Java tutorial
import java.awt.image.BufferedImage; import java.awt.image.BufferedImageOp; import java.awt.image.ConvolveOp; import java.awt.image.Kernel; public class Main { public static void main(String[] argv) throws Exception { BufferedImage bufferedImage = new BufferedImage(200, 200, BufferedImage.TYPE_BYTE_INDEXED); Kernel kernel = new Kernel(3, 3, new float[] { -1, -1, -1, -1, 9, -1, -1, -1, -1 }); BufferedImageOp op = new ConvolveOp(kernel); bufferedImage = op.filter(bufferedImage, null); } }