crop a charater from an image

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How can crop and display a character in an image without using mouse?
The image contain only a one charater and nothing else.
Example a scanned copy of a paper, which contain a character drawn on it.

Posted 16-Mar-12 3:54am

gavkk

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pietvredeveld · Answer 1 · 2012-03-16T05:36:00

Solution 1

By scanning the image from the edges until a color change is detected.

Regards
Piet

Posted 16-Mar-12 5:36am

pietvredeveld

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gavkk 26-Mar-12 8:47am

What if the color change is due to any noise ?