Region_growing

function [ img ] = region_growing( img, seed )
    [x, y] = size(img);
    s1 = seed(1);
    s2 = seed(2);
    img(s1, s2) = 0;

    if ((s1 ~= 1) && img(s1 - 1, s2) == 255)
        img = region_growing(img, [s1 - 1, s2]);
    end

    if ((s1 ~= (x - 1)) && img(s1 + 1, s2) == 255)
        img = region_growing(img, [s1 + 1, s2]);
    end

    if ((s2 ~= 1) && img(s1, s2-1) == 255)
        img = region_growing(img, [s1, s2-1]);
    end

    if ((s2 ~= (y - 1)) && img(s1, s2 + 1) == 255)
        img = region_growing(img, [s1, s2 + 1]);
    end
end