如何生成pdf文件中高光的摘要？

Question

We all know that we can highlight certain texts in a pdf file either using Adobe Acrobat or Preview on Mac. I'm wondering how I can extract all these highlights in a pdf file, and generate a summary (a note kind of thing).

The following post PDF: standard format for highlights? points out that there are multiple ways to do highlighting. Will it be a challenge to distinguish the original content of the file and the user-added highlights if shapes with transparency is used to achieve highlights?

Answer 1

可以在开源pdf解析-渲染库中找到有关此内容的详细信息，而您仅需阅读代码或文档（如果有）。