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Applying Guidance in a Limited Interval Improves Sample and Distribution Quality in Diffusion Models
April 12, 2024, 4:42 a.m. | Tuomas Kynk\"a\"anniemi, Miika Aittala, Tero Karras, Samuli Laine, Timo Aila, Jaakko Lehtinen
cs.LG updates on arXiv.org arxiv.org
Abstract: Guidance is a crucial technique for extracting the best performance out of image-generating diffusion models. Traditionally, a constant guidance weight has been applied throughout the sampling chain of an image. We show that guidance is clearly harmful toward the beginning of the chain (high noise levels), largely unnecessary toward the end (low noise levels), and only beneficial in the middle. We thus restrict it to a specific range of noise levels, improving both the inference …
abstract arxiv cs.ai cs.cv cs.lg cs.ne diffusion diffusion models distribution guidance image interval performance quality sample sampling show stat.ml type
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