789 lines
30 KiB
Python
789 lines
30 KiB
Python
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# copyright (c) 2020 PaddlePaddle Authors. All Rights Reserve.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import re
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import numpy as np
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import torch
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class BaseRecLabelDecode(object):
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""" Convert between text-label and text-index """
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def __init__(self,
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character_dict_path=None,
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use_space_char=False):
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self.beg_str = "sos"
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self.end_str = "eos"
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self.reverse = False
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self.character_str = []
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if character_dict_path is None:
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self.character_str = "0123456789abcdefghijklmnopqrstuvwxyz"
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dict_character = list(self.character_str)
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else:
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with open(character_dict_path, "rb") as fin:
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lines = fin.readlines()
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for line in lines:
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line = line.decode('utf-8').strip("\n").strip("\r\n")
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self.character_str.append(line)
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if use_space_char:
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self.character_str.append(" ")
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dict_character = list(self.character_str)
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if "arabic" in character_dict_path:
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self.reverse = True
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dict_character = self.add_special_char(dict_character)
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self.dict = {}
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for i, char in enumerate(dict_character):
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self.dict[char] = i
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self.character = np.array(dict_character)
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def pred_reverse(self, pred):
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pred_re = []
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c_current = ""
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for c in pred:
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if not bool(re.search("[a-zA-Z0-9 :*./%+-]", c)):
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if c_current != "":
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pred_re.append(c_current)
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pred_re.append(c)
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c_current = ""
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else:
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c_current += c
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if c_current != "":
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pred_re.append(c_current)
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return "".join(pred_re[::-1])
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def add_special_char(self, dict_character):
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return dict_character
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def get_word_info(self, text, selection):
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"""
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Group the decoded characters and record the corresponding decoded positions.
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Args:
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text: the decoded text
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selection: the bool array that identifies which columns of features are decoded as non-separated characters
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Returns:
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word_list: list of the grouped words
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word_col_list: list of decoding positions corresponding to each character in the grouped word
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state_list: list of marker to identify the type of grouping words, including two types of grouping words:
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- 'cn': continuous chinese characters (e.g., 你好啊)
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- 'en&num': continuous english characters (e.g., hello), number (e.g., 123, 1.123), or mixed of them connected by '-' (e.g., VGG-16)
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The remaining characters in text are treated as separators between groups (e.g., space, '(', ')', etc.).
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"""
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state = None
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word_content = []
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word_col_content = []
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word_list = []
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word_col_list = []
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state_list = []
