Simple pattern recognition from paper: knowledge test [closed]

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I want to make an app for test validation (on paper) with the camera (ex. android). Accordingly, I need to recognize filled response options on a paper, which I will do in advance.

Prompt, where to start? Where to dig? I know of the existence of the library OpenCV - it will help me?

Thank you.

Answer 1

OpenCV will definitely get you there.

Have a look at this tutorial: http://blog.ayoungprogrammer.com/2013/03/tutorial-creating-multiple-choice.html