www.gusucode.com > 人脸相似匹配源码程序 > 人脸相似匹配源码程序/FaceRec/visualize_pc.m

    function visualize_pc(E)
% 显示主成分分量（主成分脸，即变换空间中的基向量）
%
% 输入：E --- 矩阵，每一列是一个主成分分量


[size1 size2] = size(E);
global imgRow;
global imgCol;
row = imgRow;
col = imgCol;

if size2 ~= 20
   error('Can only display 20 principle components');
end;

c1 = zeros(row,col*5);
c2 = c1;
c3 = c1;
c4 = c1;
c1(:) = E(:,1:5);
c2(:) = E(:,6:10);
c3(:) = E(:,11:15);
c4(:) = E(:,16:20);
size(c1)

composite=zeros(row*4,col*5);
composite(:)=[c1;c2;c3;c4];

figure;
colormap(gray);
imagesc(composite);   
axis image;
m=min(min(composite));
M =max(max(composite));
imwrite(uint8((composite-m)*(255/(M-m))),'composite.tiff');