Java tutorial
import java.awt.image.BufferedImage; import java.io.File; import javax.imageio.ImageIO; public class Main { public static void main(String[] args) throws Exception { BufferedImage original = new BufferedImage(100, 100, BufferedImage.TYPE_3BYTE_BGR); BufferedImage copy = original.getSubimage(10, 10, 50, 50); ImageIO.write(copy, "png", new File("Test.png")); } }