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Poster

Multistep Distillation of Diffusion Models via Moment Matching

Tim Salimans · Thomas Mensink · Jonathan Heek · Emiel Hoogeboom

East Exhibit Hall A-C #2603
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Fri 13 Dec 11 a.m. PST — 2 p.m. PST

Abstract:

We present a new method for making diffusion models faster to sample. The method distills many-step diffusion models into few-step models by matching conditional expectations of the clean data given noisy data along the sampling trajectory. Our approach extends recently proposed one-step methods to the multi-step case, and provides a new perspective by interpreting these approaches in terms of moment matching. By using up to 8 sampling steps, we obtain distilled models that outperform not only their one-step versions but also their original many-step teacher models, obtaining new state-of-the-art results on the Imagenet dataset. We also show promising results on a large text-to-image model where we achieve fast generation of high resolution images directly in image space, without needing autoencoders or upsamplers.

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