How to check the color variation in the ROI of an image

Hi All,

I have many coloured images,please could anyone tell me how to check the color variation in the ROI (segmented image) of an image?

thanks in advance

[hamed abdulaziz]

Could anyone answer me please?

Answer 1

[Image Analyst]

One reasonable way would be to calculate the mean color of the image. Then calculate the delta E (color difference) from every pixel to that mean color. Then histogram the delta E image. See http://www.mathworks.com/matlabcentral/fileexchange/31118-color-segmentation-by-delta-e-color-difference

Or you might want to calculate the Color Frequency Image