I1=imread（‘atl_spotp_92.jpg‘）;
I2=imread（‘atl_spotp_87.jpg‘）;
I11=double（I1）;
I22=double（I2）;
[MN]=size（I1）;
I=I1-I2;
for?i=1:M
?????for?j=1:N
if??I（ij）>40
??I3（ij）=255;
?%?elseif?I（ij）<10
?????%?I3（ij）=125;
else
????I3（ij）=0;
end
????end
end
figureI3=uint8（I3）;
imshow（I3）

????

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????63352??2009-11-16?21:36??MATLAB\atl_spotp_92.jpg

?????文件??????56790??2009-11-16?21:36??MATLAB\atl_spotp_87.jpg

?????文件????????306??2011-06-19?11:15??MATLAB\Untitled.m

?????文件????????241??2009-11-16?22:02??MATLAB\Untitled.asv

????..A.SH.?????12800??2009-11-23?11:31??MATLAB\Thumbs.db

?????目錄??????????0??2011-06-19?13:37??MATLAB

-----------?---------??----------?-----??----

???????????????133489????????????????????6