MinerU / magic_pdf /pre_proc /detect_page_number.py
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from magic_pdf.libs.commons import fitz # pyMuPDF库
from magic_pdf.libs.coordinate_transform import get_scale_ratio
def parse_pageNos(page_ID: int, page: fitz.Page, json_from_DocXchain_obj: dict):
"""
:param page_ID: int类型,当前page在当前pdf文档中是第page_D页。
:param page :fitz读取的当前页的内容
:param res_dir_path: str类型,是每一个pdf文档,在当前.py文件的目录下生成一个与pdf文档同名的文件夹,res_dir_path就是文件夹的dir
:param json_from_DocXchain_obj: dict类型,把pdf文档送入DocXChain模型中后,提取bbox,结果保存到pdf文档同名文件夹下的 page_ID.json文件中了。json_from_DocXchain_obj就是打开后的dict
"""
#--------- 通过json_from_DocXchain来获取 pageNo ---------#
pageNo_bbox_from_DocXChain = []
xf_json = json_from_DocXchain_obj
horizontal_scale_ratio, vertical_scale_ratio = get_scale_ratio(xf_json, page)
# {0: 'title', # 标题
# 1: 'figure', # 图片
# 2: 'plain text', # 文本
# 3: 'header', # 页眉
# 4: 'page number', # 页码
# 5: 'footnote', # 脚注
# 6: 'footer', # 页脚
# 7: 'table', # 表格
# 8: 'table caption', # 表格描述
# 9: 'figure caption', # 图片描述
# 10: 'equation', # 公式
# 11: 'full column', # 单栏
# 12: 'sub column', # 多栏
# 13: 'embedding', # 嵌入公式
# 14: 'isolated'} # 单行公式
for xf in xf_json['layout_dets']:
L = xf['poly'][0] / horizontal_scale_ratio
U = xf['poly'][1] / vertical_scale_ratio
R = xf['poly'][2] / horizontal_scale_ratio
D = xf['poly'][5] / vertical_scale_ratio
# L += pageL # 有的页面,artBox偏移了。不在(0,0)
# R += pageL
# U += pageU
# D += pageU
L, R = min(L, R), max(L, R)
U, D = min(U, D), max(U, D)
if xf['category_id'] == 4 and xf['score'] >= 0.3:
pageNo_bbox_from_DocXChain.append((L, U, R, D))
pageNo_final_names = []
pageNo_final_bboxs = []
pageNo_ID = 0
for L, U, R, D in pageNo_bbox_from_DocXChain:
# cur_pageNo = page.get_pixmap(clip=(L,U,R,D))
new_pageNo_name = "pageNo_{}_{}.png".format(page_ID, pageNo_ID) # 页码name
# cur_pageNo.save(res_dir_path + '/' + new_pageNo_name) # 把页码存储在新建的文件夹,并命名
pageNo_final_names.append(new_pageNo_name) # 把页码的名字存在list中
pageNo_final_bboxs.append((L, U, R, D))
pageNo_ID += 1
pageNo_final_bboxs.sort(key = lambda LURD: (LURD[1], LURD[0]))
curPage_all_pageNo_bboxs = pageNo_final_bboxs
return curPage_all_pageNo_bboxs