如何使用 python 代码查找 PDF 文件每一段的字体大小？

Question

现在我正在做一个项目，我必须在该项目中找到该 PDF 文件中每个段落的字体大小。我尝试了各种 python 库，例如 fitz、PyPDF2、pdfrw、pdfminer、pdfreader。所有库都获取文本数据，但我不知道如何获取段落的字体大小。提前致谢..感谢您的帮助。

我已经试过了，但无法获取字体大小。

import fitz

filepath = '/home/user/Downloads/abc.pdf'
text = ''
with fitz.open(filepath ) as doc:
    for page in doc:
        text+= page.getText()
print(text)

Answer 1

我从 pdfminer 得到了解决方案。 python 代码如下。

from pdfminer.high_level import extract_pages
from pdfminer.layout import LTTextContainer, LTChar,LTLine,LAParams
import os
path=r'/path/to/pdf'

Extract_Data=[]

for page_layout in extract_pages(path):
    for element in page_layout:
        if isinstance(element, LTTextContainer):
            for text_line in element:
                for character in text_line:
                    if isinstance(character, LTChar):
                        Font_size=character.size
            Extract_Data.append([Font_size,(element.get_text())])

Answer 2

更好的方法是使用 fitz 本身。与 pdfminer 相比，这个库在抓取字体信息方面明显更快更清晰。示例代码片段如下所示。

import fitz

def scrape(keyword, filePath):
    results = [] # list of tuples that store the information as (text, font size, font name) 
    pdf = fitz.open(filePath) # filePath is a string that contains the path to the pdf
    for page in pdf:
        dict = page.get_text("dict")
        blocks = dict["blocks"]
        for block in blocks:
            if "lines" in block.keys():
                spans = block['lines']
                for span in spans:
                    data = span['spans']
                    for lines in data:
                        if keyword in lines['text'].lower(): # only store font information of a specific keyword
                            results.append((lines['text'], lines['size'], lines['font']))
                            # lines['text'] -> string, lines['size'] -> font size, lines['font'] -> font name
    pdf.close()
    return results

如果要查找每一行的字体信息，可以省略检查特定关键字的if条件。[=15=]

您可以通过理解 structure of dictionary outputs that we obtain by using get_text("dict"), as mentioned in the documentation.

提取任何所需格式的文本信息

如何使用 python 代码查找 PDF 文件每一段的字体大小？

How to find the Font Size of every paragraph of PDF file using python code?

python

pdf

fonts

font-size