L1 = imread('portrait.jpg');
figure; imshow(L1)
[x,y] = ginput(1);
[x1, y1] = ginput(1);
L2 = L1(fix(y):fix(y1),fix(x):fix(x1));
L3 = imresize(L2,10,'nearest');
figure(2);
imshow(L3);
set(2,'Name','nearest');
L3 = imresize(L2,10,'bilinear');
figure(3);
imshow(L3);
set(3,'Name','bilinear');
L3 = imresize(L2,10,'lanczos2');
figure(4);
imshow(L3);
set(4,'Name','lanczos2');
L3 = imresize(L2,10,'bicubic');
figure(5);
imshow(L3);
set(5,'Name','bicubic');