How to mark the edges in Red Color in a image

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satendra kumar
satendra kumar 2012-12-11
Hello friends...Have a look on this image http://prntscr.com/lvljy I want to mark the edges of the selected portion. Please help me out of this. Thanks
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Image Analyst
Image Analyst 2012-12-11
There are several, or dozens, or hundreds of edges in there. Have you tried edge detectors, like the edge() function?

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