Energy-Conditioned Noise Schedule and Whitening for Spectral Diffusion

The paper proposes an energy‑adaptive noise scheduling and whitening strategy for transform‑domain diffusion models. By aligning the forward diffusion process with the spectral energy distribution of natural images, the method jointly modulates injected noise based on individual transform coefficient energy and an image‑dependent energy path over diffusion time. Experiments on CIFAR‑10 show that this approach reduces the Fréchet Inception Distance from 142.48 to 100.45 for a compact DCT‑diff U‑Net variant.

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• diffusion