X = imread('face01.png');
X = double(X) ./ 255.0;

[U,S,V] = svd(X);

imshow(U(:,1)  * S(1,1) * V(:,1)' );
imshow(U(:,1:5)* S(1:5, 1:5) * V(:,1:5)');
imshow(U(:,1:10)* S(1:10, 1:10) * V(:,1:10)');