Java tutorial
import java.awt.image.BufferedImage; public class Main { static BufferedImage enlarge(BufferedImage image, int n) { int w = image.getWidth() / n; int h = image.getHeight() / n; BufferedImage shrunkImage = new BufferedImage(w, h, image.getType()); for (int y = 0; y < h; ++y) for (int x = 0; x < w; ++x) shrunkImage.setRGB(x, y, image.getRGB(x * n, y * n)); return shrunkImage; } }