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@@ -9,7 +9,7 @@ from magic_pdf.libs.ocr_content_type import ContentType
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LINE_STOP_FLAG = ['.', '!', '?', '。', '!', '?',":", ":", ")", ")", ";"]
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INLINE_EQUATION = ContentType.InlineEquation
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INTERLINE_EQUATION = ContentType.InterlineEquation
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-TEXT = "text"
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+TEXT = ContentType.Text
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def __get_span_text(span):
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@@ -20,7 +20,7 @@ def __get_span_text(span):
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return c
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-def __detect_list_lines(lines, new_layout_bboxes, lang='en'):
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+def __detect_list_lines(lines, new_layout_bboxes, lang):
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"""
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探测是否包含了列表,并且把列表的行分开.
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这样的段落特点是,顶格字母大写/数字,紧跟着几行缩进的。缩进的行首字母含小写的。
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@@ -315,11 +315,14 @@ def __split_para_in_layoutbox(lines_group, new_layout_bbox, lang="en", char_avg_
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return layout_paras, list_info
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-def __connect_list_inter_layout(layout_paras, new_layout_bbox, layout_list_info, page_num, lang="en"):
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+def __connect_list_inter_layout(layout_paras, new_layout_bbox, layout_list_info, page_num, lang):
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"""
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- 如果上个layout的最后一个段落是列表,下一个layout的第一个段落也是列表,那么将他们连接起来。
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+ 如果上个layout的最后一个段落是列表,下一个layout的第一个段落也是列表,那么将他们连接起来。 TODO 因为没有区分列表和段落,所以这个方法暂时不实现。
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根据layout_list_info判断是不是列表。,下个layout的第一个段如果不是列表,那么看他们是否有几行都有相同的缩进。
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"""
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+ if len(layout_paras)==0 or len(layout_list_info)==0: # 0的时候最后的return 会出错
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+ return layout_paras, [False, False]
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+
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for i in range(1, len(layout_paras)):
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pre_layout_list_info = layout_list_info[i-1]
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next_layout_list_info = layout_list_info[i]
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@@ -345,7 +348,37 @@ def __connect_list_inter_layout(layout_paras, new_layout_bbox, layout_list_info,
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pre_last_para.extend(may_list_lines)
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layout_paras[i] = layout_paras[i][len(may_list_lines):]
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- return layout_paras
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+ return layout_paras, [layout_list_info[0][0], layout_list_info[-1][1]] # 同时还返回了这个页面级别的开头、结尾是不是列表的信息
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+
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+
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+def __connect_list_inter_page(pre_page_paras, next_page_paras, pre_page_layout_bbox, next_page_layout_bbox, pre_page_list_info, next_page_list_info, page_num, lang):
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+ """
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+ 如果上个layout的最后一个段落是列表,下一个layout的第一个段落也是列表,那么将他们连接起来。 TODO 因为没有区分列表和段落,所以这个方法暂时不实现。
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+ 根据layout_list_info判断是不是列表。,下个layout的第一个段如果不是列表,那么看他们是否有几行都有相同的缩进。
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+ """
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+ if len(pre_page_paras)==0 or len(next_page_paras)==0: # 0的时候最后的return 会出错
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+ return False
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+
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+ if pre_page_list_info[1] and not next_page_list_info[0]: # 前一个是列表结尾,后一个是非列表开头,此时检测是否有相同的缩进
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+ logger.info(f"连接page {page_num} 内的list")
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+ # 向layout_paras[i] 寻找开头具有相同缩进的连续的行
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+ may_list_lines = []
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+ for j in range(len(next_page_paras[0])):
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+ line = next_page_paras[0][j]
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+ if len(line)==1: # 只可能是一行,多行情况再需要分析了
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+ if line[0]['bbox'][0] > __find_layout_bbox_by_line(line[0]['bbox'], next_page_layout_bbox)[0]:
