opencv的yolo报错：IndexError: invalid index to scalar variable

Posted 2023-03-10 zhangphil

opencv的yolo报错：IndexError: invalid index to scalar variable，Python

几年前写的老代码工程：

https://zhangphil.blog.csdn.net/article/details/102960822https://zhangphil.blog.csdn.net/article/details/102960822

 

重新运行后报错：

Traceback (most recent call last):
  File "D:\\code\\python\\yolo\\main.py", line 45, in <module>
    outputs = net.forward(get_output_layers(net))
                          ^^^^^^^^^^^^^^^^^^^^^^
  File "D:\\code\\python\\yolo\\main.py", line 9, in get_output_layers
    output_layers = [layer_names[arr[0] - 1] for arr in net.getUnconnectedOutLayers()]
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "D:\\code\\python\\yolo\\main.py", line 9, in <listcomp>
    output_layers = [layer_names[arr[0] - 1] for arr in net.getUnconnectedOutLayers()]
                                 ~~~^^^
IndexError: invalid index to scalar variable.

 

原因是opencv版本升级。解决方案，把第9行代码：

 output_layers = [layer_names[arr[0] - 1] for arr in net.getUnconnectedOutLayers()]

 

修改成：

output_layers = [layer_names[i - 1] for i in net.getUnconnectedOutLayers()]

然后重新运行成功。