address #293

Author: lucidrains

denoising_diffusion_pytorch/karras_unet.py

@@ -124,6 +124,12 @@ def forward(self, x):
 # forced weight normed conv2d and linear
 # algorithm 1 in paper
 
+def normalize_weight(weight, eps = 1e-4):
+    weight, ps = pack_one(weight, 'o *')
+    normed_weight = l2norm(weight, eps = eps)
+    normed_weight = normed_weight * sqrt(weight.numel() / weight.shape[0])
+    return unpack_one(normed_weight, ps, 'o *')
+
 class Conv2d(Module):
     def __init__(
         self,
@@ -142,14 +148,13 @@ def __init__(
         self.concat_ones_to_input = concat_ones_to_input
 
     def forward(self, x):
+
         if self.training:
             with torch.no_grad():
-                weight, ps = pack_one(self.weight, 'o *')
-                normed_weight = l2norm(weight, eps = self.eps)
-                normed_weight = unpack_one(normed_weight, ps, 'o *')
+                normed_weight = normalize_weight(self.weight, eps = self.eps)
                 self.weight.copy_(normed_weight)
 
-        weight = l2norm(self.weight, eps = self.eps) / sqrt(self.fan_in)
+        weight = normalize_weight(self.weight, eps = self.eps) / sqrt(self.fan_in)
 
         if self.concat_ones_to_input:
             x = F.pad(x, (0, 0, 0, 0, 1, 0), value = 1.)

denoising_diffusion_pytorch/version.py

@@ -1 +1 @@
-__version__ = '1.10.10'
+__version__ = '1.10.11'