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valid_col = np.where(selection == True)[0]
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for c_i, char in enumerate(text):
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if "\u4e00" <= char <= "\u9fff":
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c_state = "cn"
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elif bool(re.search("[a-zA-Z0-9]", char)):
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c_state = "en&num"
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else:
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c_state = "splitter"
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if (
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char == "."
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and state == "en&num"
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and c_i + 1 < len(text)
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and bool(re.search("[0-9]", text[c_i + 1]))
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): # grouping floating number
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c_state = "en&num"
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if (
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char == "-" and state == "en&num"
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): # grouping word with '-', such as 'state-of-the-art'
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c_state = "en&num"
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if state == None:
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state = c_state
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if state != c_state:
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if len(word_content) != 0:
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word_list.append(word_content)
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word_col_list.append(word_col_content)
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state_list.append(state)
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word_content = []
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word_col_content = []
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state = c_state
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if state != "splitter":
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word_content.append(char)
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word_col_content.append(valid_col[c_i])
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if len(word_content) != 0:
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word_list.append(word_content)
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word_col_list.append(word_col_content)
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state_list.append(state)
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return word_list, word_col_list, state_list
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def decode(
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self,
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text_index,
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text_prob=None,
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is_remove_duplicate=False,
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return_word_box=False,
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):
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""" convert text-index into text-label. """
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result_list = []
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batch_size = text_index.shape[0]
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blank_word = self.get_ignored_tokens()[0]
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for batch_idx in range(batch_size):
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probs = None if text_prob is None else np.array(text_prob[batch_idx])
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sequence = text_index[batch_idx]
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final_mask = sequence != blank_word
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if is_remove_duplicate:
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duplicate_mask = np.insert(sequence[1:] != sequence[:-1], 0, True)
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final_mask &= duplicate_mask
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sequence = sequence[final_mask]
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probs = None if probs is None else probs[final_mask]
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text = "".join(self.character[sequence])
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if text_prob is not None and probs is not None and len(probs) > 0:
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mean_conf = np.mean(probs)
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else:
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# 如果没有提供概率或最终结果为空，则默认置信度为1.0
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mean_conf = 1.0
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result_list.append((text, mean_conf))
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return result_list
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def get_ignored_tokens(self):
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return [0] # for ctc blank
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class CTCLabelDecode(BaseRecLabelDecode):
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""" Convert between text-label and text-index """
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def __init__(self,
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character_dict_path=None,
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use_space_char=False,
