I=imread(filename);
red=I(:,:,1);
green=I(:,:,2);
blue=I(:,:,3);
Ravg=(sum(sum(red)))./((size(red,1)).*(size(red,2)));
Gavg=(sum(sum(green)))./((size(green,1)).*(size(green,2)));
Bavg=(sum(sum(blue)))./((size(blue,1)).*(size(blue,2)));
Best Answer