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Co-Authored-By: Ryan Dick <14897797+RyanJDick@users.noreply.github.com>
This commit is contained in:
Sergey Borisov
2024-07-22 23:09:11 +03:00
parent 1748848b7b
commit 5f0fe3c8a9
3 changed files with 14 additions and 21 deletions
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4
invokeai/backend/stable_diffusion/diffusion_backend.py
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@ -100,8 +100,8 @@ class StableDiffusionBackend:
if isinstance(guidance_scale, list):
guidance_scale = guidance_scale[ctx.step_index]
# Note: Although logically it same, it seams that precision errors differs.
# This sometimes results in slightly different output.
# Note: Although this `torch.lerp(...)` line is logically equivalent to the current CFG line, it seems to result
# in slightly different outputs. It is suspected that this is caused by small precision differences.
# return torch.lerp(ctx.negative_noise_pred, ctx.positive_noise_pred, guidance_scale)
return ctx.negative_noise_pred + guidance_scale * (ctx.positive_noise_pred - ctx.negative_noise_pred)