1,
conv_cfg=dict(type='deconv'),
norm_cfg=dict(type='BN'))
layers.append(upsample_module)
self.in_channel = feat_channel
return nn.Sequential(*layers)
def init_weights(self):
for m in self.modules():
if isinstance(m, nn.ConvTranspose2d):
# In order to be consistent with the source code,
# reset the ConvTranspose2d initialization parameters
m.reset_parameters()
# Simulated bilinear upsampling kernel
w = m.weight.data
f = math.ceil(w.size(2) / 2)
c = (2 * f - 1 - f % 2) / (2. * f)
for i in range(w.size(2)):
for j in range(w.size(3)):
w[0, 0, i, j] = \
(1 - math.fabs(i / f - c)) * (
1 - math.fabs(j / f - c))
for c in range(1, w.size(0)):
w[c, 0, :, :] = w[0, 0, :, :]
elif isinstance(m, nn.BatchNorm2d):
nn.init.constant_(m.weight, 1)
nn.init.constant_(m.bias, 0)
# self.use_dcn is False
elif not self.use_dcn and isinstance(m, nn.Conv2d):
# In order to be consistent with the source code,
# reset the Conv2d initialization parameters
m.reset_parameters()
@auto_fp16()
def forward(self, inputs):
assert isinstance(inputs, (list, tuple))
outs = self.deconv_layers(inputs[-1])
return outs,
| 3,642 | 37.347368 | 77 |
py
|
DSLA-DSLA
|
DSLA-DSLA/mmdet/models/necks/fpn.py
|
# Copyright (c) OpenMMLab. All rights reserved.
import torch.nn as nn
import torch.nn.functional as F
from mmcv.cnn import ConvModule
from mmcv.runner import BaseModule, auto_fp16
from ..builder import NECKS
@NECKS.register_module()
class FPN(BaseModule):
r"""Feature Pyramid Network.
This is an implementation of paper `Feature Pyramid Networks for Object
Detection <https://arxiv.org/abs/1612.03144>`_.
Args:
in_channels (List[int]): Number of input channels per scale.
out_channels (int): Number of output channels (used at each scale)
num_outs (int): Number of output scales.
start_level (int): Index of the start input backbone level used to
build the feature pyramid. Default: 0.
end_level (int): Index of the end input backbone level (exclusive) to
build the feature pyramid. Default: -1, which means the last level.
add_extra_convs (bool | str): If bool, it decides whether to add conv
layers on top of the original feature maps. Default to False.
If True, it is equivalent to `add_extra_convs='on_input'`.
If str, it specifies the source feature map of the extra convs.
Only the following options are allowed
- 'on_input': Last feat map of neck inputs (i.e. backbone feature).
- 'on_lateral': Last feature map after lateral convs.
- 'on_output': The last output feature map after fpn convs.
relu_before_extra_convs (bool): Whether to apply relu before the extra
conv. Default: False.
no_norm_on_lateral (bool): Whether to apply norm on lateral.
Default: False.
conv_cfg (dict): Config dict for convolution layer. Default: None.
norm_cfg (dict): Config dict for normalization layer. Default: None.
act_cfg (str): Config dict for activation layer in ConvModule.
Default: None.
upsample_cfg (dict): Config dict for interpolate layer.
Default: `dict(mode='nearest')`
init_cfg (dict or list[dict], optional): Initialization config dict.
