I= imread('peppers.png'); 
[i,j,k] = size(I); 
CONVERTER = [0.299 	0.587 	0.114 
			-0.14713 	-0.28886 	0.436 
			0.615 	-0.51498 	-0.10001]; 
for row = 1:i 
	for col = 1:j 
		RGB = [ I(row, col, 1) 
			I(row, col, 2) 
			I(row, col, 3)]; 
		YUV = CONVERTER * double(RGB); 
		O(row, col, :) = uint8(YUV); 
	end 
end