Hey amelius! Though OCR would provide a generic solution, it would be an overkill for text-based PDFs. I'm working on getting a OCR solution up since there's still a lot of data that is trapped inside scanned PDFs and not text-based ones.

If you have any pointers in the OCR route, do suggest them here, or on this GitHub issue! https://github.com/socialcopsdev/camelot/issues/101