my_rgb2yuv.m

function YUV = my_rgb2yuv(img)
    img = im2double(img);
    if size(img,3) ~= 3
        error('image is not color RGB');
    else
        R = img(:,:,1);
        G = img(:,:,2);
        B = img(:,:,3);
    end
    Y = 0.299 * R + 0.587 * G + 0.114 * B;
    U = -0.14713 * R - 0.28886 * G + 0.436 * B;
    V = 0.615 * R - 0.51499 * G - 0.10001 * B;

    YUV = cat(3,Y,U,V);
end