Business card reader or OCR Library for iPhone SDK

I want to develop a Business card reader or OCR Library (Open Source) for iPhone.

I saw reference for www.code.google.com/p/tesseract-ocr/ but i don't know how to use it. I also download zip file http://tesseract-ocr.googlecode.com/files/tesseract-3.00.tar.gz but don't know how to use it开发者_StackOverflow into my project.

Can anyone give me suggestion for this or any example will be very useful.

Thanks in Advance.

EXC_BAD_ACCESS:

He's never instantiating the 'tess' variable. Simply add [self startTesseract]; to the viewDidLoad() method in OCRDemoViewController and it will work like a charm.