I’ll join some other commenters, to add my favorite difficult pdf problem that I haven’t found a ready to use (even paid) solution for: extract key value pairs from a filled form such as this medical claims form:
There are two levels of difficulty: the starting file could be an image (pdf or png or jpg), which is the most difficult scenario. The slightly easier one is where it’s a text-based pdf so no OCR is needed.
I threw this as an image file at google form parser but it did poorly, I.e missed quite a few fields.
https://imgur.com/a/EJDi7L7
There are two levels of difficulty: the starting file could be an image (pdf or png or jpg), which is the most difficult scenario. The slightly easier one is where it’s a text-based pdf so no OCR is needed.
I threw this as an image file at google form parser but it did poorly, I.e missed quite a few fields.