lableme安装+基础操作
【labelme】13分钟教会你使用labelme的超详细教程_哔哩哔哩_bilibili
conda activate labelme
labelme images --labels labels.txt --nodata --validatelabel exact --config '{shift_auto_shape_color: -2}'
python labelme2voc.py images target --labels labels.txt
https://github.com/wkentaro/labelme/blob/main/examples/semantic_segmentation/labelme2voc.py