Comments (1)
chenguolin
commented on May 27, 2024
1
I think I have found the answer and will close this issue.
The definition of "linear" is strange in Stable Diffusion / Zero123 (https://github.com/cvlab-columbia/zero123/blob/f426883b1a7353d91ddc34a551dd91b6223e4ce8/zero123/ldm/modules/diffusionmodules/util.py#L24). The noise schedule
betas = torch.linspace(linear_start ** 0.5, linear_end ** 0.5, n_timestep, dtype=torch.float64) ** 2
is named "linear" in the Stable Diffusion / Zero123 codebase. While it is named as "scaled_linear" in diffusers (https://github.com/huggingface/diffusers/blob/f912f39b50f87e50a9d99346f5c1b6e644653262/src/diffusers/schedulers/scheduling_ddpm.py#L161)
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