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+ may_list_lines.append(line[0])
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+ else:
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+ break
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+ else:
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+ break
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+ # 如果这些行的缩进是相等的,那么连到上一个layout的最后一个段落上。
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+ if len(may_list_lines)>0 and len(set([x['bbox'][0] for x in may_list_lines]))==1:
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+ pre_page_paras[-1].append(may_list_lines)
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+ next_page_paras[0] = next_page_paras[0][len(may_list_lines):]
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+ return True
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+
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+ return False
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def __find_layout_bbox_by_line(line_bbox, layout_bboxes):
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@@ -358,7 +391,7 @@ def __find_layout_bbox_by_line(line_bbox, layout_bboxes):
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return None
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-def __connect_para_inter_layoutbox(layout_paras, new_layout_bbox, lang="en"):
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+def __connect_para_inter_layoutbox(layout_paras, new_layout_bbox, lang):
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"""
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layout之间进行分段。
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主要是计算前一个layOut的最后一行和后一个layout的第一行是否可以连接。
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@@ -368,10 +401,19 @@ def __connect_para_inter_layoutbox(layout_paras, new_layout_bbox, lang="en"):
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"""
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connected_layout_paras = []
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+ if len(layout_paras)==0:
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+ return connected_layout_paras
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+
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connected_layout_paras.append(layout_paras[0])
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for i in range(1, len(layout_paras)):
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- pre_last_line = layout_paras[i-1][-1][-1]
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- next_first_line = layout_paras[i][0][0]
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+ try:
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+ if len(layout_paras[i])==0 or len(layout_paras[i-1])==0: # TODO 考虑连接问题,
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+ continue
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+ pre_last_line = layout_paras[i-1][-1][-1]
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+ next_first_line = layout_paras[i][0][0]
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+ except Exception as e:
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+ logger.error(f"page layout {i} has no line")
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+ continue
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pre_last_line_text = ''.join([__get_span_text(span) for span in pre_last_line['spans']])
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pre_last_line_type = pre_last_line['spans'][-1]['type']
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next_first_line_text = ''.join([__get_span_text(span) for span in next_first_line['spans']])
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@@ -400,7 +442,7 @@ def __connect_para_inter_layoutbox(layout_paras, new_layout_bbox, lang="en"):
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return connected_layout_paras
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-def __connect_para_inter_page(pre_page_paras, next_page_paras, pre_page_layout_bbox, next_page_layout_bbox, lang):
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+def __connect_para_inter_page(pre_page_paras, next_page_paras, pre_page_layout_bbox, next_page_layout_bbox, page_num, lang):
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"""
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连接起来相邻两个页面的段落——前一个页面最后一个段落和后一个页面的第一个段落。
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是否可以连接的条件:
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@@ -408,7 +450,7 @@ def __connect_para_inter_page(pre_page_paras, next_page_paras, pre_page_layout_b
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2. 后一个页面的第一个段落第一行没有空白开头。
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"""
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# 有的页面可能压根没有文字
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- if len(pre_page_paras)==0 or len(next_page_paras)==0:
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+ if len(pre_page_paras)==0 or len(next_page_paras)==0 or len(pre_page_paras[0])==0 or len(next_page_paras[0])==0: # TODO [[]]为什么出现在pre_page_paras里?
