基于ORL库和PCA方法的人脸识别系统matlab源码

基于剑桥大学的ORL人脸数据集，用PCA方法提取特征脸（主成分脸），并重构人脸图像，进一步和原样本图像进行对比。本系统采用matlab代码实现。

function [xApprox]=approx（xk）

%UNtitleD2 此处显示有关此函数的摘要
%   此处显示详细说明
load PCA.mat
nLen=length（x）;
xApprox=meanVec;
for ii=1:k
    xApprox=xApprox+（（x-meanVec）*V（:ii））*V（:ii）‘;
end

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2018-10-15 17:47  PCA_ORL\
     目录           0  2018-10-13 21:31  PCA_ORL\Data\
     目录           0  2018-10-15 20:15  PCA_ORL\Data\ORL\
     文件     1903828  2018-10-13 21:45  PCA_ORL\Data\ORL\FaceMat.mat
     文件     1614904  2018-10-13 21:45  PCA_ORL\Data\ORL\PCA.mat
     文件        1579  1995-02-23 18:13  PCA_ORL\Data\ORL\README
     文件     3769022  2018-10-13 21:30  PCA_ORL\Data\ORL\att_faces.zip
     目录           0  2018-10-13 21:32  PCA_ORL\Data\ORL\s1\
     文件       10318  1994-04-18 14:17  PCA_ORL\Data\ORL\s1\1.pgm
     文件       10318  1994-04-18 14:07  PCA_ORL\Data\ORL\s1\10.pgm
     文件       10318  1994-04-18 14:17  PCA_ORL\Data\ORL\s1\2.pgm
     文件       10318  1994-04-18 14:17  PCA_ORL\Data\ORL\s1\3.pgm
     文件       10318  1994-04-18 14:17  PCA_ORL\Data\ORL\s1\4.pgm
     文件       10318  1994-04-18 14:17  PCA_ORL\Data\ORL\s1\5.pgm
     文件       10318  1994-04-18 14:07  PCA_ORL\Data\ORL\s1\6.pgm
     文件       10318  1994-04-18 14:07  PCA_ORL\Data\ORL\s1\7.pgm
     文件       10318  1994-04-18 14:07  PCA_ORL\Data\ORL\s1\8.pgm
     文件       10318  1994-04-18 14:07  PCA_ORL\Data\ORL\s1\9.pgm
     目录           0  2018-10-13 21:32  PCA_ORL\Data\ORL\s10\
     文件       10318  1994-04-18 14:18  PCA_ORL\Data\ORL\s10\1.pgm
     文件       10318  1994-04-18 14:07  PCA_ORL\Data\ORL\s10\10.pgm
     文件       10318  1994-04-18 14:18  PCA_ORL\Data\ORL\s10\2.pgm
     文件       10318  1994-04-18 14:18  PCA_ORL\Data\ORL\s10\3.pgm
     文件       10318  1994-04-18 14:18  PCA_ORL\Data\ORL\s10\4.pgm
     文件       10318  1994-04-18 14:18  PCA_ORL\Data\ORL\s10\5.pgm
     文件       10318  1994-04-18 14:07  PCA_ORL\Data\ORL\s10\6.pgm
     文件       10318  1994-04-18 14:07  PCA_ORL\Data\ORL\s10\7.pgm
     文件       10318  1994-04-18 14:07  PCA_ORL\Data\ORL\s10\8.pgm
     文件       10318  1994-04-18 14:07  PCA_ORL\Data\ORL\s10\9.pgm
     目录           0  2018-10-13 21:32  PCA_ORL\Data\ORL\s11\
     文件       10318  1994-04-18 14:18  PCA_ORL\Data\ORL\s11\1.pgm
............此处省略425个文件信息