getnonfacesamples.m

It is for Face Recognition

%function [nfSamples]=getNonFaceSamples(jpg, W, H, n)
function [nfSamples]=getNonFaceSamples(jpg, W, H, n)
 dbg='n';
 if dbg=='y'
   jpg='data\nf1.jpg';
   W=20; H=25; n=100;
 end 

 img = imread(jpg, 'jpg');
 [imH imW]=size(img);
 
 xy=rand(2, n);

 m=0;
 for k=1:n
    x=fix(imW*xy(1,k))+1; y=fix(imH*xy(2,k))+1;
    if x+W<imW & y+H<imH        % within the img
       nf = img(y:y+H-1, x:x+W-1);
       vec = im2vec(nf)';
       m=m+1; 
       nfSamples(:,m)=vec;
    end
 end