pic=?imread（‘D:\Picture\A.jpg‘）;
moban=imread（‘D:\Picture\B.jpg‘）;
pic=im2double（pic）;
moban=im2double（moban）;
subplot（221）;
imshow（pic）;
subplot（222）;
imshow（moban）;
pic1=pic;
[MN]=size（pic）;
[mn]=size（moban）;
d=zeros（M-mN-n）;
subplot（224）;
imshow（pic1）;
tic;
for?x=1:M-m
????for?y=1:N-n
????????Temp=0;
????????for?i=0:m-1
????????????for?j=0:n-1
??????