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return False
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pre_last_para = pre_page_paras[-1][-1]
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next_first_para = next_page_paras[0][0]
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@@ -436,8 +478,85 @@ def __connect_para_inter_page(pre_page_paras, next_page_paras, pre_page_layout_b
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else:
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return False
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+def find_consecutive_true_regions(input_array):
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+ start_index = None # 连续True区域的起始索引
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+ regions = [] # 用于保存所有连续True区域的起始和结束索引
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+
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+ for i in range(len(input_array)):
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+ # 如果我们找到了一个True值,并且当前并没有在连续True区域中
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+ if input_array[i] and start_index is None:
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+ start_index = i # 记录连续True区域的起始索引
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-def __do_split(blocks, layout_bboxes, new_layout_bbox, page_num, lang="en"):
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+ # 如果我们找到了一个False值,并且当前在连续True区域中
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+ elif not input_array[i] and start_index is not None:
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+ # 如果连续True区域长度大于1,那么将其添加到结果列表中
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+ if i - start_index > 1:
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+ regions.append((start_index, i-1))
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+ start_index = None # 重置起始索引
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+
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+ # 如果最后一个元素是True,那么需要将最后一个连续True区域加入到结果列表中
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+ if start_index is not None and len(input_array) - start_index > 1:
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+ regions.append((start_index, len(input_array)-1))
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+
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+ return regions
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+
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+
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+def __connect_middle_align_text(page_paras, new_layout_bbox, page_num, lang, debug_mode):
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+ """
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+ 找出来中间对齐的连续单行文本,如果连续行高度相同,那么合并为一个段落。
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+ 一个line居中的条件是:
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+ 1. 水平中心点跨越layout的中心点。
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+ 2. 左右两侧都有空白
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+ """
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+
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+ for layout_i, layout_para in enumerate(page_paras):
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+ layout_box = new_layout_bbox[layout_i]
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+ single_line_paras_tag = []
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+ for i in range(len(layout_para)):
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+ single_line_paras_tag.append(len(layout_para[i])==1 and layout_para[i][0]['spans'][0]['type']==TEXT)
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+
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+ """找出来连续的单行文本,如果连续行高度相同,那么合并为一个段落。"""
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+ consecutive_single_line_indices = find_consecutive_true_regions(single_line_paras_tag)
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+ if len(consecutive_single_line_indices)>0:
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+ index_offset = 0
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+ """检查这些行是否是高度相同的,居中的"""
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+ for start, end in consecutive_single_line_indices:
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+ start += index_offset
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+ end += index_offset
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+ line_hi = np.array([line[0]['bbox'][3]-line[0]['bbox'][1] for line in layout_para[start:end+1]])
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+ first_line_text = ''.join([__get_span_text(span) for span in layout_para[start][0]['spans']])
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+ if "Table" in first_line_text or "Figure" in first_line_text:
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+ pass
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+ if debug_mode:
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+ logger.info(line_hi.std())
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+
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+ if line_hi.std()<2:
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+ """行高度相同,那么判断是否居中"""
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+ all_left_x0 = [line[0]['bbox'][0] for line in layout_para[start:end+1]]
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+ all_right_x1 = [line[0]['bbox'][2] for line in layout_para[start:end+1]]
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+ layout_center = (layout_box[0] + layout_box[2]) / 2
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+ if all([x0 < layout_center < x1 for x0, x1 in zip(all_left_x0, all_right_x1)]) \
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+ and not all([x0==layout_box[0] for x0 in all_left_x0]) \
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+ and not all([x1==layout_box[2] for x1 in all_right_x1]):
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+ merge_para = [l[0] for l in layout_para[start:end+1]]
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+ para_text = ''.join([__get_span_text(span) for line in merge_para for span in line['spans']])
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+ if debug_mode:
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+ logger.info(para_text)
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+ layout_para[start:end+1] = [merge_para]
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+ index_offset -= end-start
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+
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+ return
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+
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+
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+def __merge_signle_list_text(page_paras, new_layout_bbox, page_num, lang):
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+ """
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+ 找出来连续的单行文本,如果首行顶格,接下来的几个单行段落缩进对齐,那么合并为一个段落。
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+ """
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+
