% Demo for display 4 images in one figure window ;
% by SimonYUMing , Apr. , 5,2010
% Read two images from the current directory ,for example dowel01.jpg and
% dowl02.jpg which all are color images;
X1=imread('dowel01.jpg');
X2=imread('dowel02.jpg');

% now generate two gray images from above color images
x1gray=rgb2gray(X1);
x2gray=rgb2gray(X2);
figure (1);
title('The example of display 4 images');
subplot(2,2,1), subimage(X1)
title('Title of image1');
xlabel('x label of image1');
ylabel('y label of image1');
subplot(2,2,2), subimage(X2)
title('Title of image2');
xlabel('x label of image2');
ylabel('y label of image2');
subplot(2,2,3), subimage(x1gray)
title('Title of image3');
xlabel('x label of image3');
ylabel('y label of image3');
subplot(2,2,4), subimage(x2gray)
title('Title of image4');
xlabel('x label of image4');
ylabel('y label of image4');