Teaonly

function [outImage] = simu( imgfile )
txtImage = rgb2gray( imread( imgfile ));
[height width] = size(txtImage);

outImage = ones(height, width);

for y=1:2:height
    for x=1:2:width
        if ( txtImage(y,x) == 0) 
            outImage = addPoint(outImage, y, x);