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how to remove the remaining part other than triangle any suggestion please

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Matt J
Matt J on 3 Jan 2014
Edited: Matt J on 3 Jan 2014
Maybe use HOUGHLINES to find lines longer than a certain threshold length?

saravanakumar D
saravanakumar D on 3 Jan 2014
Use the function bwareaopen. So we can eliminate the lower pixel images on the file. In your image triangle has the largest pixels.
Example:- output=bwareaopen(image,50);
50 is threshold pixel rate

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