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今天的主题是：Is Noise Conditioning Necessary for Denoising Generative Models?

Summary

This research investigates the common belief that noise conditioning is essential for denoising generative models. The authors surprisingly found that many of these models can still function effectively, and sometimes even better, without explicitly providing the noise level. They provide a theoretical analysis explaining this robustness and introduce a noise-unconditional model that achieves competitive image generation results, suggesting that revisiting the necessity of noise conditioning could lead to new advancements in the field.

本研究探讨了一个普遍观点：噪声条件输入对于去噪生成模型是必不可少的。令人意外的是，作者发现许多此类模型即便在未明确提供噪声水平的情况下，仍然能够有效运行，甚至在某些情况下表现更佳。他们提供了理论分析来解释这一鲁棒性，并提出了一种“无噪声条件”模型，在图像生成任务中取得了具有竞争力的结果。该研究表明，重新审视噪声条件输入的必要性，可能为该领域带来新的突破。

原文链接：https://arxiv.org/abs/2502.13129