Update app.py

app.py

@@ -36,8 +36,8 @@ def infer(
     w = conditioning_image.width
     h = conditioning_image.height
     ratio = 768 / max(w, h)
-    w = int(W * ratio)
-    h = int(H * ratio)
+    w = int(w * ratio)
+    h = int(h * ratio)
     g_cpu = torch.Generator()
 
     if seed == -1: