Create new file

model_video.py

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+import torch
+from torch import nn
+from torch.nn import init
+import torch.nn.functional as F
+from torch.optim import Adam
+import numpy
+from einops import rearrange
+import time
+from transformer import Transformer
+from Intra_MLP import index_points,knn_l2
+
+# vgg choice
+base = {'vgg': [64, 64, 'M', 128, 128, 'M', 256, 256, 256, 'M', 512, 512, 512, 'M', 512, 512, 512, 'M']}
+
+# vgg16
+def vgg(cfg, i=3, batch_norm=True):
+    layers = []
+    in_channels = i
+    for v in cfg:
+        if v == 'M':
+            layers += [nn.MaxPool2d(kernel_size=2, stride=2)]
+        else:
+            conv2d = nn.Conv2d(in_channels, v, kernel_size=3, padding=1)
+            if batch_norm:
+                layers += [conv2d, nn.BatchNorm2d(v), nn.ReLU(inplace=True)]
+            else:
+                layers += [conv2d, nn.ReLU(inplace=True)]
+            in_channels = v
+    return layers
+
+
+def hsp(in_channel, out_channel):
+    layers = nn.Sequential(nn.Conv2d(in_channel, out_channel, 1, 1),
+                           nn.ReLU())
+    return layers
+
+def cls_modulation_branch(in_channel, hiden_channel):
+    layers = nn.Sequential(nn.Linear(in_channel, hiden_channel),
+                           nn.ReLU())
+    return layers
+
+def cls_branch(hiden_channel, class_num):
+    layers = nn.Sequential(nn.Linear(hiden_channel, class_num),
+                           nn.Sigmoid())
+    return layers
+
+def intra():
+    layers = []
+    layers += [nn.Conv2d(512, 512, 1, 1)]
+    layers += [nn.Sigmoid()]
+    return layers
+
+def concat_r():
+    layers = []
+    layers += [nn.Conv2d(512, 512, 1, 1)]
+    layers += [nn.ReLU()]
+    layers += [nn.Conv2d(512, 512, 3, 1, 1)]
+    layers += [nn.ReLU()]
+    layers += [nn.ConvTranspose2d(512, 512, 4, 2, 1)]
+    return layers
+
+def concat_1():
+    layers = []
+    layers += [nn.Conv2d(512, 512, 1, 1)]
+    layers += [nn.ReLU()]
+    layers += [nn.Conv2d(512, 512, 3, 1, 1)]
+    layers += [nn.ReLU()]
+    return layers
+
+def mask_branch():
+    layers = []
+    layers += [nn.Conv2d(512, 2, 3, 1, 1)]
+    layers += [nn.ConvTranspose2d(2, 2, 8, 4, 2)]
+    layers += [nn.Softmax2d()]
+    return layers
+
+def incr_channel():
+    layers = []
+    layers += [nn.Conv2d(128, 512, 3, 1, 1)]
+    layers += [nn.Conv2d(256, 512, 3, 1, 1)]
+    layers += [nn.Conv2d(512, 512, 3, 1, 1)]
+    layers += [nn.Conv2d(512, 512, 3, 1, 1)]
+    return layers
+
+def incr_channel2():
+    layers = []
+    layers += [nn.Conv2d(512, 512, 3, 1, 1)]
+    layers += [nn.Conv2d(512, 512, 3, 1, 1)]
+    layers += [nn.Conv2d(512, 512, 3, 1, 1)]
+    layers += [nn.Conv2d(512, 512, 3, 1, 1)]
+    layers += [nn.ReLU()]
+    return layers
+
+def norm(x, dim):
+    squared_norm = (x ** 2).sum(dim=dim, keepdim=True)
+    normed = x / torch.sqrt(squared_norm)
+    return normed
+
+def fuse_hsp(x, p,group_size=5):
+    
+    t = torch.zeros(group_size, x.size(1))
+    for i in range(x.size(0)):
+        tmp = x[i, :]
+        if i == 0:
+            nx = tmp.expand_as(t)
+        else:
+            nx = torch.cat(([nx, tmp.expand_as(t)]), dim=0)
