MATLAB: How to obtain single luminance value of an image

single luminance value

%Please help me .....
rgb_img=imread('pears.png');
R=rgb_img(:,:,1) ;
G=rgb_img(:,:,2) ;
B=rgb_img(:,:,3) ;
luminance = 0.299 * R + 0.587 * G + 0.114 * B

Best Answer

mean2(luminance)
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