write("gradient-original.pgm"); // Scale a gray image $img = Image::fromFile(dirname(__FILE__). "/resources/gradient.pgm"); $img2 = $img -> scale(20, 20); $img2 -> write("gradient-small.pgm"); $img = Image::fromFile(dirname(__FILE__). "/resources/gradient.pgm"); $img3 = $img -> scale(60, 60); $img3 -> write("gradient-large.pgm");