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I want to calculate the means luminance value of an image block
i found the formula is..
luminance= 0.3 R + 0.59 G + 0.11 B
but how i can calculate the R, G and B values.
i know that
R=rgb_img(:,:,1) G=rgb_img(:,:,2) B=rgb_img(:,:,3)
but it give in the shape of matrix, i think i need only a single value of R,G and B, to use above luminance formula.
please help me out.
Thanks in Advance
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