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# coding=utf-8
# Copyright 2022 HuggingFace Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import unittest
import numpy as np
from transformers.testing_utils import require_torch, require_vision
from transformers.utils import is_torch_available, is_vision_available
from ...test_image_processing_common import ImageProcessingSavingTestMixin
if is_torch_available():
import torch
if is_vision_available():
from PIL import Image
from transformers import Swin2SRImageProcessor
from transformers.image_transforms import get_image_size
class Swin2SRImageProcessingTester(unittest.TestCase):
def __init__(
self,
parent,
batch_size=7,
num_channels=3,
image_size=18,
min_resolution=30,
max_resolution=400,
do_rescale=True,
rescale_factor=1 / 255,
do_pad=True,
pad_size=8,
):
self.parent = parent
self.batch_size = batch_size
self.num_channels = num_channels
self.image_size = image_size
self.min_resolution = min_resolution
self.max_resolution = max_resolution
self.do_rescale = do_rescale
self.rescale_factor = rescale_factor
self.do_pad = do_pad
self.pad_size = pad_size
def prepare_image_processor_dict(self):
return {
"do_rescale": self.do_rescale,
"rescale_factor": self.rescale_factor,
"do_pad": self.do_pad,
"pad_size": self.pad_size,
}
def prepare_inputs(self, equal_resolution=False, numpify=False, torchify=False):
"""This function prepares a list of PIL images, or a list of numpy arrays if one specifies numpify=True,
or a list of PyTorch tensors if one specifies torchify=True.
"""
assert not (numpify and torchify), "You cannot specify both numpy and PyTorch tensors at the same time"
if equal_resolution:
image_inputs = []
for i in range(self.batch_size):
image_inputs.append(
np.random.randint(
255, size=(self.num_channels, self.max_resolution, self.max_resolution), dtype=np.uint8
)
)
else:
image_inputs = []
for i in range(self.batch_size):
width, height = np.random.choice(np.arange(self.min_resolution, self.max_resolution), 2)
image_inputs.append(np.random.randint(255, size=(self.num_channels, width, height), dtype=np.uint8))
if not numpify and not torchify:
# PIL expects the channel dimension as last dimension
image_inputs = [Image.fromarray(np.moveaxis(x, 0, -1)) for x in image_inputs]
if torchify:
image_inputs = [torch.from_numpy(x) for x in image_inputs]
return image_inputs
@require_torch
@require_vision
class Swin2SRImageProcessingTest(ImageProcessingSavingTestMixin, unittest.TestCase):
image_processing_class = Swin2SRImageProcessor if is_vision_available() else None
def setUp(self):
self.image_processor_tester = Swin2SRImageProcessingTester(self)
@property
def image_processor_dict(self):
return self.image_processor_tester.prepare_image_processor_dict()
def test_image_processor_properties(self):
image_processor = self.image_processing_class(**self.image_processor_dict)
self.assertTrue(hasattr(image_processor, "do_rescale"))
self.assertTrue(hasattr(image_processor, "rescale_factor"))
self.assertTrue(hasattr(image_processor, "do_pad"))
self.assertTrue(hasattr(image_processor, "pad_size"))
def test_batch_feature(self):
pass
def calculate_expected_size(self, image):
old_height, old_width = get_image_size(image)
size = self.image_processor_tester.pad_size
pad_height = (old_height // size + 1) * size - old_height
pad_width = (old_width // size + 1) * size - old_width
return old_height + pad_height, old_width + pad_width
def test_call_pil(self):
# Initialize image_processor
image_processor = self.image_processing_class(**self.image_processor_dict)
# create random PIL images
image_inputs = self.image_processor_tester.prepare_inputs(equal_resolution=False)
for image in image_inputs:
self.assertIsInstance(image, Image.Image)
# Test not batched input
encoded_images = image_processor(image_inputs[0], return_tensors="pt").pixel_values
expected_height, expected_width = self.calculate_expected_size(np.array(image_inputs[0]))
self.assertEqual(
encoded_images.shape,
(
1,
self.image_processor_tester.num_channels,
expected_height,
expected_width,
),
)
def test_call_numpy(self):
# Initialize image_processor
image_processor = self.image_processing_class(**self.image_processor_dict)
# create random numpy tensors
image_inputs = self.image_processor_tester.prepare_inputs(equal_resolution=False, numpify=True)
for image in image_inputs:
self.assertIsInstance(image, np.ndarray)
# Test not batched input
encoded_images = image_processor(image_inputs[0], return_tensors="pt").pixel_values
expected_height, expected_width = self.calculate_expected_size(image_inputs[0])
self.assertEqual(
encoded_images.shape,
(
1,
self.image_processor_tester.num_channels,
expected_height,
expected_width,
),
)
def test_call_pytorch(self):
# Initialize image_processor
image_processor = self.image_processing_class(**self.image_processor_dict)
# create random PyTorch tensors
image_inputs = self.image_processor_tester.prepare_inputs(equal_resolution=False, torchify=True)
for image in image_inputs:
self.assertIsInstance(image, torch.Tensor)
# Test not batched input
encoded_images = image_processor(image_inputs[0], return_tensors="pt").pixel_values
expected_height, expected_width = self.calculate_expected_size(image_inputs[0])
self.assertEqual(
encoded_images.shape,
(
1,
self.image_processor_tester.num_channels,
expected_height,
expected_width,
),
)
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