Object pattern training and recognition (Image based)

Question

Is there any c/c++ library for object pattern training and recognition? I need to implement feature and functionalities similar to what Google Goggles (http://www.google.com/mobile/goggles/#text) does

Answer 1

You could take a look at Tessarect:

Tesseract is a free software optical character recognition engine for various operating systems. Originally developed as proprietary software at Hewlett-Packard between 1985 and 1995, it had very little work done on it in the following decade. It was then released as open source in 2005 by Hewlett Packard and UNLV. Tesseract development has been sponsored by Google since 2006. It is released under the Apache License, Version 2.0. Tesseract is considered one of the most accurate free software OCR engines currently available.

You could find some information here and here. Source seems to be available at this link: http://tesseract-ocr.googlecode.com/svn/trunk/