是指将PDF文档中的toUnicode cmap表还原为可读的Unicode字符编码。toUnicode cmap表是一种用于将PDF文档中的字符编码映射到Unicode字符的机制。通过还原toUnicode cmap表,可以实现对PDF文档中的字符进行正确的解码和显示。 PDF toUnicode cmap表还原的优势在于能够确保PDF文档中的字符能够正确地被解析和显示,避免出现乱码或...
“如果字体字典包含tounicode cmap”-f2没有tounicode cmap。“如果字体是简单字体”-f2不是简单字体。“...
输出如下所示:可以看到,有许多字符被转换为"(cid : number )“形式。进一步分析后,我发现PDF包含将字符代码映射到字形索引的CMAP。因此,CID是CMAP表中它映射到的字形的字符标识。此外,根据类似问题的评论 浏览332提问于2018-06-09得票数 4 回答已采纳 3回答 从错误的PDF中提取文本 、、 我有一个PDF文件与宝贵...
First of all thanks for developing and maintaining PyMuPDF. This is very helpful. I have the following problem: For some fonts in some PDFs some characters cannot be extracted correctly, because their CMap / ToUnicode doesn't make sense ...
But what concerns me much more are all these "Error: Illegal entry in bfrange block in ToUnicode CMap" lines... Now, this may well be a bug in the pdffonts utility, which claims to see an error where there is none. However, some change in pdfwrite's handling of (already embedded!
In fact the CMap 90ms-RKSJ-H has a well defined mapping to Unicode. 2. CMaps may not survive redistilling. 3. ToUnicode cannot survive redistilling. When a PDF is printed, the print mechanism is concerned ONLY with visible entities. NOTHING else is designed to be kept, include interactivity...
1. The ability to copy the text does not prove there was a ToUnicode map. 32000-1 gives the method for text extraction, and ToUnicode is only part of this. Also, where these methods do not apply a viewer may use other methods and special knowledge. In fact the CMap 90ms-RKSJ-H has...
EN首先需要执行命令pip install pdfminer3k来安装处理PDF文件的扩展库。 import os import sys import ...
21. find命令 在当前目录搜索文件 rumenz@local:~# find -name *.sh ./Desktop/load.sh ./...