+    nx = nx.view(x.size(0)*group_size, x.size(1), 1, 1)
+    y = nx.expand_as(p)
+    return y
+
+
+class Model(nn.Module):
+    def __init__(self, device, base, incr_channel, incr_channel2, hsp1, hsp2, cls_m, cls, concat_r, concat_1, mask_branch, intra,demo_mode=False):
+        super(Model, self).__init__()
+        self.base = nn.ModuleList(base)
+        self.sp1 = hsp1
+        self.sp2 = hsp2
+        self.cls_m = cls_m
+        self.cls = cls
+        self.incr_channel1 = nn.ModuleList(incr_channel)
+        self.incr_channel2 = nn.ModuleList(incr_channel2)
+        self.concat4 = nn.ModuleList(concat_r)
+        self.concat3 = nn.ModuleList(concat_r)
+        self.concat2 = nn.ModuleList(concat_r)
+        self.concat1 = nn.ModuleList(concat_1)
+        self.mask = nn.ModuleList(mask_branch)
+        self.extract = [13, 23, 33, 43]
+        self.device = device
+        self.group_size = 5
+        self.intra = nn.ModuleList(intra)
+        self.transformer_1=Transformer(512,4,4,782,group=self.group_size)
+        self.transformer_2=Transformer(512,4,4,782,group=self.group_size)
+        self.demo_mode=demo_mode
+
+    def forward(self, x):
+        # backbone, p is the pool2, 3, 4, 5
+        p = list()
+        for k in range(len(self.base)):
+            x = self.base[k](x)
+            if k in self.extract:
+                p.append(x)
+        
+        
+        # increase the channel
+        newp = list()
+        newp_T=list()
+        for k in range(len(p)):
+            np = self.incr_channel1[k](p[k])
+            np = self.incr_channel2[k](np)
+            newp.append(self.incr_channel2[4](np))
+            if k==3:
+              tmp_newp_T3=self.transformer_1(newp[k])
+              newp_T.append(tmp_newp_T3)
+            if k==2:
+              newp_T.append(self.transformer_2(newp[k]))
+            if k<2:
+              newp_T.append(None)
+
+
+        # intra-MLP
+        point = newp[3].view(newp[3].size(0), newp[3].size(1), -1)
+        point = point.permute(0,2,1)
+
+        idx = knn_l2(self.device, point, 4, 1)
+        feat=idx
+        new_point = index_points(self.device, point,idx)
+
+        group_point = new_point.permute(0, 3, 2, 1)
+        group_point = self.intra[0](group_point)
+        group_point = torch.max(group_point, 2)[0]  # [B, D', S]
+
+        intra_mask = group_point.view(group_point.size(0), group_point.size(1), 7, 7)
+        intra_mask = intra_mask + newp[3]
+        
+        spa_mask = self.intra[1](intra_mask)
+
+
+        x = newp[3]
+        x = self.sp1(x)
+        x = x.view(-1, x.size(1), x.size(2) * x.size(3))
+        x = torch.bmm(x, x.transpose(1, 2))
+        x = x.view(-1, x.size(1) * x.size(2))
+        x = x.view(x.size(0) // self.group_size, x.size(1), -1, 1)
+        x = self.sp2(x)
+        x = x.view(-1, x.size(1), x.size(2) * x.size(3))
+        x = torch.bmm(x, x.transpose(1, 2))
+        x = x.view(-1, x.size(1) * x.size(2))
+
+        #cls pred
+        cls_modulated_vector = self.cls_m(x)
+        cls_pred = self.cls(cls_modulated_vector)
+
+        #semantic and spatial modulator
+        g1 = fuse_hsp(cls_modulated_vector, newp[0],self.group_size)
