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how to automatically cropp the picture

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Dhandapani.S
Dhandapani.S on 24 Jan 2015
Edited: Geoff Hayes on 25 Jan 2015
this is the image before cropping.
i need a program which will automatically crop like the one below
i can get rid of extra outer space and thus reduce image sixe. i thought of finding the left most and right most, bottom most and top most pixel points and keeping this points we can crop upto those points. please help me with the code..

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