File size: 3,020 Bytes
82de705 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 |
import copy
from importlib import import_module
__all__ = ['build_post_process']
# 定义类名到模块路径的映射
module_mapping = {
'CTCLabelDecode': '.ctc_postprocess',
'CharLabelDecode': '.char_postprocess',
'CELabelDecode': '.ce_postprocess',
'CPPDLabelDecode': '.cppd_postprocess',
'NRTRLabelDecode': '.nrtr_postprocess',
'ABINetLabelDecode': '.abinet_postprocess',
'ARLabelDecode': '.ar_postprocess',
'IGTRLabelDecode': '.igtr_postprocess',
'VisionLANLabelDecode': '.visionlan_postprocess',
'SMTRLabelDecode': '.smtr_postprocess',
'SRNLabelDecode': '.srn_postprocess',
'LISTERLabelDecode': '.lister_postprocess',
'MPGLabelDecode': '.mgp_postprocess',
'UniRecLabelDecode': '.unirec_postprocess',
'GTCLabelDecode': '.' # 当前模块中的类
}
def build_post_process(config, global_config=None):
config = copy.deepcopy(config)
module_name = config.pop('name')
if global_config is not None:
config.update(global_config)
assert module_name in module_mapping, Exception(
'post process only support {}'.format(list(module_mapping.keys())))
module_path = module_mapping[module_name]
# 处理当前模块中的类
if module_path == '.':
module_class = globals()[module_name]
else:
# 动态导入模块
module = import_module(module_path, package=__package__)
module_class = getattr(module, module_name)
return module_class(**config)
class GTCLabelDecode(object):
"""Convert between text-label and text-index."""
def __init__(self,
gtc_label_decode=None,
character_dict_path=None,
use_space_char=True,
only_gtc=False,
with_ratio=False,
**kwargs):
gtc_label_decode['character_dict_path'] = character_dict_path
gtc_label_decode['use_space_char'] = use_space_char
self.gtc_label_decode = build_post_process(gtc_label_decode)
self.ctc_label_decode = build_post_process({
'name':
'CTCLabelDecode',
'character_dict_path':
character_dict_path,
'use_space_char':
use_space_char
})
self.gtc_character = self.gtc_label_decode.character
self.ctc_character = self.ctc_label_decode.character
self.only_gtc = only_gtc
self.with_ratio = with_ratio
def get_character_num(self):
return [len(self.gtc_character), len(self.ctc_character)]
def __call__(self, preds, batch=None, *args, **kwargs):
if self.with_ratio:
batch = batch[:-1]
gtc = self.gtc_label_decode(preds['gtc_pred'],
batch[:-2] if batch is not None else None)
if self.only_gtc:
return gtc
ctc = self.ctc_label_decode(preds['ctc_pred'], [None] +
batch[-2:] if batch is not None else None)
return [gtc, ctc]
|