rgb=imread（‘E:\1.jpg‘）;
image_1=rgb2gray（rgb）;

%subplot（423）;imshow（image_1（::2））;
%subplot（424）;imshow（image_1（::3））;
[mn]=size（image_1）;%????????????n????Gray?
?
num=zeros（1256）;%????????????
?
p=zeros（1256）;%??????????

%image_1=round（255*image_1）;
?
?
???for?i=1:m?
????????for?j=1:n?
????????????num（image_1（ij）+1）=num（image_1（ij）+1）+1;%?????????????
????????end?
????end?
?
????for?i=1:256?
????????p（i）=num（i）/（m*n）;%????????????
????end?
?
for?i=2:256?
????????if?p（i）~=0?
????????????st=i+1;%??????????0???????
????????????break?
????????end?
end?
?
for?i=256:-1:1?
????????if?p（i）~=0;?
????????????nd=i-1;%??????????0???????
????????????break?
????????end?
end?
?
%????????????????????
w=inf;?th=0;?
?
for?t=st:nd%?????????????????

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2012-12-26?12:21??SVMZZ\
?????文件?????????412??2012-11-28?16:57??SVMZZ\0008.txt
?????文件?????4872396??2012-11-28?16:57??SVMZZ\1751.JPG
?????文件??????142332??2012-11-28?16:57??SVMZZ\1969.JPG
?????文件??????139767??2012-11-28?16:57??SVMZZ\2023.JPG
?????文件????????3120??2012-11-28?16:57??SVMZZ\5.asv
?????文件????????3122??2012-12-08?10:48??SVMZZ\5.m
?????文件????????2856??2012-11-28?16:57??SVMZZ\SVMNR.m
?????文件????????3353??2012-11-28?16:57??SVMZZ\SVMOSTU.asv
?????文件????????3886??2012-11-28?16:57??SVMZZ\SVMOSTU.m
?????文件??????????59??2012-11-28?16:57??SVMZZ\cc.m
?????文件?????????120??2012-11-28?16:57??SVMZZ\ccc.asv
?????文件????????3697??2012-11-28?16:57??SVMZZ\ccc.m
?????文件????????3179??2012-11-28?16:57??SVMZZ\cd.m
?????文件????????7779??2012-11-28?16:57??SVMZZ\data_res.mat
?????文件???????27648??2012-11-28?16:57??SVMZZ\datatest.xls
?????文件????????1883??2012-11-28?16:57??SVMZZ\juzhen.asv
?????文件?????????384??2012-11-28?16:57??SVMZZ\juzhen.m
?????文件?????????704??2012-11-28?16:57??SVMZZ\lizi.m
?????目錄???????????0??2012-12-26?16:51??SVMZZ\ohta\
?????文件???????48156??2012-11-28?16:57??SVMZZ\ohta\1.jpg
?????文件???????39517??2012-11-28?16:57??SVMZZ\ohta\10.jpg
?????文件???????61861??2012-11-28?16:57??SVMZZ\ohta\100.jpg
?????文件???????54688??2012-11-28?16:57??SVMZZ\ohta\101.jpg
?????文件???????47384??2012-11-28?16:57??SVMZZ\ohta\102.jpg
?????文件???????30841??2012-11-28?16:57??SVMZZ\ohta\103.jpg
?????文件???????53700??2012-11-28?16:57??SVMZZ\ohta\104.jpg
?????文件???????58063??2012-11-28?16:57??SVMZZ\ohta\105.jpg
?????文件???????58615??2012-11-28?16:57??SVMZZ\ohta\106.jpg
?????文件???????64741??2012-11-28?16:57??SVMZZ\ohta\107.jpg
?????文件???????63957??2012-11-28?16:57??SVMZZ\ohta\108.jpg
............此處省略139個文件信息