I have a pdf file (500 pages) with a lot of images ( black and white). However, the text is blurred and although it is readable, it's really a pain ( maybe hardcopy was scanned poorly, not sure on that).

Is there some way I can 'clean' the pdf file ? I can manage with diagrams in the present quality because they are big and so I'm ok. But the text is not manageable. So ideally, I would like to create a replica but with good text quality.

I can't really use some convertors because there are images in the pdf file (and that too plenty in no).

Using ubuntu 14.04.

I'm not a dev. Just a normal user.


I would again like to emphasise that pdf file has a lot of images as well, and text is blurred badly. Unfortunately, gscan2pdf didn't work at all.


You should try using gscan2pdf, One of my mates was using it recently and said it was good and made the font readable.

Here's a link for the same : https://apps.ubuntu.com/cat/applications/precise/gscan2pdf/

  • Nope. That didnt work. I Tried 'clean' option with the pdf as well as OCR. Both didnt work. – Plutonium smuggler May 1 '15 at 17:29
  • @ParanoidPanda: That's irrelevant, because the link doesn't try to provide instructions but a piece of software. – David Foerster May 2 '15 at 21:22
  • 1
    @Siddarth: Please explain, how to use gscan2pdf to “clean” scanned images (see How do I write a good answer?). – David Foerster May 2 '15 at 21:22

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.