+        g2 = fuse_hsp(cls_modulated_vector, newp[1],self.group_size)
+        g3 = fuse_hsp(cls_modulated_vector, newp[2],self.group_size)
+        g4 = fuse_hsp(cls_modulated_vector, newp[3],self.group_size)
+
+        spa_1 = F.interpolate(spa_mask, size=[g1.size(2), g1.size(3)], mode='bilinear')
+        spa_1 = spa_1.expand_as(g1)
+        spa_2 = F.interpolate(spa_mask, size=[g2.size(2), g2.size(3)], mode='bilinear')
+        spa_2 = spa_2.expand_as(g2)
+        spa_3 = F.interpolate(spa_mask, size=[g3.size(2), g3.size(3)], mode='bilinear')
+        spa_3 = spa_3.expand_as(g3)
+        spa_4 = F.interpolate(spa_mask, size=[g4.size(2), g4.size(3)], mode='bilinear')
+        spa_4 = spa_4.expand_as(g4)
+        
+        y4 = newp_T[3] * g4 + spa_4
+        for k in range(len(self.concat4)):
+            y4 = self.concat4[k](y4)
+        
+        y3 = newp_T[2] * g3 + spa_3
+        
+        for k in range(len(self.concat3)):
+            y3 = self.concat3[k](y3)
+            if k == 1:
+                y3 = y3 + y4
+        
+        y2 = newp[1] * g2 + spa_2
+        
+        #print(y2.shape)
+        
+        for k in range(len(self.concat2)):
+            y2 = self.concat2[k](y2)
+            if k == 1:
+                y2 = y2 + y3
+        y1 = newp[0] * g1 + spa_1
+
+        for k in range(len(self.concat1)):
+            y1 = self.concat1[k](y1)
+            if k == 1:
+                y1 = y1 + y2
+        y = y1
+        if self.demo_mode:
+            tmp=F.interpolate(y1, size=[14,14], mode='bilinear')
+            tmp=tmp.permute(0,2,3,1).contiguous().reshape(tmp.shape[0]*tmp.shape[2]*tmp.shape[3],tmp.shape[1])
+            tmp=tmp/torch.norm(tmp,p=2,dim=1).unsqueeze(1)
+            feat2=([email protected]())
+            feat=F.interpolate(y, size=[14,14], mode='bilinear')
+        
+        # decoder
+        for k in range(len(self.mask)):
+            
+            y = self.mask[k](y)
+        mask_pred = y[:, 0, :, :]
+        if self.demo_mode:
+            return cls_pred, mask_pred,feat,feat2
+        else:
+            return cls_pred, mask_pred
+
+
+
+# build the whole network
+def build_model(device,demo_mode=False):
+    return Model(device,
+                 vgg(base['vgg']),
+                 incr_channel(),
+                 incr_channel2(),
+                 hsp(512, 64),
+                 hsp(64**2, 32),
+                 cls_modulation_branch(32**2, 512),
+                 cls_branch(512, 78),
+                 concat_r(),
+                 concat_1(),
+                 mask_branch(),
+                 intra(),demo_mode)
+
+# weight init
+def xavier(param):
+    init.xavier_uniform_(param)
+
+def weights_init(m):
+    if isinstance(m, nn.Conv2d):
+        xavier(m.weight.data)
+    elif isinstance(m, nn.BatchNorm2d):
+        init.constant_(m.weight, 1)
+        init.constant_(m.bias, 0)
+
+'''import os
+os.environ['CUDA_VISIBLE_DEVICES']='6'
+gpu_id='cuda:0'
+device = torch.device(gpu_id)
+nt=build_model(device).to(device)
+it=2
+bs=1
+gs=5
+sum=0
+with torch.no_grad():
+  for i in range(it):
+    A=torch.rand(bs*gs,3,448,256).cuda()
+    A=A*2-1
+    start=time.time()
+    nt(A)
+    sum+=time.time()-start
+print(sum/bs/gs/it)'''
+