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**kwargs):
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super(CTCLabelDecode, self).__init__(character_dict_path,
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use_space_char)
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def __call__(self, preds, label=None, return_word_box=False, *args, **kwargs):
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preds_prob, preds_idx = preds.max(axis=2)
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text = self.decode(
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preds_idx.cpu().numpy(),
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preds_prob.float().cpu().numpy(),
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is_remove_duplicate=True,
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return_word_box=return_word_box,
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)
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if return_word_box:
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for rec_idx, rec in enumerate(text):
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wh_ratio = kwargs["wh_ratio_list"][rec_idx]
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max_wh_ratio = kwargs["max_wh_ratio"]
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rec[2][0] = rec[2][0] * (wh_ratio / max_wh_ratio)
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if label is None:
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return text
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label = self.decode(label.cpu().numpy())
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return text, label
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def add_special_char(self, dict_character):
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dict_character = ['blank'] + dict_character
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return dict_character
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class NRTRLabelDecode(BaseRecLabelDecode):
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""" Convert between text-label and text-index """
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def __init__(self, character_dict_path=None, use_space_char=True, **kwargs):
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super(NRTRLabelDecode, self).__init__(character_dict_path,
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use_space_char)
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def __call__(self, preds, label=None, *args, **kwargs):
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if len(preds) == 2:
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preds_id = preds[0]
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preds_prob = preds[1]
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if isinstance(preds_id, torch.Tensor):
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preds_id = preds_id.numpy()
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if isinstance(preds_prob, torch.Tensor):
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preds_prob = preds_prob.numpy()
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if preds_id[0][0] == 2:
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preds_idx = preds_id[:, 1:]
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preds_prob = preds_prob[:, 1:]
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else:
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preds_idx = preds_id
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text = self.decode(preds_idx, preds_prob, is_remove_duplicate=False)
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if label is None:
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return text
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label = self.decode(label[:, 1:])
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else:
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if isinstance(preds, torch.Tensor):
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preds = preds.numpy()
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preds_idx = preds.argmax(axis=2)
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preds_prob = preds.max(axis=2)
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text = self.decode(preds_idx, preds_prob, is_remove_duplicate=False)
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if label is None:
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return text
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label = self.decode(label[:, 1:])
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return text, label
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def add_special_char(self, dict_character):
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dict_character = ['blank', '<unk>', '<s>', '</s>'] + dict_character
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return dict_character
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def decode(self, text_index, text_prob=None, is_remove_duplicate=False):
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""" convert text-index into text-label. """
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result_list = []
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batch_size = len(text_index)
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for batch_idx in range(batch_size):
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char_list = []
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conf_list = []
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for idx in range(len(text_index[batch_idx])):
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try:
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char_idx = self.character[int(text_index[batch_idx][idx])]
