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I would like to crop photo such that only "necessary" thing left - in this case I mean text of photographed page left. I hope, that the belowe example demonstrates it clear.

I would like to do my task in python. I guess opencv library may be helpful, but what algorithms would you suggest to use? Write some own heuristics basing on image statistics, or are there some ready tools, and there is really no need for reinventing the wheel?

Exaple of task

andilabs
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    have a look here , t's c++ I guess it could help you http://stackoverflow.com/questions/7838487/executing-cvwarpperspective-for-a-fake-deskewing-on-a-set-of-cvpoint – Engine Aug 06 '13 at 01:41
  • it can be some intro: http://opencvpython.blogspot.com/2012/06/hi-this-article-is-tutorial-which-try.html – andilabs Nov 05 '13 at 01:15

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