files = dir('images/*.bmp');
for file = files'
    i = imread(strcat('images/',file.name));
    file.name
    [r, c] = size(i);
    a = zeros(r/2, c/2);
    for x=2:2:r,
        for y=2:2:c,
            if i(x,y) > 100,
                a(x/2,y/2) = 255;
            else
                a(x/2,y/2) = 0;
            end;
        end;
    end;
    imwrite(logical(a), strcat('images/Converted/',file.name));
end