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except:
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continue
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if char_idx == '</s>': # end
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break
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char_list.append(char_idx)
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if text_prob is not None:
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conf_list.append(text_prob[batch_idx][idx])
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else:
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conf_list.append(1)
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text = ''.join(char_list)
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result_list.append((text.lower(), np.mean(conf_list).tolist()))
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return result_list
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class ViTSTRLabelDecode(NRTRLabelDecode):
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""" Convert between text-label and text-index """
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def __init__(self, character_dict_path=None, use_space_char=False,
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**kwargs):
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super(ViTSTRLabelDecode, self).__init__(character_dict_path,
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use_space_char)
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def __call__(self, preds, label=None, *args, **kwargs):
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if isinstance(preds, torch.Tensor):
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preds = preds[:, 1:].numpy()
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else:
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preds = preds[:, 1:]
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preds_idx = preds.argmax(axis=2)
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preds_prob = preds.max(axis=2)
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text = self.decode(preds_idx, preds_prob, is_remove_duplicate=False)
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if label is None:
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return text
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label = self.decode(label[:, 1:])
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return text, label
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def add_special_char(self, dict_character):
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dict_character = ['<s>', '</s>'] + dict_character
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return dict_character
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class AttnLabelDecode(BaseRecLabelDecode):
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""" Convert between text-label and text-index """
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def __init__(self,
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character_dict_path=None,
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use_space_char=False,
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**kwargs):
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super(AttnLabelDecode, self).__init__(character_dict_path,
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use_space_char)
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def add_special_char(self, dict_character):
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self.beg_str = "sos"
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self.end_str = "eos"
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dict_character = dict_character
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dict_character = [self.beg_str] + dict_character + [self.end_str]
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return dict_character
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def decode(self, text_index, text_prob=None, is_remove_duplicate=False):
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""" convert text-index into text-label. """
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result_list = []
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ignored_tokens = self.get_ignored_tokens()
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[beg_idx, end_idx] = self.get_ignored_tokens()
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batch_size = len(text_index)
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for batch_idx in range(batch_size):
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char_list = []
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conf_list = []
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for idx in range(len(text_index[batch_idx])):
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if text_index[batch_idx][idx] in ignored_tokens:
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continue
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if int(text_index[batch_idx][idx]) == int(end_idx):
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break
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if is_remove_duplicate:
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# only for predict
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if idx > 0 and text_index[batch_idx][idx - 1] == text_index[
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batch_idx][idx]:
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continue
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char_list.append(self.character[int(text_index[batch_idx][
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idx])])
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if text_prob is not None:
