Update utils.py

utils.py

@@ -622,7 +622,8 @@ def display_instances(image, boxes, masks, class_ids, class_names,
     """
     image = np.array(image)
     boxes = np.array(boxes)
-    masks = masks.permute(1, 2, 0)
+    masks = np.array(masks)
+    masks = masks.transpose(1, 2, 0)
     # Number of instances
     N = boxes.shape[0]
     if not N: