Perception Prioritized Training of Diffusion Models

• URL: http://arxiv.org/abs/2204.00227v1
• Date: Fri, 1 Apr 2022 06:22:23 GMT
• Title: Perception Prioritized Training of Diffusion Models
• Authors: Jooyoung Choi, Jungbeom Lee, Chaehun Shin, Sungwon Kim, Hyunwoo Kim, Sungroh Yoon
• Abstract summary: We show that restoring data corrupted with certain noise levels offers a proper pretext for the model to learn rich visual concepts. We propose to prioritize such noise levels over other levels during training, by redesigning the weighting scheme of the objective function.
• Score: 34.674477039333475
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Diffusion models learn to restore noisy data, which is corrupted with different levels of noise, by optimizing the weighted sum of the corresponding loss terms, i.e., denoising score matching loss. In this paper, we show that restoring data corrupted with certain noise levels offers a proper pretext task for the model to learn rich visual concepts. We propose to prioritize such noise levels over other levels during training, by redesigning the weighting scheme of the objective function. We show that our simple redesign of the weighting scheme significantly improves the performance of diffusion models regardless of the datasets, architectures, and sampling strategies.

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