About RGB image edge detection

How to find edge detection of RGB image using component gradient operator like sobel gradient and laplace gradient operator?

Answer 1

[Image Analyst]

For starters you could use rgb2hsv and then run an edge detector on the V channel. This would detect edges in the luminance channel only. A better method might be to calculate "delta E" (the CIELAB color difference metric) between the center pixel and it's neighbors in a sliding window. You could use nlfilter() for that.

[Image Analyst]

I'm attaching my local Delta E color edge detector in case anyone wants it.