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conf_list.append(text_prob[batch_idx][idx])
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else:
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conf_list.append(1)
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text = ''.join(char_list)
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result_list.append((text, np.mean(conf_list)))
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return result_list
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def __call__(self, preds, label=None, *args, **kwargs):
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"""
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text = self.decode(text)
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if label is None:
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return text
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else:
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|
|
label = self.decode(label, is_remove_duplicate=False)
|
|||
|
|
return text, label
|
|||
|
|
"""
|
|||
|
|
if isinstance(preds, torch.Tensor):
|
|||
|
|
preds = preds.cpu().numpy()
|
|||
|
|
|
|||
|
|
preds_idx = preds.argmax(axis=2)
|
|||
|
|
preds_prob = preds.max(axis=2)
|
|||
|
|
text = self.decode(preds_idx, preds_prob, is_remove_duplicate=False)
|
|||
|
|
if label is None:
|
|||
|
|
return text
|
|||
|
|
label = self.decode(label, is_remove_duplicate=False)
|
|||
|
|
return text, label
|
|||
|
|
|
|||
|
|
def get_ignored_tokens(self):
|
|||
|
|
beg_idx = self.get_beg_end_flag_idx("beg")
|
|||
|
|
end_idx = self.get_beg_end_flag_idx("end")
|
|||
|
|
return [beg_idx, end_idx]
|
|||
|
|
|
|||
|
|
def get_beg_end_flag_idx(self, beg_or_end):
|
|||
|
|
if beg_or_end == "beg":
|
|||
|
|
idx = np.array(self.dict[self.beg_str])
|
|||
|
|
elif beg_or_end == "end":
|
|||
|
|
idx = np.array(self.dict[self.end_str])
|
|||
|
|
else:
|
|||
|
|
assert False, "unsupport type %s in get_beg_end_flag_idx" \
|
|||
|
|
% beg_or_end
|
|||
|
|
return idx
|
|||
|
|
|
|||
|
|
|
|||
|
|
class RFLLabelDecode(BaseRecLabelDecode):
|
|||
|
|
""" Convert between text-label and text-index """
|
|||
|
|
|
|||
|
|
def __init__(self, character_dict_path=None, use_space_char=False,
|
|||
|
|
**kwargs):
|
|||
|
|
super(RFLLabelDecode, self).__init__(character_dict_path,
|
|||
|
|
use_space_char)
|
|||
|
|
|
|||
|
|
def add_special_char(self, dict_character):
|
|||
|
|
self.beg_str = "sos"
|
|||
|
|
self.end_str = "eos"
|
|||
|
|
dict_character = dict_character
|
|||
|
|
dict_character = [self.beg_str] + dict_character + [self.end_str]
|
|||
|
|
return dict_character
|
|||
|
|
|
|||
|
|
def decode(self, text_index, text_prob=None, is_remove_duplicate=False):
|
|||
|
|
""" convert text-index into text-label. """
|
|||
|
|
result_list = []
|
|||
|
|
ignored_tokens = self.get_ignored_tokens()
|
|||
|
|
[beg_idx, end_idx] = self.get_ignored_tokens()
|
|||
|
|
batch_size = len(text_index)
|
|||
|
|
for batch_idx in range(batch_size):
|
|||
|
|
char_list = []
|
|||
|
|
conf_list = []
|
|||
|
|
for idx in range(len(text_index[batch_idx])):
|
|||
|
|
if text_index[batch_idx][idx] in ignored_tokens:
|
|||
|
|
continue
|
|||
|
|
if int(text_index[batch_idx][idx]) == int(end_idx):
|
|||
|
|
break
|
|||
|
|
if is_remove_duplicate:
|
|||
|
|
# only for predict
|
|||
|
|
if idx > 0 and text_index[batch_idx][idx - 1] == text_index[
|
|||
|
|
batch_idx][idx]:
|
|||
|
|
continue
|
|||
|
|
char_list.append(self.character[int(text_index[batch_idx][
|
|||
|
|
idx])])
|
|||
|
|
if text_prob is not None:
|
|||
|
|
conf_list.append(text_prob[batch_idx][idx])
|
|||
|
|
else:
|
|||
|
|
conf_list.append(1)
|
|||
|
|
text = ''.join(char_list)
|
|||
|
|
result_list.append((text, np.mean(conf_list).tolist()))
|
|||
|
|
return result_list
|
|||
|
|
|
|||
|
|
def __call__(self, preds, label=None, *args, **kwargs):
|
|||
|
|
# if seq_outputs is not None:
|
|||
|
|
if isinstance(preds, tuple) or isinstance(preds, list):
|
|||
|
|
cnt_outputs, seq_outputs = preds
|
|||
|
|
if isinstance(seq_outputs, torch.Tensor):
|
|||
|
|
seq_outputs = seq_outputs.numpy()
|
|||
|
|
preds_idx = seq_outputs.argmax(axis=2)
|
|||
|
|
preds_prob = seq_outputs.max(axis=2)
|
|||
|
|
text = self.decode(preds_idx, preds_prob, is_remove_duplicate=False)
|
|||
|
|
|
|||
|
|
if label is None:
|
|||
|
|
return text
|
|||
|
|
label = self.decode(label, is_remove_duplicate=False)
|
|||
|
|
return text, label
|
|||
|
|
|
|||
|
|
else:
|
|||
|
|
cnt_outputs = preds
|
|||
|
|
if isinstance(cnt_outputs, torch.Tensor):
|
|||
|
|
cnt_outputs = cnt_outputs.numpy()
|
|||
|
|
cnt_length = []
|
|||
|
|
for lens in cnt_outputs:
|
|||
|
|
length = round(np.sum(lens))
|
|||
|
|
cnt_length.append(length)
|
|||
|
|
if label is None:
|
|||
|
|
return cnt_length
|
|||
|
|
label = self.decode(label, is_remove_duplicate=False)
|
|||
|
|
length = [len(res[0]) for res in label]
|
|||
|
|
return cnt_length, length
|
|||
|
|
|
|||
|
|
def get_ignored_tokens(self):
|
|||
|
|
beg_idx = self.get_beg_end_flag_idx("beg")
|
|||
|
|
end_idx = self.get_beg_end_flag_idx("end")
|
|||
|
|
return [beg_idx, end_idx]
|
|||
|
|
|
|||
|
|
def get_beg_end_flag_idx(self, beg_or_end):
|
|||
|
|
if beg_or_end == "beg":
|
|||
|
|
idx = np.array(self.dict[self.beg_str])
|
|||
|
|
elif beg_or_end == "end":
|
|||
|
|
idx = np.array(self.dict[self.end_str])
|
|||
|
|
else:
|
|||
|
|
assert False, "unsupport type %s in get_beg_end_flag_idx" \
|
|||
|
|
% beg_or_end
|
|||
|
|
return idx
|
|||
|
|
|
|||
|
|
|
|||
|
|
class SRNLabelDecode(BaseRecLabelDecode):
|
|||
|
|
""" Convert between text-label and text-index """
|
|||
|
|
|
|||
|
|
def __init__(self,
|
|||
|
|
character_dict_path=None,
|
|||
|
|
use_space_char=False,
|
|||
|
|
**kwargs):
|
|||
|
|
self.max_text_length = kwargs.get('max_text_length', 25)
|
|||
|
|
super(SRNLabelDecode, self).__init__(character_dict_path,
|
|||
|
