fix: Title text partially missing issue in recovery_to_markdown.py

[Coobiw]

when I run the quicktour code as following:

import os
import cv2
from PIL import Image
from pathlib import Path
from paddleocr import PPStructure,save_structure_res, draw_structure_result
from paddleocr.ppstructure.recovery.recovery_to_doc import sorted_layout_boxes
from paddleocr.ppstructure.recovery.recovery_to_markdown import convert_info_markdown

# 中文测试图
# table_engine = PPStructure(recovery=True)
# 英文测试图
table_engine = PPStructure(recovery=True, lang='en')

save_folder = './paddleocr_markdown_restore_new'
img_path = './pics/20241113-091849.jpeg'
img = cv2.imread(img_path)
result = table_engine(img)
save_structure_res(result, save_folder, os.path.basename(img_path).split('.')[0])

for line in result:
    # line.pop('img')
    print(line)

im_show = draw_structure_result(img, result, font_path='/cpfs/data/user/zhiqi/mm_ocr/got/fonts/simfang.ttf')
im_show = Image.fromarray(im_show)
im_show.save(f'{save_folder}/{Path(img_path).stem}_vis_paddle.jpg')
h, w, _ = img.shape
res = sorted_layout_boxes(result, w)
convert_info_markdown(res, save_folder, os.path.basename(img_path).split('.')[0])

I find that the output markdown file has some minor mistakes on the title texts. I will show the result.

test pdf screenshot:

part of original recovered markdown:

# 3

# 3.1
...

# 3.1.1
...

The title texts are incomplete. I find that the source code only append the first part of detected title text:

elif region["type"].lower() == "title":
            markdown_string.append(f"""# {region["res"][0]["text"]}""")

So I modify recovery_to_markdown.py. After that, the title text is complete, as following:

# 3 Contribucion de la JERS al marco de politicas

# 3.1 Sector bancario
...

# 3.1.1 Dictamenes relativos al articulo 458 del R eglamento sobre Requisitos de Capital
...

[CLAassistant]

All committers have signed the CLA.

[GreatV]

please fix codestyle and sign the CLA.

[Coobiw]

Hi! @GreatV Those are done. Looking forward to your review. Thanks!

[GreatV]

Is it possible for region["res"] to contain only one element, and could this lead to potential out-of-bounds issues?