fix parsing line error

[WZMIAOMIAO]

对于有些特别小的目标区域（或者说标注有问题的数据），通过pyclipper收缩后得到的result是一个空列表，在PaddleOCR官方源码中，是没有对padding.Execute的结果做判断的，当结果为空列表时，就会引发Error，详情可参看#5101

PaddleOCR/ppocr/data/imaug/make_border_map.py

Line 81 in fb3d36a

padded_polygon = np.array(padding.Execute(distance)[0])

报错信息如下：

[2021/12/23 12:41:26] root INFO: train dataloader has 94 iters
[2021/12/23 12:41:26] root INFO: valid dataloader has 250 iters
[2021/12/23 12:41:26] root INFO: During the training process, after the 0th iteration, an evaluation is run every 500 iterations
[2021/12/23 12:41:26] root INFO: Initialize indexs of datasets:['/home/aistudio/work/data/det_data_lesson_demo/train.txt']
[2021/12/23 12:41:54] root INFO: epoch: [1/100], iter: 10, lr: 0.000027, loss: 9.582685, loss_shrink_maps: 4.681584, loss_threshold_maps: 3.961636, loss_binary_maps: 0.939466, reader_cost: 1.81348 s, batch_cost: 2.77511 s, samples: 88, ips: 3.17105
[2021/12/23 12:41:58] root ERROR: When parsing line mtwi/train/TB1_5H8n3vD8KJjy0FlXXagBFXa_!!0-item_pic.jpg.jpg	[{"transcription": "\u6d53\u7f29\u9664\u81ed\u6db2", "points": [[473.55, 99.64], [456.18, 41.82], [778.73, 39.82], [777.73, 105.82]]}, {"transcription": "1000ml", "points": [[476.27, 158.73], [477.27, 129.09], [618.55, 124.09], [618.55, 158.73]]}, {"transcription": "\u62b510\u74f6", "points": [[647.55, 121.64], [652.55, 165.64], [771.09, 166.64], [773.09, 121.64]]}, {"transcription": "\u9001", "points": [[691.82, 347.45], [690.82, 437.36], [768.55, 426.36], [777.0, 345.36]]}, {"transcription": "YaHo\u4e9a\u79be", "points": [[94.0, 289.0], [94.0, 305.73], [164.73, 305.73], [164.73, 287.0]]}, {"transcription": "YaHo\u4e9a\u79be", "points": [[242.55, 290.0], [242.55, 303.27], [317.45, 303.27], [316.45, 287.0]]}, {"transcription": "YaHo\u4e9a\u79be", "points": [[650.55, 476.36], [651.55, 485.82], [694.91, 486.82], [695.91, 477.36]]}, {"transcription": "Disiuf", "points": [[48.36, 325.55], [46.55, 359.09], [154.55, 363.45], [156.55, 330.55]]}, {"transcription": "spray", "points": [[61.45, 362.73], [61.45, 378.91], [123.27, 377.0], [121.27, 361.91]]}, {"transcription": "spray", "points": [[211.73, 360.27], [214.73, 377.73], [272.64, 377.73], [269.64, 360.27]]}, {"transcription": "Disiufectaut", "points": [[198.73, 324.55], [199.73, 361.82], [387.0, 357.82], [390.0, 328.55]]}, {"transcription": "\u5ba0\u7269\u9664\u81ed\u6db2", "points": [[271.64, 379.64], [272.64, 400.0], [369.82, 399.0], [371.82, 381.64]]}, {"transcription": "\u5ba0\u7269", "points": [[125.73, 379.64], [122.73, 399.27], [153.82, 401.27], [154.82, 381.64]]}, {"transcription": "\u6d53\u7f29\u578b", "points": [[63.82, 380.82], [67.82, 397.55], [116.73, 399.55], [114.73, 382.82]]}, {"transcription": "\u6d53\u7f29\u578b", "points": [[216.91, 382.55], [214.91, 401.27], [267.27, 399.27], [269.27, 383.55]]}, {"transcription": "\u8309\u8389\u82b1\u82ac\u82b3", "points": [[63.18, 422.09], [61.18, 429.36], [104.82, 429.36], [105.82, 