[zo1]

As the others in the thread have mentioned. Constrain your problem as a computer-vision one to segment nice pieces of work for Tesseract. Along with some nice training data, and possibly human validation if that's feasible.

All do-able within Linux.

[totalcookie]

As the parent of this comment thread mentions, Tesseract is not very great for mass usage due to the error rate with Abbyy much better. I would be interested in experience not opinion.