img = imread('./15403096_1818017151780287_1494533510_n.jpg');
y = D35WQ8_RGB_to_YCbCr(img);
close all;
figure(1);
imshow(img);
figure(2);
subplot(221);
imshow(y);
subplot(222);
imshow(y(:,:,1));
subplot(223);
imshow(y(:,:,2));
subplot(224);
imshow(y(:,:,3));