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the calculation of classifier-free guided eps is wrong? #11

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leon532 opened this issue Nov 1, 2024 · 0 comments

leon532 commented Nov 1, 2024

hart/hart/modules/diffusion/diffloss.py

Line 268 in e28a41f

half_eps = cond_eps * (1 + cfg_scale) - cfg_scale * uncond_eps

the calculation of classifier-free guided eps maybe wrong?

The correct should be:
half_eps = uncond_eps + cfg_scale * (cond_eps - uncond_eps)

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