Header recognition is incomplete,table with border in pdf

[stevenwu2017]

I had a problem with incomplete header recognition, table with border in pdf.
but i don't know what causes it. pdf file and debug table find result as follows:

02498_ZH.pdf

python code:
import pdfplumber
pdf_files = '02498_ZH.pdf'
with pdfplumber.open(pdf_files) as pdf:
# 遍历每个页面
for idx, page in enumerate(pdf.pages):
# if idx==0:
deduped_page = page.dedupe_chars()
tables = page.find_tables()
for table in tables:
content=table.extract()
print(content)
sub_page=page.crop(table.bbox)
im = sub_page.to_image(resolution=200)
im.debug_tablefinder().show()

[jsvine]

It seems that there are two issues:

• Some "invisible" rectangles in the headers
• The text in the headers are represented as graphical elements (curves, some of which at 90° angles) in addition to font-rendered text

Filtering out those extra graphical elements seems to work:

def check(obj):
    # Keep only `chars` and objects with a black fill
    return obj.get("text") or obj.get("non_stroking_color") == (0, 0, 0)

page.filter(check).to_image().debug_tablefinder()

page.filter(check).extract_tables()

[[['名稱', '於上市時需禁\n售的股票數目', '於上市時需禁售的\n股票數目之百分比\n(假設沒行使超額\n配售權)', '禁售期最後一天'],
  ['廣祺瑞騰股權投資合夥企業(有\n限合夥)', '', '', ''],
  ['Excel Rise Holdings Limited\n/逸昇控股有限公司',
   '2,585,094',
   '0.58%',
   '2024年7月4 日'],
  ['Guangzhou Yuexiu Jinchan\nPhase IV\nInvestment Partnership\n(Limited Partnership) / 廣\n州越秀金蟬四期投資合夥企業\n(有限合夥)',
   '2,843,603',
   '0.63%',
   '2024年7月4 日'],
  ['Mirae Asset Alpha Growth\nFund OFC', '2,018,195', '0.45%', '2024年7月4 日'],
  ['Jurastone Tech Singularity\nI Ltd', '431,070', '0.10%', '2024年7月4 日'],
  ['HUITENG CO-STONE INVESTMENT\nLIMITED', '1,421,801', '0.32%', '2024年7月4 日'],
  ['China World Investment\nLimited', '568,720', '0.13%', '2024年7月4 日'],
  ['小計', '179,222,503', '39.90%', ''],
  ['以上的表格所示禁售期屆滿日期依據招股章程的信息披露。', None, None, None]],
 [['名稱', '於上市時需禁\n售的股票數目', '於上市時需禁售的股\n票數目之百分比(假設\n沒行使超額配售權)', '禁售期最後一天'],
  ['Shenzhen Nanshan Strategic\nEmerging Industries\nInvestment Co., Ltd. / 深圳\n市南山戰略新興產業 投資有限\n公司',
   '18,166,000',
   '4.04%',
   '2024年7月4 日'],
  ['小計', '18,166,000', '4.04%', ''],
  ['根據相關的上市規則/指引資料，禁售期最後一天於2024年7月4日 。', None, None, None]]]

[stevenwu2017]

OK,It's work. Thank you very much for your solution !!!