The paper reports a training-free extrapolation method that combines per-patch prompt selection from cross-attention masks, ControlNet edge guidance, and permuted dilated sampling to reduce repetition and distortion at 4x to 16x upscales.
Diffusion models beat gans on image synthesis,
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AccDiffusion v2: Towards More Accurate Higher-Resolution Diffusion Extrapolation
The paper reports a training-free extrapolation method that combines per-patch prompt selection from cross-attention masks, ControlNet edge guidance, and permuted dilated sampling to reduce repetition and distortion at 4x to 16x upscales.