12-6.m

matlab6.5图形图像处理一书中所有的源程序

I = imread('cameraman.tif');
J = uint8(filter2(fspecial('gaussian'), I));
K = imlincomb(1,I,-1,J,128); 
% 运算关系式K(r,c) = I(r,c) - J(r,c) + 128
imshow(K)