Is there a library in objective-c or c that will do OCR?

Possible duplicate:
C / C ++ / Objective-C text recognition library

I want to develop an application for the iPhone that will perceive the image as input, and the output from it will be textual, just OCR. I want to know if there is a source, a built-in library or a free library that will be useful for this project.

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Source: https://habr.com/ru/post/1788905/


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