fix a bug with ddim and predict x0 objective

andrewmoise · Jul 19, 2022 · 37334ae · 37334ae
1 parent 6eba6cd
commit 37334ae
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Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/denoising_diffusion_pytorch/denoising_diffusion_pytorch.py b/denoising_diffusion_pytorch/denoising_diffusion_pytorch.py
@@ -479,7 +479,7 @@ def predict_start_from_noise(self, x_t, t, noise):
 
     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)
         )
 

diff --git a/setup.py b/setup.py
@@ -3,7 +3,7 @@
 setup(
   name = 'denoising-diffusion-pytorch',
   packages = find_packages(),
-  version = '0.26.0',
+  version = '0.26.1',
   license='MIT',
   description = 'Denoising Diffusion Probabilistic Models - Pytorch',
   author = 'Phil Wang',