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Chitwan Saharia, Jonathan Ho, William Chan, Tim Salimans, David J. Fleet, Mohammad Norouzi
We present SR3, an approach to image Super-Resolution via Repeated Refinement. SR3 adapts denoising diffusion probabilistic models (Ho et al. 2020), (Sohl-Dickstein et al. 2015) to image-to-image translation, and performs super-resolution through a stochastic iterative denoising process. Output images are initialized with pure Gaussian noise and iteratively refined using a U-Net architecture that is trained on denoising at various noise levels, conditioned on a low-resolution input image. SR3 exhibits strong performance on super-resolution tasks at different magnification factors, on faces and natural images. We conduct human evaluation on a standard 8× face super-resolution task on CelebA-HQ for which SR3 achieves a fool rate close to 50%, suggesting photo-realistic outputs, while GAN baselines do not exceed a fool rate of 34%. We evaluate SR3 on a 4× super-resolution task on ImageNet, where SR3 outperforms baselines in human evaluation and classification accuracy of a ResNet-50 classifier trained on high-resolution images. We further show the effectiveness of SR3 in cascaded image generation, where a generative model is chained with super-resolution models to synthesize high-resolution images with competitive FID scores on the class-conditional 256×256 ImageNet generation challenge.
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Saharia, C., Ho, J., Chan, W., Salimans, T., Fleet, D. J., & Norouzi, M. (2022). Image Super-Resolution Via Iterative Refinement. IEEE Transactions on Pattern Analysis and Machine Intelligence, 45(4), 1–14. https://doi.org/10.1109/tpami.2022.3204461
Saharia, Chitwan, et al. "Image Super-Resolution Via Iterative Refinement." IEEE Transactions on Pattern Analysis and Machine Intelligence, vol. 45, no. 4, 2022, pp. 1–14, https://doi.org/10.1109/tpami.2022.3204461.
Saharia, Chitwan, Jonathan Ho, William Chan, Tim Salimans, David J. Fleet, and Mohammad Norouzi. "Image Super-Resolution Via Iterative Refinement." IEEE Transactions on Pattern Analysis and Machine Intelligence 45, no. 4 (2022): 1–14. https://doi.org/10.1109/tpami.2022.3204461.
Saharia C., Ho J., Chan W. [и др.] Image Super-Resolution Via Iterative Refinement // IEEE Transactions on Pattern Analysis and Machine Intelligence. — 2022. — Vol. 45, № 4. — P. 1–14. — URL: https://doi.org/10.1109/tpami.2022.3204461
@article{saharia2022image,
title = {{Image Super-Resolution Via Iterative Refinement}},
author = {Chitwan Saharia and Jonathan Ho and William Chan and Tim Salimans and David J. Fleet and Mohammad Norouzi},
journal = {IEEE Transactions on Pattern Analysis and Machine Intelligence},
year = {2022},
volume = {45},
number = {4},
pages = {1--14},
doi = {10.1109/tpami.2022.3204461},
url = {https://doi.org/10.1109/tpami.2022.3204461}
}TY - JOUR AU - Saharia, Chitwan AU - Ho, Jonathan AU - Chan, William AU - Salimans, Tim AU - Fleet, David J. AU - Norouzi, Mohammad TI - Image Super-Resolution Via Iterative Refinement JO - IEEE Transactions on Pattern Analysis and Machine Intelligence VL - 45 IS - 4 SP - 1 EP - 14 PY - 2022 DA - 2022/01/01 DO - 10.1109/tpami.2022.3204461 UR - https://doi.org/10.1109/tpami.2022.3204461 ER -
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