Update utils.py

utils.py

@@ -696,6 +696,7 @@ def extract_bboxes(mask):
     mask: [height, width, num_instances]. Mask pixels are either 1 or 0.
     Returns: bbox array [num_instances, (y1, x1, y2, x2)].
     """
+    mask = mask.transpose((1,2,0))
     boxes = np.zeros([mask.shape[-1], 4], dtype=np.int32)
     for i in range(mask.shape[-1]):
         m = mask[:, :, i]