How to detect edges in color image?

I have done illumination normalization for RGB image and now i need to detect egdes for the normalized image. what to do for that? should I have to detect the edges for independent channels and then combine?

Answer 1

[Walter Roberson]

http://www.mathworks.com/matlabcentral/fileexchange/8267-edge-detection-of-color-images

http://www.mathworks.com/matlabcentral/fileexchange/28114-fast-edges-of-a-color-image--actual-color--not-converting-to-grayscale-

http://www.mathworks.com/matlabcentral/answers/75193-color-edge-detection-using-euclidean-distance-and-vector-angle

https://stackoverflow.com/questions/35104134/how-to-detect-edges-of-a-colored-photo