How to Increase the contrast of a Image

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?

Answer 1

[Image Analyst]

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