Update app.py

app.py

@@ -28,7 +28,7 @@ def morph_images(img1, img2, alpha):
     if lm1 is None or lm2 is None:
         return Image.fromarray(cv2.cvtColor(img1, cv2.COLOR_BGR2RGB))  # fallback
 
-    lm_avg = ((1 - alpha) * lm1 + alpha * lm2).astype(np.int32)
+    lm_avg = ((1 - alpha) * lm1 + alpha * lm2).astype(np.float32)
 
     rect = (0, 0, img1.shape[1], img1.shape[0])
     subdiv = cv2.Subdiv2D(rect)