从乱码的 PDF 中提取文本 [英] Extracting text from garbled PDF

问题描述

我有一个包含重要文本信息的 PDF 文件.

问题是我无法提取文本，我得到的只是一堆乱码.如果我将文本从 PDF 阅读器复制并粘贴到文本文件中，也会发生同样的情况.即使在 Acrobat Reader 中 File -> Save as text 也失败了.

我已经使用了所有可以使用的工具，结果都是一样的.我相信这与字体嵌入有关，但我不知道究竟是什么?

我的问题:

• 这种奇怪的文字乱码的罪魁祸首是什么?
• 如何从 PDF 中提取文本内容(以编程方式、使用工具、直接操作位等)?
• 如何修复 PDF 以免在复制时出现乱码?

解决方案

找了很多人求助，OCR是解决这个问题的唯一办法<​​/p>

I have a PDF file with valuable textual information.

The problem is that I cannot extract the text, all I get is a bunch of garbled symbols. The same happens if I copy and paste the text from the PDF reader to a text file. Even File -> Save as text in Acrobat Reader fails.

I have used all tools I could get my hands on and the result is the same. I believe that this has something to do with fonts embedding, but I don't know what exactly?

My questions:

• What is the culprit of this weird text garbling?
• How to extract the text content from the PDF (programmatically, with a tool, manipulating the bits directly, etc.)?
• How to fix the PDF to not garble on copy?

解决方案

I went to a lot of people for help and OCR is the only solution to this problem

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