Generating dataset from: roadscene_train\img001.json Traceback (most recent call last): File "labelme2voc.py", line 95, in <module> main() File "labelme2voc.py", line 85, in main labelme.utils.lblsave(out_png_file, lbl) File "...\.conda\envs\label_me\lib\site-packages\labelme\utils\_io.py", line 14, in lblsave if lbl.min() >= -1 and lbl.max() < 255: AttributeError: 'tuple' object has no attribute 'min'