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Papers
arxiv:2502.12154

Diffusion Models without Classifier-free Guidance

Published on Feb 17, 2025
· Submitted by
tzco
on Feb 18, 2025
Authors:
,
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Abstract

Model-guidance improves diffusion model training by incorporating posterior probabilities, removing the need for Classifier-free guidance, and achieving faster inference and superior quality.

AI-generated summary

This paper presents Model-guidance (MG), a novel objective for training diffusion model that addresses and removes of the commonly used Classifier-free guidance (CFG). Our innovative approach transcends the standard modeling of solely data distribution to incorporating the posterior probability of conditions. The proposed technique originates from the idea of CFG and is easy yet effective, making it a plug-and-play module for existing models. Our method significantly accelerates the training process, doubles the inference speed, and achieve exceptional quality that parallel and even surpass concurrent diffusion models with CFG. Extensive experiments demonstrate the effectiveness, efficiency, scalability on different models and datasets. Finally, we establish state-of-the-art performance on ImageNet 256 benchmarks with an FID of 1.34. Our code is available at https://github.com/tzco/Diffusion-wo-CFG.

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See our code at github.com/tzco/Diffusion-wo-CFG

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