anothermatlabcrap.m

img_bw = img_gray;
treshold_level = 0.4; % mean(mean(img_gray))
for i = 1 : info.Height
    for j = 1 : info.Width
        if (img_gray(i,j) > treshold_level)
            img_bw(i, j) = 255;
        else
            img_bw(i, j) = 0;
        end
    end
end
figure
imshow(img_bw);