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这种json是什么标注的，怎么转png

<img width="1247" alt="iShot_2023-08-17_15 45 05" src="https://github.com/PaddlePaddle/Paddle/assets/84982391/0655cb83-e0d6-4565-a647-fed2fc09c003">

aistudio@jupyter-2065331-6652458:~/PaddleSeg$ python tools/data/labelme2seg.py dataset/data
Traceback (most recent call last):
  File "tools/data/labelme2seg.py", line 124, in <module>
    main(args)
  File "tools/data/labelme2seg.py", line 50, in main
    for shape in data['shapes']:
KeyError: 'shapes'

{
"labels":[
{
"name":"crack",
"x1":0,
"y1":438,
"x2":1023,
"y2":614,
"mask":"_>g0Zo00O1O1O10O01O100O010.....",
"shape":"brush",
"meta":{
"actions":""
},
"size":{
"height":1024,
"width":1024
}
},
{
"name":"crack",
"x1":615,
"y1":507,
"x2":803,
"y2":552,
"mask":" Xc07go04M2N2N2N10001N100......", "shape":"brush", "meta":{ "actions":"" }, "size":{ "height":1024, "width":1024 } } ] }