[A,map1]=imread('bellleft.bmp');
subplot(231);image(A);colormap(map1);
title('原始圖象A');
axis square

[B,map2]=imread('bellright.bmp');
subplot(232);image(B);colormap(map2);
title('原始圖象B');
axis square


X=0.5*A+0.5*B;
subplot(233);image(X);
title('加權平均');
axis square

Y=max(A,B);
subplot(234);image(Y);
title('MAX');
axis square

Z=min(A,B);
subplot(235);image(Z);
title('MIN');
axis square

[I,map3]=imread('bell.bmp');
subplot(236);image(I);colormap(map3);
title('對比圖');
axis square