|
use_space_char)
|
|||
|
|
|
|||
|
|
def __call__(self, preds, label=None, *args, **kwargs):
|
|||
|
|
pred = preds['predict']
|
|||
|
|
char_num = len(self.character_str) + 2
|
|||
|
|
if isinstance(pred, torch.Tensor):
|
|||
|
|
pred = pred.numpy()
|
|||
|
|
pred = np.reshape(pred, [-1, char_num])
|
|||
|
|
|
|||
|
|
preds_idx = np.argmax(pred, axis=1)
|
|||
|
|
preds_prob = np.max(pred, axis=1)
|
|||
|
|
|
|||
|
|
preds_idx = np.reshape(preds_idx, [-1, self.max_text_length])
|
|||
|
|
|
|||
|
|
preds_prob = np.reshape(preds_prob, [-1, self.max_text_length])
|
|||
|
|
|
|||
|
|
text = self.decode(preds_idx, preds_prob)
|
|||
|
|
|
|||
|
|
if label is None:
|
|||
|
|
text = self.decode(preds_idx, preds_prob, is_remove_duplicate=False)
|
|||
|
|
return text
|
|||
|
|
label = self.decode(label)
|
|||
|
|
return text, label
|
|||
|
|
|
|||
|
|
def decode(self, text_index, text_prob=None, is_remove_duplicate=False):
|
|||
|
|
""" convert text-index into text-label. """
|
|||
|
|
result_list = []
|
|||
|
|
ignored_tokens = self.get_ignored_tokens()
|
|||
|
|
batch_size = len(text_index)
|
|||
|
|
|
|||
|
|
for batch_idx in range(batch_size):
|
|||
|
|
char_list = []
|
|||
|
|
conf_list = []
|
|||
|
|
for idx in range(len(text_index[batch_idx])):
|
|||
|
|
if text_index[batch_idx][idx] in ignored_tokens:
|
|||
|
|
continue
|
|||
|
|
if is_remove_duplicate:
|
|||
|
|
# only for predict
|
|||
|
|
if idx > 0 and text_index[batch_idx][idx - 1] == text_index[
|
|||
|
|
batch_idx][idx]:
|
|||
|
|
continue
|
|||
|
|
char_list.append(self.character[int(text_index[batch_idx][
|
|||
|
|
idx])])
|
|||
|
|
if text_prob is not None:
|
|||
|
|
conf_list.append(text_prob[batch_idx][idx])
|
|||
|
|
else:
|
|||
|
|
conf_list.append(1)
|
|||
|
|
|
|||
|
|
text = ''.join(char_list)
|
|||
|
|
result_list.append((text, np.mean(conf_list)))
|
|||
|
|
return result_list
|
|||
|
|
|
|||
|
|
def add_special_char(self, dict_character):
|
|||
|
|
dict_character = dict_character + [self.beg_str, self.end_str]
|
|||
|
|
return dict_character
|
|||
|
|
|
|||
|
|
def get_ignored_tokens(self):
|
|||
|
|
beg_idx = self.get_beg_end_flag_idx("beg")
|
|||
|
|
end_idx = self.get_beg_end_flag_idx("end")
|
|||
|
|
return [beg_idx, end_idx]
|
|||
|
|
|
|||
|
|
def get_beg_end_flag_idx(self, beg_or_end):
|
|||
|
|
if beg_or_end == "beg":
|
|||
|
|
idx = np.array(self.dict[self.beg_str])
|
|||
|
|
elif beg_or_end == "end":
|
|||
|
|
idx = np.array(self.dict[self.end_str])
|
|||
|
|
else:
|
|||
|
|
assert False, "unsupport type %s in get_beg_end_flag_idx" \
|
|||
|
|
% beg_or_end
|
|||
|
|
return idx
|
|||
|
|
|
|||
|
|
|
|||
|
|
class TableLabelDecode(object):
|
|||
|
|
""" """
|
|||
|
|
|
|||
|
|
def __init__(self,
|
|||
|
|
character_dict_path,
|
|||
|
|
**kwargs):
|
|||
|
|
list_character, list_elem = self.load_char_elem_dict(character_dict_path)
|
|||
|
|
list_character = self.add_special_char(list_character)
|
|||
|
|
list_elem = self.add_special_char(list_elem)
|
|||
|
|
self.dict_character = {}
|
|||
|
|
self.dict_idx_character = {}
|
|||
|
|
for i, char in enumerate(list_character):
|
|||
|
|
self.dict_idx_character[i] = char
|
|||
|
|
self.dict_character[char] = i
|
|||
|
|
self.dict_elem = {}
|
|||
|
|
self.dict_idx_elem = {}
|
|||
|
|
for i, elem in enumerate(list_elem):
|
|||
|
|
self.dict_idx_elem[i] = elem
|
|||
|
|
self.dict_elem[elem] = i
|
|||
|
|
|
|||
|
|
def load_char_elem_dict(self, character_dict_path):
|
|||
|
|
list_character = []
|
|||
|
|
list_elem = []
|
|||
|
|
with open(character_dict_path, "rb") as fin:
|
|||
|
|
lines = fin.readlines()
|
|||
|
|
substr = lines[0].decode('utf-8').strip("\n").strip("\r\n").split("\t")
|
|||
|
|
character_num = int(substr[0])
|
|||
|
|
elem_num = int(substr[1])
|
|||
|
|
for cno in range(1, 1 + character_num):
|
|||
|
|
character = lines[cno].decode('utf-8').strip("\n").strip("\r\n")
|
|||
|
|
list_character.append(character)
|
|||
|
|
for eno in range(1 + character_num, 1 + character_num + elem_num):
|
|||
|
|
elem = lines[eno].decode('utf-8').strip("\n").strip("\r\n")
|
|||
|
|
list_elem.append(elem)
|
|||
|
|
return list_character, list_elem
|
|||
|
|
|
|||
|
|
def add_special_char(self, list_character):
|
|||
|
|
self.beg_str = "sos"
|
|||
|
|
self.end_str = "eos"
|
|||
|
|
list_character = [self.beg_str] + list_character + [self.end_str]
|
|||
|
|
return list_character
|
|||
|
|
|
|||
|
|
def __call__(self, preds):
|
|||
|
|
structure_probs = preds['structure_probs']
|
|||
|
|
loc_preds = preds['loc_preds']
|
|||
|
|
if isinstance(structure_probs,torch.Tensor):
|
|||
|
|
structure_probs = structure_probs.numpy()
|
|||
|
|
if isinstance(loc_preds,torch.Tensor):
|
|||
|
|
loc_preds = loc_preds.numpy()
|
|||
|
|
structure_idx = structure_probs.argmax(axis=2)
|
|||
|
|
structure_probs = structure_probs.max(axis=2)
|
|||
|
|
structure_str, structure_pos, result_score_list, result_elem_idx_list = self.decode(structure_idx,
|
|||
|
|
structure_probs, 'elem')
|
|||
|
|
res_html_code_list = []
|
|||
|
|
res_loc_list = []
|
|||
|
|
batch_num = len(structure_str)
|
|||
|
|
for bno in range(batch_num):
|
|||
|
|
res_loc = []
|
|||
|
|
for sno in range(len(structure_str[bno])):
|
|||
|
|
text = structure_str[bno][sno]
|
|||
|
|
if text in ['<td>', '<td']:
|
|||
|
|
pos = structure_pos[bno][sno]
|
|||
|
|
res_loc.append(loc_preds[bno, pos])
|
|||
|
|
res_html_code = ''.join(structure_str[bno])
|
|||
|
|
res_loc = np.array(res_loc)
|
|||
|
|
res_html_code_list.append(res_html_code)
|
|||
|
|
res_loc_list.append(res_loc)
|
|||
|
|
return {'res_html_code': res_html_code_list, 'res_loc': res_loc_list, 'res_score_list': result_score_list,
|
|||
|
|
'res_elem_idx_list': result_elem_idx_list,'structure_str_list':structure_str}
|
|||
|
|
|
|||
|
|
def decode(self, text_index, structure_probs, char_or_elem):
|
|||
|
|
"""convert text-label into text-index.
