labelme版本问题报错，低版本标注，高版本更改格式

[WARNING] label_file:load:102 - This JSON file (D:\Project\fen_ge_guan\1.json) may be incompatible with current labelme. version in file: 3.16.2, current version: 5.0.1
Traceback (most recent call last):
  File "D:/Project/mmsegmentation-0.20.2/mmsegmentation-0.20.2/data/semantic_segmentation/labelme2voc.py", line 110, in <module>
    main()
  File "D:/Project/mmsegmentation-0.20.2/mmsegmentation-0.20.2/data/semantic_segmentation/labelme2voc.py", line 101, in main
    imgviz.rgb2gray(img),
  File "D:\anaconda\envs\pytorch\lib\site-packages\imgviz\color.py", line 23, in rgb2gray
    assert rgb.shape[2] == 3, "rgb shape must be (H, W, 3)"
AssertionError: rgb shape must be (H, W, 3)

pip install -U labelme

1.升级labelme并重新标注。

2.还有一个问题是使用的是png图片，这是不行的，因为png是RGBA，得使用jpg图片。而且在转换的时候注意，不要用更改文件名的方式xxx.png改为xxx.jpg。同时要修改json文件中的格式说明。