Update app.py

app.py

@@ -38,7 +38,7 @@ def visualize_instance_seg_mask(mask):
 
     window_vertices = np.array([[x, 0, -y] for x, y in window])
         # Perform Delaunay triangulation
-    tri = Delaunay(vertices[:, :2])  # Triangulate only based on x and y coordinates
+    tri = Delaunay(window_vertices[:, :2])  # Triangulate only based on x and y coordinates
     
     # Extract indices
     indices = tri.simplices