******* this report is a summary of known problems and feature requests
*** recent status information after release of rc3 see comment #6
The text recognition feature (OCR - Region.text()) together with the possibility to find text in an image is still experimental and under developement.
This are currently reported bugs:
bug 777660: text recognition errors with some fonts
bug 783082: [request] want font parameters for text recognition
bug 735434: Text extraction from Images fails in some cases on colored backgrounds
bug 695616: Inconsistency in text recognition and matching, especially with integers-as-text!
bug 695650: find(text).text() does not return same text
bug 701005: text() always returns text with trailing x'200A20'
bug 701012: text() does not return all intervening blanks, add's others
bug 795391: [request] OCR/tesseract: allow new training sets for other languages and more tesseract features
Other experienced oddities
-- there are problems with text, that is not in english language
-- very small and very large fonts may not work
-- multiline text makes problems
-- intervening/preceding/trailing grafics and symbols are tried to be interpreted as text
Tip when using Region.text():
Currently you get the best results, when the region represents only one line of text and only contains text (no graphics/symbols) in english language. If you can influence it: make the text as large as possible.
-- additional information:
Internally the tesseract OCR engine (http://code.google.com/p/tesseract-ocr/) is used.
So their restrictions apply (e.g. minimum size of font, ...).
Information can be found on their Wiki.