2
votes
2answers
695 views

OCR that adds generated text to the original pdf and djvu files?

My OS is Ubuntu. I found there are some applications can OCR a pdf or djvu file, generating another text file. But I was wondering how to add the OCRed text onto the original pdf or djvu files, to ...
21
votes
8answers
32k views

How to extract text with OCR from a PDF on Linux?

How do I extract text from a PDF that wasn't built with an index? It's all text, but I can't search or select anything. I'm running Kubuntu, and Okular doesn't have this feature.