|
|||
|
|
"""
|
|||
|
|
if char_or_elem == "char":
|
|||
|
|
current_dict = self.dict_idx_character
|
|||
|
|
else:
|
|||
|
|
current_dict = self.dict_idx_elem
|
|||
|
|
ignored_tokens = self.get_ignored_tokens('elem')
|
|||
|
|
beg_idx, end_idx = ignored_tokens
|
|||
|
|
|
|||
|
|
result_list = []
|
|||
|
|
result_pos_list = []
|
|||
|
|
result_score_list = []
|
|||
|
|
result_elem_idx_list = []
|
|||
|
|
batch_size = len(text_index)
|
|||
|
|
for batch_idx in range(batch_size):
|
|||
|
|
char_list = []
|
|||
|
|
elem_pos_list = []
|
|||
|
|
elem_idx_list = []
|
|||
|
|
score_list = []
|
|||
|
|
for idx in range(len(text_index[batch_idx])):
|
|||
|
|
tmp_elem_idx = int(text_index[batch_idx][idx])
|
|||
|
|
if idx > 0 and tmp_elem_idx == end_idx:
|
|||
|
|
break
|
|||
|
|
if tmp_elem_idx in ignored_tokens:
|
|||
|
|
continue
|
|||
|
|
|
|||
|
|
char_list.append(current_dict[tmp_elem_idx])
|
|||
|
|
elem_pos_list.append(idx)
|
|||
|
|
score_list.append(structure_probs[batch_idx, idx])
|
|||
|
|
elem_idx_list.append(tmp_elem_idx)
|
|||
|
|
result_list.append(char_list)
|
|||
|
|
result_pos_list.append(elem_pos_list)
|
|||
|
|
result_score_list.append(score_list)
|
|||
|
|
result_elem_idx_list.append(elem_idx_list)
|
|||
|
|
return result_list, result_pos_list, result_score_list, result_elem_idx_list
|
|||
|
|
|
|||
|
|
def get_ignored_tokens(self, char_or_elem):
|
|||
|
|
beg_idx = self.get_beg_end_flag_idx("beg", char_or_elem)
|
|||
|
|
end_idx = self.get_beg_end_flag_idx("end", char_or_elem)
|
|||
|
|
return [beg_idx, end_idx]
|
|||
|
|
|
|||
|
|
def get_beg_end_flag_idx(self, beg_or_end, char_or_elem):
|
|||
|
|
if char_or_elem == "char":
|
|||
|
|
if beg_or_end == "beg":
|
|||
|
|
idx = self.dict_character[self.beg_str]
|
|||
|
|
elif beg_or_end == "end":
|
|||
|
|
idx = self.dict_character[self.end_str]
|
|||
|
|
else:
|
|||
|
|
assert False, "Unsupport type %s in get_beg_end_flag_idx of char" \
|
|||
|
|
% beg_or_end
|
|||
|
|
elif char_or_elem == "elem":
|
|||
|
|
if beg_or_end == "beg":
|
|||
|
|
idx = self.dict_elem[self.beg_str]
|
|||
|
|
elif beg_or_end == "end":
|
|||
|
|
idx = self.dict_elem[self.end_str]
|
|||
|
|
else:
|
|||
|
|
assert False, "Unsupport type %s in get_beg_end_flag_idx of elem" \
|
|||
|
|
% beg_or_end
|
|||
|
|
else:
|
|||
|
|
assert False, "Unsupport type %s in char_or_elem" \
|
|||
|
|
% char_or_elem
|
|||
|
|
return idx
|
|||
|
|
|
|||
|
|
|
|||
|
|
class SARLabelDecode(BaseRecLabelDecode):
|
|||
|
|
""" Convert between text-label and text-index """
|
|||
|
|
|
|||
|
|
def __init__(self, character_dict_path=None, use_space_char=False,
|
|||
|
|
**kwargs):
|
|||
|
|
super(SARLabelDecode, self).__init__(character_dict_path,
|
|||
|
|
use_space_char)
|
|||
|
|
|
|||
|
|
self.rm_symbol = kwargs.get('rm_symbol', False)
|
|||
|
|
|
|||
|
|
def add_special_char(self, dict_character):
|
|||
|
|
beg_end_str = "<BOS/EOS>"
|
|||
|
|
unknown_str = "<UKN>"
|
|||
|
|
padding_str = "<PAD>"
|
|||
|
|
dict_character = dict_character + [unknown_str]
|
|||
|
|
self.unknown_idx = len(dict_character) - 1
|
|||
|
|
dict_character = dict_character + [beg_end_str]
|
|||
|
|
self.start_idx = len(dict_character) - 1
|
|||
|
|
self.end_idx = len(dict_character) - 1
|
|||
|
|
dict_character = dict_character + [padding_str]
