There's also https://scantailor.org/ (and a maintained fork at https://github.com/4lex4/scantailor-advanced ) which semi-automates unwarping and other corrective tasks in scanned books. - Source: Hacker News / about 1 year ago

Scantailor (https://scantailor.org) is the tool for self-scanned books that exist in images (png, jpg, etc). However, I usually use Irfanview with PDF plugin (https://irfanview.com - download both Irfanview and the Plugins from this home page) I have elsewhere in r/PDF shown how you can do batch splitting of two-page scans, clean up muddy pages (yellowed or browned) . In the Reddit search box, search for... Source: over 1 year ago

Scantailor https://scantailor.org/ might be useful. Source: over 1 year ago

Scantailor is a good open source option that has a lot of features centered towards this process. Source: over 1 year ago

I use OCRmyPDF on a regular basis to OCR journal articles my library sends me. I've found it works great on English but (with appropriate language packs installed) works poorly on Greek and Hebrew. It also makes no effort to understand the layout of pages (e.g., tables). The project is fantastic, though. I've often considered building a web frontend that cleans up PDFs and then OCRs them using OCRmyPDF. For... - Source: Hacker News / almost 2 years ago

An Android tablet and the CoolReader app. For me, it's simply the best eReader experience available. It's incredibly customisable. The only downside is it doesn't support PDF or AZW3, both of which can be reformatted to your preferred file type with Calibre anyway. Source: over 1 year ago

Cool reader is also another option https://sourceforge.net/projects/crengine/. Source: about 3 years ago