Example:
>>> import torch
>>> in_channels = [2, 3, 5, 7]
>>> scales = [340, 170, 84, 43]
>>> inputs = [torch.rand(1, c, s, s)
... for c, s in zip(in_channels, scales)]
>>> self = FPN(in_channels, 11, len(in_channels)).eval()
>>> outputs = self.forward(inputs)
>>> for i in range(len(outputs)):
... print(f'outputs[{i}].shape = {outputs[i].shape}')
outputs[0].shape = torch.Size([1, 11, 340, 340])
outputs[1].shape = torch.Size([1, 11, 170, 170])
outputs[2].shape = torch.Size([1, 11, 84, 84])
outputs[3].shape = torch.Size([1, 11, 43, 43])
"""
def __init__(self,
in_channels,
out_channels,
num_outs,
start_level=0,
end_level=-1,
add_extra_convs=False,
relu_before_extra_convs=False,
no_norm_on_lateral=False,
conv_cfg=None,
norm_cfg=None,
act_cfg=None,
upsample_cfg=dict(mode='nearest'),
init_cfg=dict(
type='Xavier', layer='Conv2d', distribution='uniform')):
super(FPN, self).__init__(init_cfg)
assert isinstance(in_channels, list)
self.in_channels = in_channels
self.out_channels = out_channels
self.num_ins = len(in_channels)
self.num_outs = num_outs
self.relu_before_extra_convs = relu_before_extra_convs
self.no_norm_on_lateral = no_norm_on_lateral
self.fp16_enabled = False
self.upsample_cfg = upsample_cfg.copy()
if end_level == -1:
self.backbone_end_level = self.num_ins
assert num_outs >= self.num_ins - start_level
else:
# if end_level < inputs, no extra level is allowed
self.backbone_end_level = end_level
assert end_level <= len(in_channels)
assert num_outs == end_level - start_level
self.start_level = start_level
self.end_level = end_level
self.add_extra_convs = add_extra_convs
assert isinstance(add_extra_convs, (str, bool))
if isinstance(add_extra_convs, str):
# Extra_convs_source choices: 'on_input', 'on_lateral', 'on_output'
assert add_extra_convs in ('on_input', 'on_lateral', 'on_output')
elif add_extra_convs: # True
self.add_extra_convs = 'on_input'
self.lateral_convs = nn.ModuleList()
self.fpn_convs = nn.ModuleList()
for i in range(self.start_level, self.backbone_end_level):
l_conv = ConvModule(
in_channels[i],
out_channels,
1,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg if not self.no_norm_on_lateral else None,
act_cfg=act_cfg,
inplace=False)
fpn_conv = ConvModule(
out_channels,
out_channels,
3,
padding=1,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg,
act_cfg=act_cfg,
inplace=False)
self.lateral_convs.append(l_conv)
self.fpn_convs.append(fpn_conv)
# add extra conv layers (e.g., RetinaNet)
extra_levels = num_outs - self.backbone_end_level + self.start_level
if self.add_extra_convs and extra_levels >= 1:
for i in range(extra_levels):
if i == 0 and self.add_extra_convs == 'on_input':
in_channels = self.in_channels[self.backbone_end_level - 1]
else:
in_channels = out_channels
extra_fpn_conv = ConvModule(
in_channels,
out_channels,
3,
stride=2,
padding=1,
conv_cfg=conv_cfg,
norm_cfg=norm_cfg,
act_cfg=act_cfg,
inplace=False)
self.fpn_convs.append(extra_fpn_conv)
@auto_fp16()
def forward(self, inputs):
"""Forward function."""
assert len(inputs) == len(self.in_channels)
# build laterals
laterals = [
lateral_conv(inputs[i + self.start_level])
for i, lateral_conv in enumerate(self.lateral_convs)
]
# build top-down path
used_backbone_levels = len(laterals)
for i in range(used_backbone_levels - 1, 0, -1):
# In some cases, fixing `scale factor` (e.g. 2) is preferred, but
# it cannot co-exist with `size` in `F.interpolate`.
if 'scale_factor' in self.upsample_cfg:
laterals[i - 1] += F.interpolate(laterals[i],
**self.upsample_cfg)
else:
prev_shape = laterals[i - 1].shape[2:]
laterals[i - 1] += F.interpolate(
laterals[i], size=prev_shape, **self.upsample_cfg)
# build outputs
# part 1: from original levels
outs = [
self.fpn_convs[i](laterals[i]) for i in range(used_backbone_levels)
]
# part 2: add extra levels
if self.num_outs > len(outs):
# use max pool to get more levels on top of outputs
# (e.g., Faster R-CNN, Mask R-CNN)
if not self.add_extra_convs:
for i in range(self.num_outs - used_backbone_levels):
outs.append(F.max_pool2d(outs[-1], 1, stride=2))
# add conv layers on top of original feature maps (RetinaNet)
else:
if self.add_extra_convs == 'on_input':
extra_source = inputs[self.backbone_end_level - 1]
elif self.add_extra_convs == 'on_lateral':
extra_source = laterals[-1]
elif self.add_extra_convs == 'on_output':
extra_source = outs[-1]
else:
raise NotImplementedError
outs.append(self.fpn_convs[used_backbone_levels](extra_source))
for i in range(used_backbone_levels + 1, self.num_outs):
if self.relu_before_extra_convs:
outs.append(self.fpn_convs[i](F.relu(outs[-1])))
else:
outs.append(self.fpn_convs[i](outs[-1]))
return tuple(outs)
| 8,671 | 41.509804 | 79 |
py
|
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