|
|||
|
|
self.padding_idx = len(dict_character) - 1
|
|||
|
|
return dict_character
|
|||
|
|
|
|||
|
|
def decode(self, text_index, text_prob=None, is_remove_duplicate=False):
|
|||
|
|
""" convert text-index into text-label. """
|
|||
|
|
result_list = []
|
|||
|
|
ignored_tokens = self.get_ignored_tokens()
|
|||
|
|
|
|||
|
|
batch_size = len(text_index)
|
|||
|
|
for batch_idx in range(batch_size):
|
|||
|
|
char_list = []
|
|||
|
|
conf_list = []
|
|||
|
|
for idx in range(len(text_index[batch_idx])):
|
|||
|
|
if text_index[batch_idx][idx] in ignored_tokens:
|
|||
|
|
continue
|
|||
|
|
if int(text_index[batch_idx][idx]) == int(self.end_idx):
|
|||
|
|
if text_prob is None and idx == 0:
|
|||
|
|
continue
|
|||
|
|
else:
|
|||
|
|
break
|
|||
|
|
if is_remove_duplicate:
|
|||
|
|
# only for predict
|
|||
|
|
if idx > 0 and text_index[batch_idx][idx - 1] == text_index[
|
|||
|
|
batch_idx][idx]:
|
|||
|
|
continue
|
|||
|
|
char_list.append(self.character[int(text_index[batch_idx][
|
|||
|
|
idx])])
|
|||
|
|
if text_prob is not None:
|
|||
|
|
conf_list.append(text_prob[batch_idx][idx])
|
|||
|
|
else:
|
|||
|
|
conf_list.append(1)
|
|||
|
|
text = ''.join(char_list)
|
|||
|
|
if self.rm_symbol:
|
|||
|
|
comp = re.compile('[^A-Z^a-z^0-9^\u4e00-\u9fa5]')
|
|||
|
|
text = text.lower()
|
|||
|
|
text = comp.sub('', text)
|
|||
|
|
result_list.append((text, np.mean(conf_list).tolist()))
|
|||
|
|
return result_list
|
|||
|
|
|
|||
|
|
def __call__(self, preds, label=None, *args, **kwargs):
|
|||
|
|
if isinstance(preds, torch.Tensor):
|
|||
|
|
preds = preds.cpu().numpy()
|
|||
|
|
preds_idx = preds.argmax(axis=2)
|
|||
|
|
preds_prob = preds.max(axis=2)
|
|||
|
|
|
|||
|
|
text = self.decode(preds_idx, preds_prob, is_remove_duplicate=False)
|
|||
|
|
|
|||
|
|
if label is None:
|
|||
|
|
return text
|
|||
|
|
label = self.decode(label, is_remove_duplicate=False)
|
|||
|
|
return text, label
|
|||
|
|
|
|||
|
|
def get_ignored_tokens(self):
|
|||
|
|
return [self.padding_idx]
|
|||
|
|
|
|||
|
|
|
|||
|
|
class CANLabelDecode(BaseRecLabelDecode):
|
|||
|
|
""" Convert between latex-symbol and symbol-index """
|
|||
|
|
|
|||
|
|
def __init__(self, character_dict_path=None, use_space_char=False,
|
|||
|
|
**kwargs):
|
|||
|
|
super(CANLabelDecode, self).__init__(character_dict_path,
|
|||
|
|
use_space_char)
|
|||
|
|
|
|||
|
|
def decode(self, text_index, preds_prob=None):
|
|||
|
|
result_list = []
|
|||
|
|
batch_size = len(text_index)
|
|||
|
|
for batch_idx in range(batch_size):
|
|||
|
|
seq_end = text_index[batch_idx].argmin(0)
|
|||
|
|
idx_list = text_index[batch_idx][:seq_end].tolist()
|
|||
|
|
symbol_list = [self.character[idx] for idx in idx_list]
|
|||
|
|
probs = []
|
|||
|
|
if preds_prob is not None:
|
|||
|
|
probs = preds_prob[batch_idx][:len(symbol_list)].tolist()
|
|||
|
|
|
|||
|
|
result_list.append([' '.join(symbol_list), probs])
|
|||
|
|
return result_list
|
|||
|
|
|
|||
|
|
def __call__(self, preds, label=None, *args, **kwargs):
|
|||
|
|
pred_prob, _, _, _ = preds
|
|||
|
|
preds_idx = pred_prob.argmax(axis=2)
|
|||
|
|
|
|||
|
|
text = self.decode(preds_idx)
|
|||
|
|
if label is None:
|
|||
|
|
return text
|
|||
|
|
label = self.decode(label)
|
|||
|
|
return text, label
|