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+ pass
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+
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+
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+def __do_split_page(blocks, layout_bboxes, new_layout_bbox, page_num, lang):
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"""
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根据line和layout情况进行分段
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先实现一个根据行末尾特征分段的简单方法。
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@@ -451,35 +570,54 @@ def __do_split(blocks, layout_bboxes, new_layout_bbox, page_num, lang="en"):
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"""
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lines_group = __group_line_by_layout(blocks, layout_bboxes, lang) # block内分段
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layout_paras, layout_list_info = __split_para_in_layoutbox(lines_group, new_layout_bbox, lang) # layout内分段
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- layout_paras2 = __connect_list_inter_layout(layout_paras, new_layout_bbox, layout_list_info, page_num, lang) # layout之间连接列表段落
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+ layout_paras2, page_list_info = __connect_list_inter_layout(layout_paras, new_layout_bbox, layout_list_info, page_num, lang) # layout之间连接列表段落
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connected_layout_paras = __connect_para_inter_layoutbox(layout_paras2, new_layout_bbox, lang) # layout间链接段落
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- return connected_layout_paras
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-
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-def para_split(pdf_info_dict, lang="en"):
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+ return connected_layout_paras, page_list_info
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+
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+
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+def para_split(pdf_info_dict, debug_mode, lang="en"):
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"""
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根据line和layout情况进行分段
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"""
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new_layout_of_pages = [] # 数组的数组,每个元素是一个页面的layoutS
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+ all_page_list_info = [] # 保存每个页面开头和结尾是否是列表
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for page_num, page in pdf_info_dict.items():
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blocks = page['preproc_blocks']
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layout_bboxes = page['layout_bboxes']
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new_layout_bbox = __common_pre_proc(blocks, layout_bboxes)
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new_layout_of_pages.append(new_layout_bbox)
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- splited_blocks = __do_split(blocks, layout_bboxes, new_layout_bbox, page_num, lang)
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+ splited_blocks, page_list_info = __do_split_page(blocks, layout_bboxes, new_layout_bbox, page_num, lang)
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+ all_page_list_info.append(page_list_info)
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page['para_blocks'] = splited_blocks
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"""连接页面与页面之间的可能合并的段落"""
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pdf_infos = list(pdf_info_dict.values())
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- for i, page in enumerate(pdf_info_dict.values()):
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- if i==0:
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+ for page_num, page in enumerate(pdf_info_dict.values()):
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+ if page_num==0:
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continue
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- pre_page_paras = pdf_infos[i-1]['para_blocks']
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- next_page_paras = pdf_infos[i]['para_blocks']
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- pre_page_layout_bbox = new_layout_of_pages[i-1]
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- next_page_layout_bbox = new_layout_of_pages[i]
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+ pre_page_paras = pdf_infos[page_num-1]['para_blocks']
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+ next_page_paras = pdf_infos[page_num]['para_blocks']
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+ pre_page_layout_bbox = new_layout_of_pages[page_num-1]
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+ next_page_layout_bbox = new_layout_of_pages[page_num]
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- is_conn= __connect_para_inter_page(pre_page_paras, next_page_paras, pre_page_layout_bbox, next_page_layout_bbox, lang)
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- if is_conn:
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- logger.info(f"连接了第{i-1}页和第{i}页的段落")
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+ is_conn = __connect_para_inter_page(pre_page_paras, next_page_paras, pre_page_layout_bbox, next_page_layout_bbox, page_num, lang)
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+ if debug_mode:
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+ if is_conn:
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+ logger.info(f"连接了第{page_num-1}页和第{page_num}页的段落")
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+
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+ is_list_conn = __connect_list_inter_page(pre_page_paras, next_page_paras, pre_page_layout_bbox, next_page_layout_bbox, all_page_list_info[page_num-1], all_page_list_info[page_num], page_num, lang)
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+ if debug_mode:
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+ if is_list_conn:
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+ logger.info(f"连接了第{page_num-1}页和第{page_num}页的列表段落")
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+
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+ """接下来可能会漏掉一些特别的一些可以合并的内容,对他们进行段落连接
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+ 1. 正文中有时出现一个行顶格,接下来几行缩进的情况。
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+ 2. 居中的一些连续单行,如果高度相同,那么可能是一个段落。
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+ """
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+ for page_num, page in enumerate(pdf_info_dict.values()):
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+ page_paras = page['para_blocks']
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+ new_layout_bbox = new_layout_of_pages[page_num]
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+ __connect_middle_align_text(page_paras, new_layout_bbox, page_num, lang, debug_mode=debug_mode)
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+ __merge_signle_list_text(page_paras, new_layout_bbox, page_num, lang)
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