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| # coding=utf-8 | |
| # Copyright 2023 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 | |
| import torch | |
| from diffusers import KarrasVePipeline, KarrasVeScheduler, UNet2DModel | |
| from diffusers.utils.testing_utils import require_torch, slow, torch_device | |
| torch.backends.cuda.matmul.allow_tf32 = False | |
| class KarrasVePipelineFastTests(unittest.TestCase): | |
| def dummy_uncond_unet(self): | |
| torch.manual_seed(0) | |
| model = UNet2DModel( | |
| block_out_channels=(32, 64), | |
| layers_per_block=2, | |
| sample_size=32, | |
| in_channels=3, | |
| out_channels=3, | |
| down_block_types=("DownBlock2D", "AttnDownBlock2D"), | |
| up_block_types=("AttnUpBlock2D", "UpBlock2D"), | |
| ) | |
| return model | |
| def test_inference(self): | |
| unet = self.dummy_uncond_unet | |
| scheduler = KarrasVeScheduler() | |
| pipe = KarrasVePipeline(unet=unet, scheduler=scheduler) | |
| pipe.to(torch_device) | |
| pipe.set_progress_bar_config(disable=None) | |
| generator = torch.manual_seed(0) | |
| image = pipe(num_inference_steps=2, generator=generator, output_type="numpy").images | |
| generator = torch.manual_seed(0) | |
| image_from_tuple = pipe(num_inference_steps=2, generator=generator, output_type="numpy", return_dict=False)[0] | |
| image_slice = image[0, -3:, -3:, -1] | |
| image_from_tuple_slice = image_from_tuple[0, -3:, -3:, -1] | |
| assert image.shape == (1, 32, 32, 3) | |
| expected_slice = np.array([0.0, 1.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0]) | |
| assert np.abs(image_slice.flatten() - expected_slice).max() < 1e-2 | |
| assert np.abs(image_from_tuple_slice.flatten() - expected_slice).max() < 1e-2 | |
| class KarrasVePipelineIntegrationTests(unittest.TestCase): | |
| def test_inference(self): | |
| model_id = "google/ncsnpp-celebahq-256" | |
| model = UNet2DModel.from_pretrained(model_id) | |
| scheduler = KarrasVeScheduler() | |
| pipe = KarrasVePipeline(unet=model, scheduler=scheduler) | |
| pipe.to(torch_device) | |
| pipe.set_progress_bar_config(disable=None) | |
| generator = torch.manual_seed(0) | |
| image = pipe(num_inference_steps=20, generator=generator, output_type="numpy").images | |
| image_slice = image[0, -3:, -3:, -1] | |
| assert image.shape == (1, 256, 256, 3) | |
| expected_slice = np.array([0.578, 0.5811, 0.5924, 0.5809, 0.587, 0.5886, 0.5861, 0.5802, 0.586]) | |
| assert np.abs(image_slice.flatten() - expected_slice).max() < 1e-2 | |