test.m

该文件架下一共有4个matlab程序。结合到一起可以实现在matlab下实现选中ORL库的一幅图像然后找出与之最相近3张照片并显示出来。

function [rle,rab] = Test( num,testData,eigenVector,meanData,new_data,threshold)
%TEST Summary of this function goes here
%   Detailed explanation goes here
% rle is the index of the picture that the th lower than threshold
% rab is the index of the picture that the th higher than threshold
test=testData-meanData;
test=test*eigenVector;
m=size(new_data);
result=zeros(1,num);
min=zeros(1,num);
for i=1:num
    temp=test-new_data(i,:);
    d=temp*temp';
    d=d^(2\1);
    min(i)=d;
    result(i)=i;
    for k=i:-1:2
        if(min(k-1)>d)
            tmp=min(k-1);
            min(k-1)=d;
            min(k)=tmp;
            r=result(k-1);
            result(k-1)=i;
            result(k)=r;
        else
            break;
        end
    end
end
for j=num+1:m
    temp=test-new_data(j,:);
    d=temp*temp';
    d=d^(2\1);
    r=find(min>d);
    if isempty(r)==0
        for l=num:-1:r(1)+1
            min(l)=min(l-1);
            result(l)=result(l-1);
        end
        min(r(1))=d;
        result(r(1))=j;
    end
end
rle=zeros(0);
rab=zeros(0);
rr=find(min>threshold);
if isempty(rr)==0
    rab=result(rr(1):num);
    if rr(1)>1
        rle=result(1:(rr(1)-1));
    end
else
    rle=result;
end