298977887/ComfyUI
1
0
Fork 0
mirror of https://github.com/comfyanonymous/ComfyUI.git synced 2025-01-25 15:55:18 +00:00
Code Issues Packages Projects Releases Wiki Activity

Use torch.special.expm1

Browse Source 
This function provides greater precision than `exp(x) - 1` for small values of `x`.

Found with TorchFix https://github.com/pytorch-labs/torchfix/
This commit is contained in:
Sergii Dymchenko 2025-01-07 15:39:37 -08:00 committed by GitHub
parent d0f3752e33
commit e4e2d82b0f
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
comfy/k_diffusion/sampling.py
View File

@ -40,7 +40,7 @@ def get_sigmas_polyexponential(n, sigma_min, sigma_max, rho=1., device='cpu'):
def get_sigmas_vp(n, beta_d=19.9, beta_min=0.1, eps_s=1e-3, device='cpu'):
"""Constructs a continuous VP noise schedule."""
t = torch.linspace(1, eps_s, n, device=device)
sigmas = torch.sqrt(torch.exp(beta_d * t ** 2 / 2 + beta_min * t) - 1)
sigmas = torch.sqrt(torch.expm1(beta_d * t ** 2 / 2 + beta_min * t))
return append_zero(sigmas)