%?特征人臉
function?[]?=?eigface（）

allsamples=[];??%所有訓練圖像
for?i=1:7
????a=imread（??strcat（?‘D:\s1‘???‘\‘??num2str（i）??‘.BMP‘?）?）;????%?讀取文件夾里所有圖片
????%?figure（i）imshow（a）;
????b=a（?1:100*100?）;????????????????????????%?b是行矢量?1×N，其中N＝10000，提取順序是先列后行，即從上到下，從左到右
????b=double（b）;
????allsamples=[?allsamples;?b?];????????????%?allsamples是一個M*N?矩陣，allsamples中每一行數據代表一張圖片，其中M＝10
end

samplemean=mean（allsamples）;?%?平均圖片，1?×?N
for?i=1:7
????xmean（i:）=allsamples（i:）-samplemean;?%?xmean?是一個M?×?N?矩陣，xmean每一行保存的數據是“每個圖片數據-平均圖片”
end;

%?獲取特征值及特征向量
sigma=xmean*xmean‘;???%?M?*?M?階矩陣
[v?d]=eig（sigma）;
d1=diag（d）;

%?按特征值大小以降序排列
dsort?=?flipud（d1）;
vsort?=?fliplr（v）;

%以下選擇90%的能量
dsum?=?sum（dsort）;
dsum_extract?=?0;
p?=?0;
while（?dsum_extract/dsum?????p?=?p?+?1;
???

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

?????文件???????1780??2011-09-13?16:02??【matlab】PCA人臉識別\eigface.m

?????文件???????2612??2011-09-13?16:08??【matlab】PCA人臉識別\FaceRec.m

?????文件????????814??2011-09-13?16:04??【matlab】PCA人臉識別\Reconstruct.m

?????文件??????11078??2002-03-29?15:24??【matlab】PCA人臉識別\s1\1.BMP

?????文件??????11078??2002-03-29?15:24??【matlab】PCA人臉識別\s1\2.BMP

?????文件??????11078??2002-03-29?15:24??【matlab】PCA人臉識別\s1\3.BMP

?????文件??????11078??2002-03-29?15:24??【matlab】PCA人臉識別\s1\4.BMP

?????文件??????11078??2003-03-31?20:37??【matlab】PCA人臉識別\s1\5.1.bmp

?????文件??????11078??2002-03-29?15:24??【matlab】PCA人臉識別\s1\5.BMP

?????文件??????11078??2002-03-29?15:24??【matlab】PCA人臉識別\s1\6.BMP

?????文件??????11078??2002-03-29?15:24??【matlab】PCA人臉識別\s1\7.BMP

????..A.SH.?????24064??2007-08-11?10:48??【matlab】PCA人臉識別\s1\Thumbs.db

?????文件???????1869??2011-09-13?16:02??【matlab】PCA人臉識別\test\1.jpg

?????文件???????2109??2011-09-13?16:02??【matlab】PCA人臉識別\test\2.jpg

?????文件???????2249??2011-09-13?16:02??【matlab】PCA人臉識別\test\3.jpg

?????文件???????2074??2011-09-13?16:02??【matlab】PCA人臉識別\test\4.jpg

?????文件???????2198??2011-09-13?16:02??【matlab】PCA人臉識別\test\5.jpg

?????文件???????2429??2011-09-13?16:02??【matlab】PCA人臉識別\test\6.jpg

?????文件???????1821??2011-09-13?16:02??【matlab】PCA人臉識別\test\average.jpg

?????文件?????418622??2011-09-13?16:02??【matlab】PCA人臉識別\test\eigface.mat

?????文件??????11078??2002-03-29?15:24??【matlab】PCA人臉識別\test2\10.BMP

?????文件???????1782??2011-09-13?16:03??【matlab】PCA人臉識別\test2\人臉重建2.jpg

?????文件???????2061??2011-09-13?16:03??【matlab】PCA人臉識別\test2\人臉重建4.jpg

?????文件???????2077??2011-09-13?16:03??【matlab】PCA人臉識別\test2\人臉重建6.jpg

?????文件??????11078??2002-03-29?15:24??【matlab】PCA人臉識別\test3\1.BMP

?????文件??????11078??2002-03-29?15:24??【matlab】PCA人臉識別\test3\2.BMP

?????文件??????11078??2002-03-29?15:24??【matlab】PCA人臉識別\test3\3.BMP

?????目錄??????????0??2013-03-01?19:33??【matlab】PCA人臉識別\s1

?????目錄??????????0??2013-03-02?20:59??【matlab】PCA人臉識別\test

?????目錄??????????0??2013-03-01?19:33??【matlab】PCA人臉識別\test2

............此處省略5個文件信息