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fix a bug with ddim and predict x0 objective

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This commit is contained in:
Phil Wang
2022-07-18 19:04:57 -07:00
parent 6eba6cdd50
commit 37334ae824
2 changed files with 2 additions and 2 deletions
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denoising_diffusion_pytorch/denoising_diffusion_pytorch.py
+1 -1
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@@ -479,7 +479,7 @@ class GaussianDiffusion(nn.Module):
def predict_noise_from_start(self, x_t, t, x0):
return (
(x0 - extract(self.sqrt_recip_alphas_cumprod, t, x_t.shape) * x_t) / \
(extract(self.sqrt_recip_alphas_cumprod, t, x_t.shape) * x_t - x0) / \
extract(self.sqrt_recipm1_alphas_cumprod, t, x_t.shape)
)