How to Increase the contrast of a Image

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Tricky
Tricky 2011-11-3
Hi..
I worked with imadjust and unsharp to increase the contrast of image while detecting the edge but I was unable to detect edge at a place in between the slightly same brightness regions.How to increase the contrast evenmore to get a good edge detection at this place Can someone help me?

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Image Analyst
Image Analyst 2011-11-3
Not unless you post an image somewhere. Other than that, about all I could say is if you want to enhance only along lines going in between bright areas, you might try anisotropic diffusion. Code for that can be found here: http://www.csse.uwa.edu.au/~pk/Research/MatlabFns/#anisodiff

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