422.09]]}, {"transcription": "\u8309\u8389\u82b1\u82ac\u82b3", "points": [[211.73, 421.09], [211.73, 429.82], [256.64, 430.82], [254.64, 421.09]]}, {"transcription": "\u51c0\u542b\u91cf\uff1a1000ML", "points": [[63.18, 442.91], [61.18, 454.55], [144.36, 453.55], [143.36, 442.91]]}, {"transcription": "\u51c0\u542b\u91cf\uff1a1000ML", "points": [[216.18, 444.64], [213.18, 457.27], [294.91, 454.27], [296.91, 445.64]]}, {"transcription": "\u51c0\u542b\u91cf", "points": [[703.8, 615.47], [705.8, 621.8], [721.4, 620.8], [723.4, 615.47]]}, {"transcription": "500ML", "points": [[704.2, 622.4], [702.2, 626.67], [720.2, 627.67], [720.2, 622.4]]}, {"transcription": "\u8309\u8389\u82b1\u82ac\u82b3", "points": [[661.07, 546.13], [661.07, 553.53], [689.93, 553.53], [691.93, 547.13]]}, {"transcription": "\u5ba0\u7269\u795b\u5473\u55b7\u96fe", "points": [[640.8, 537.13], [642.8, 526.87], [713.2, 526.87], [710.2, 537.13]]}, {"transcription": "Healthy", "points": [[62.27, 408.93], [64.27, 419.6], [101.07, 417.6], [103.07, 408.93]]}, {"transcription": "Antiscptic", "points": [[104.27, 408.53], [104.27, 420.67], [152.33, 420.67], [154.33, 408.53]]}, {"transcription": "###", "points": [[213.13, 406.93], [215.13, 417.0], [249.33, 417.0], [249.33, 406.93]]}, {"transcription": "Antiscptic&DeodorantForPet", "points": [[253.13, 417.0], [253.6, 408.47], [408.2, 407.93], [401.27, 418.07]]}, {"transcription": "Healthy", "points": [[224.2, 406.4], [224.2, 407.93], [221.67, 406.93], [223.67, 407.4]]}, {"transcription": "DEODORANT", "points": [[627.0, 505.07], [627.0, 496.47], [724.53, 495.47], [724.53, 505.07]]}, {"transcription": "SPRAY", "points": [[651.47, 519.87], [651.47, 509.2], [698.0, 508.2], [702.0, 518.87]]}, {"transcription": "\u4e70\u4e00\u9001\u4e00", "points": [[27.07, 790.8], [12.93, 645.2], [484.67, 631.93], [450.8, 786.27]]}, {"transcription": "###", "points": [[123.93, 700.2], [121.93, 700.73], [124.47, 700.73], [124.47, 700.2]]}, {"transcription": "\u5206\u89e3\u81ed\u5473", "points": [[515.0, 793.07], [514.0, 710.53], [786.0, 700.53], [793.0, 784.07]]}, {"transcription": "\u9001\u9664\u81ed\u55b7\u96fe500ml", "points": [[522.2, 698.0], [522.2, 666.47], [786.87, 662.47], [788.87, 697.0]]}]
, error happened with msg: Traceback (most recent call last):
  File "/home/aistudio/work/PaddleOCR/ppocr/data/simple_dataset.py", line 119, in __getitem__
    outs = transform(data, self.ops)
  File "/home/aistudio/work/PaddleOCR/ppocr/data/imaug/__init__.py", line 43, in transform
    data = op(data)
  File "/home/aistudio/work/PaddleOCR/ppocr/data/imaug/make_border_map.py", line 60, in __call__
    self.draw_border_map(text_polys[i], canvas, mask=mask)
  File "/home/aistudio/work/PaddleOCR/ppocr/data/imaug/make_border_map.py", line 81, in draw_border_map
    padded_polygon = np.array(padding.Execute(distance)[0])
IndexError: list index out of range

[paddle-bot-old]

Thanks for your contribution!

[paddle-bot]

Automatically closed by Paddle-bot.