[Netbeans-Java]Embossing,blurring,sharpening

Imam problem pri nalogi:
Datoteko s sliko odprete in jo preberete preko opcije Open menuja File, z uporabo razreda ImageIO, ki podpira nekaj formatov shranjevanja slik. Za prikaz slike uporabite vsebovalnik ploščo (JPanel), v katerega izrišete sliko (Image ali BufferedImage). Program naj ima dodan menu Edit, kjer so dodane tri opcije, s katerimi lahko nad prebrano sliko izvedemo relief (embossing), glajenje (blurring) ali ostrenje (sharpening).

Ne vem kako naj nad prebrano sliko izvedem npr. blurring. Prosim za pomoč.
Koda:

public class Naloga10 extends javax.swing.JFrame {

    /** Creates new form Naloga10 */
    public Naloga10() {
        initComponents();
        


    }

<em>    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        jMenuBar1 = new javax.swing.JMenuBar();
        jMenu1 = new javax.swing.JMenu();
        file1 = new javax.swing.JMenuItem();
        save = new javax.swing.JMenuItem();
        jMenu2 = new javax.swing.JMenu();
        blur = new javax.swing.JMenuItem();
        sharp = new javax.swing.JMenuItem();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jPanel1.setAutoscrolls(true);

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 341, Short.MAX_VALUE)
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGap(0, 334, Short.MAX_VALUE)
        );

        jMenu1.setText("Open");

        file1.setText("File");
        file1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                file1ActionPerformed(evt);
            }
        });
        jMenu1.add(file1);

        save.setText("Save");
        jMenu1.add(save);

        jMenuBar1.add(jMenu1);

        jMenu2.setText("Edit");

        blur.setText("Blurring");
        blur.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                blurActionPerformed(evt);
            }
        });
        jMenu2.add(blur);

        sharp.setText("Sharpen");
        sharp.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                sharpActionPerformed(evt);
            }
        });
        jMenu2.add(sharp);

        jMenuBar1.add(jMenu2);

        setJMenuBar(jMenuBar1);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(86, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(38, 38, 38)
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(55, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold></em>

    private void file1ActionPerformed(java.awt.event.ActionEvent evt) {                                      
        

				if (fc.showOpenDialog(jPanel1) == JFileChooser.APPROVE_OPTION) {
					try {
						img = ImageIO.read(this.fc.getSelectedFile());
						jPanel1.repaint();
					} catch (final Exception e) {
					}
				}
                                jPanel1.repaint();

    }                                     

    private void blurActionPerformed(java.awt.event.ActionEvent evt) {                                     
       
    
    }                                    

    private void sharpActionPerformed(java.awt.event.ActionEvent evt) {
        
        
    }
    

    @Override
        public void update(final Graphics g) {
                    paint(g);
        }
    @Override
        public void paint(final Graphics g) {
		super.paint(g);
                int w=jPanel1.getX()+70;
                int h=jPanel1.getY()+70;
				
		g.drawImage(img,w, h, null);
                        
		
	}
        public void blur() {
            
            float data[] = { 0.0625f, 0.125f, 0.0625f, 0.125f, 0.25f, 0.125f,
                0.0625f, 0.125f, 0.0625f };
            Kernel kernel = new Kernel(3, 3, data);
            ConvolveOp convolve = new ConvolveOp(kernel, ConvolveOp.EDGE_NO_OP,
                null);
            convolve.filter(biSrc, biDest);
            bi = biDest;

        }
        public void sharpen() {
            
            float data[] = { -1.0f, -1.0f, -1.0f, -1.0f, 9.0f, -1.0f, -1.0f, -1.0f,
                -1.0f };
            Kernel kernel = new Kernel(3, 3, data);
            ConvolveOp convolve = new ConvolveOp(kernel, ConvolveOp.EDGE_NO_OP,
                null);
            convolve.filter(biSrc, biDest);
            bi = biDest;
       }


    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new Naloga10().setVisible(true);
            }
        });
    }
    
    BufferedImage biSrc;
    BufferedImage biDest; // Destination image is mandetory.
    BufferedImage bi; // Only an additional reference.
    JFileChooser fc = new JFileChooser();
    BufferedImage img = null;
    // Variables declaration - do not modify
    private javax.swing.JMenuItem blur;
    public javax.swing.JMenuItem file1;
    private javax.swing.JMenu jMenu1;
    private javax.swing.JMenu jMenu2;
    private javax.swing.JMenuBar jMenuBar1;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JMenuItem save;
    private javax.swing.JMenuItem sharp;
    // End of variables declaration

}

Jah,sam nevem kako to v mojo kodo vtaknit(netbeans) . Ne bi celega programa spreminjala, tko da prosim kko "glavco" za pomoč, ker že kar nekaj časa probavam, pa očitno ne kapiram zadeve.

Sem s pomočjo linka zgoraj(hvala nightrage) mi je uspelo narest zdej.
@Spura:ne, nisem 4.letnik in ne obvladam še programiranja(Mogoče čez par let ;)in vem, da se moram še dost naučit).

ah, mi mamo tud tocno to za narest pri uporabniskih vmesnikih :)

Za emboss sem uporabi to metodo: http://www2.java.net/article/2005/12/07...
*dela ok

blur in sharpen pa delam po tem principu: http://www.java2s.com/Code/Java/2D-Grap...
sam dobim error "Exception in thread "AWT-EventQueue-0" java.awt.image.ImagingOpException: Unable to convolve src image"