def box_xywh2xyxy(box): x = box[:, 0] y = box[:, 1] w = box[:, 2] h = box[:, 3] return fluid.layers.stack( [ x - w / 2., y - h / 2., x + w / 2., y + h / 2., ], axis=1) 之后在 _calc_obj_loss() 里面 gt = box_xywh2xyxy(fluid.layers.squeeze(...