ocrmypdf
It uses the Tesseract OCR engine and so supports all the languages that Tesseract does.
Some other main features:
* Places OCR text accurately below the image to ease copy / paste * Keeps the exact resolution of the original embedded images * When possible, inserts OCR information as a lossless operation without rendering vector information * Keeps file size about the same * If requested deskews and/or cleans the image before performing OCR * Validates input and output files * Provides debug mode to enable easy verification of the OCR results * Processes pages in parallel when more than one CPU core is available * Battle-tested on thousands of PDFs, a test suite and continuous integration.
Latest reviews
1
Installed but does not launch. Instead of installing from Software Manager, I recommend this approach. It also describes how ocrmypdf operates: https://www.talido.com/blog/how-to-ocr-pdf-files-on-linux-using-ocrmypdf/
1
Mint 21.2. Installed from software manager. Would not start. Not anywhere in menu.
5
Mint19.3 Worked amazingly well. Had a pdf with fine technical details that was stored as an image with encryption. Printed to pdf to remove encryption, then used this to OCR to a new file to make the text searchable. Worked like a champ!
5
I needed this app for the german lawyer electronic postal service (beA) and it worked PERFECTLY with tesseract, which I installed before. Really a great relief!!