matlab中人脸识别代码的一些问题 基于matlab简单的特征脸的人脸识别程序
matlab \u4eba\u8138\u68c0\u6d4b\u7a0b\u5e8f\u4e2d\u4e0b\u9762\u4ee3\u7801\u662f\u4ec0\u4e48\u610f\u601d\u554a\uff0c\u6c42\u5927\u795e\u4e3b\u8981\u5c31\u662f\u52a0\u8f7d\u8bad\u7ec3\u597d\u7684\u5206\u7c7b\u5668\uff0c\u548c\u68c0\u6d4b\u4ee3\u7801\uff0ccvLoad\u548cdetect_and_draw(\u4e00\u822c\u51fd\u6570\u540d\u5b57\u90fd\u53eb\u8fd9\u4e2a)\uff0c\u6211\u4ee5\u524d\u6574\u7406\u7684\u8d44\u6599\uff0c\u53ef\u4ee5\u53c2\u8003\u4e0b
\u8fd9\u662f\u6211\u5199\u7684\u7a0b\u5e8f\uff0c\u53c2\u7167\u300a\u6a21\u5f0f\u8bc6\u522b\u300b\u5f20\u5b66\u5de5\u7b2c9\u7ae0\u3002
a1=imread('a1.jpg');
a2=imread('a2.jpg');
b1=imread('b1.jpg');
b2=imread('b2.jpg');
a1=rgb2gray(a1);
a2=rgb2gray(a2);
b1=rgb2gray(b1);
b2=rgb2gray(b2);
figure,imshow(a1)
figure,imshow(a2)
figure,imshow(b1)
figure,imshow(b2)
a1=double(a1);
a2=double(a2);
b1=double(b1);
b2=double(b2);
a1_lie=a1(:);
a2_lie=a2(:);
b1_lie=b1(:);
b2_lie=b2(:);
c=cat(1,a1_lie',a2_lie',b1_lie',b2_lie');
c_mean=mean(c);
X=[a1_lie-c_mean',a2_lie-c_mean',b1_lie-c_mean',b2_lie-c_mean'];
R=X'*X; % R\u662f4\u00d74\u7684\u77e9\u9635
[p,q]=eig(R);
u=diag(q); % u\u662f4\u00d71\u7684\u5217\u5411\u91cf
u=flipud(u); % flipud(u)\u5b9e\u73b0\u77e9\u9635\u7684\u4e0a\u4e0b\u7ffb\u8f6c\uff0c u\u662f4\u00d71\u7684\u5217\u5411\u91cf
v=fliplr(p); % fliplr(p)\u5b9e\u73b0\u77e9\u9635\u7684\u5de6\u53f3\u7ffb\u8f6c\uff0cv\u662f4\u00d74\u7684\u77e9\u9635
e=zeros(36000,4);
for m=1:3
e(:,m)=X*v(:,m)./(u(m)^(-0.5)); % \u53c2\u89c1\u300a\u6a21\u5f0f\u8bc6\u522b\u300bP226\u516c\u5f0f9-18
end
p1=zeros(200,180);
p2=zeros(200,180);
p3=zeros(200,180);
for m=1:36000
p1(m)=e(m);
p2(m)=e(m+36000);
p3(m)=e(m+72000);
end
p1=mat2gray(p1);
p2=mat2gray(p2);
p3=mat2gray(p3);
figure,imshow(p1) % \u663e\u793a\u7b2c1\u7279\u5f81\u8138
figure,imshow(p2) % \u663e\u793a\u7b2c2\u7279\u5f81\u8138
figure,imshow(p3) % \u663e\u793a\u7b2c3\u7279\u5f81\u8138
new=c*e(:,1:3); %\u5206\u522b\u8ba1\u7b974\u4e2a\u8bad\u7ec3\u6837\u672c\u5206\u522b\u5728\u7b2c1\u3001\u7b2c2\u3001\u7b2c3\u3001\u7279\u5f81\u8138\u4e0a\u7684\u6295\u5f71
p1=imread('p_test1.jpg'); %\u8bfb\u5165\u4e00\u4e2a\u6d4b\u8bd5\u6837\u672c
p1=rgb2gray(p1);
figure,imshow(p1);
p2=double(p1(:));
test=p2'*e(:,1:3);%\u8ba1\u7b97\u6d4b\u8bd5\u6837\u672c\u57283\u4e2a\u7279\u5f81\u8138\u4e0a\u7684\u6295\u5f71
error=zeros(4,1);
for m=1:4
error(m)=norm((new(m,:)-test));
end
[distence,index]=sort(error); %\u5c06\u5217\u5411\u91cferror\u4e2d\u7684\u6570\u636e\u6309\u4ece\u5c0f\u5230\u5927\u6392\u5217
if index(1)==1
result=1;
elseif index(1)==2
result=1;
elseif index(1)==3
result=2;
elseif index(1)==4
result=2;
end
result %result\u4e3a1\u65f6\u8868\u793a\u6d4b\u8bd5\u6837\u672c\u5c5e\u4e8e\u7b2c1\u4e2a\u4eba\uff0c\u4e3a2\u65f6\u8868\u793a\u6d4b\u8bd5\u6837\u672c\u5c5e\u4e8e\u7b2c2\u4e2a\u4eba
ROI:(Regions of Interest，ROI)它是利用开运算或闭运算做形态学的平滑（b( x,y ) ），a( x,y） =
f ( x,y） - b( x,y )
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