Show Image Effect

This section shows you image effects.

To show Image effects, we have defined three matrix: RED_MATRIX, GREEN_MATRIX, BLUE_MATRIX which shows colors:

static final float RED_MATRIX[][] = { { 2.0f, 0.0f, 0.0f },
{ 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } };
static final float GREEN_MATRIX[][] = { { 0.0f, 0.0f, 0.0f },
{ 0.0f, 2.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } };
static final float BLUE_MATRIX[][] = { { 0.0f, 0.0f, 0.0f },
{ 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 2.0f } };

We have used four radio buttons to perform different functions by calling ActionListener class. The getDefaultToolkit() method of Toolkit class provides the default toolkit. The method getImage() of class ToolKit returns an image.

The MediaTracker class provides a media objects including images. Create an instance of MediaTracker and call addImage() method which adds the specified image. The method waitForAll() of this class loads the image which is added.

The Raster class provides an array of pixels which store the values and locate the value in Databuffer. The BandCombineOp class provides a linear combination of the bands in a Raster with specified matrix.

Here is the code of ImageEffectExample.java


import java.awt.*;

import java.awt.event.*;

import java.awt.image.*;

import javax.swing.*;

import javax.swing.border.TitledBorder;



public class ImageEffectExample extends JFrame {

  ShowPanel spanel;

  JRadioButton button1, button2, button3, button4;



  public ImageEffectExample() {

    super("Show Image Effects");

    Container container = getContentPane();

    spanel = new ShowPanel();

    container.add(spanel);

    JPanel panel = new JPanel();

    panel.setLayout(new GridLayout(2, 2));

    panel.setBorder(new TitledBorder("select"));

  ButtonGroup group=new ButtonGroup();



    button1 = new JRadioButton("Show Image Red");

  panel.add(button1);

  group.add(button1);

    button1.addActionListener(new ButtonListener());



    button2 = new JRadioButton("Show Image Green");

  panel.add(button2);

  group.add(button2);

    button2.addActionListener(new ButtonListener());



    button3 = new JRadioButton("Show Image Blue");

  panel.add(button3);

  group.add(button3);

    button3.addActionListener(new ButtonListener());



    button4 = new JRadioButton("Reset");

  panel.add(button4);

  group.add(button4);

    button4.addActionListener(new ButtonListener());

    container.add(BorderLayout.NORTH, panel);



    addWindowListener(new WindowAdapter() {

      public void windowClosing(WindowEvent e) {

        System.exit(0);

      }

    });

  setSize(350,200);

    setVisible(true);

  }

    public static void main(String args[]) {

    new ImageEffectExample();

  }

    class ButtonListener implements ActionListener {

    public void actionPerformed(ActionEvent e) {

      JRadioButton button = (JRadioButton) e.getSource();

      if (button.equals(button1)) {

        spanel.combine(ShowPanel.RED_MATRIX);

        spanel.repaint();

      } else if (button.equals(button2)) {

        spanel.combine(ShowPanel.GREEN_MATRIX);

        spanel.repaint();

      } else if (button.equals(button3)) {

        spanel.combine(ShowPanel.BLUE_MATRIX);

        spanel.repaint();

      } else if (button.equals(button4)) {

        spanel.reset();

        spanel.repaint();

      }

    }

  }

}

class ShowPanel extends JLabel {

  static final float RED_MATRIX[][] = { { 2.0f, 0.0f, 0.0f },

      { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } };

  static final float GREEN_MATRIX[][] = { { 0.0f, 0.0f, 0.0f },

      { 0.0f, 2.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } };

  static final float BLUE_MATRIX[][] = { { 0.0f, 0.0f, 0.0f },

      { 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 2.0f } };

Image image;

BufferedImage bufferedImage1;

BufferedImage bufferedImage2;

Raster raster;

WritableRaster writableRaster;

BufferedImage bufferedImage;

Graphics2D g2d;



ShowPanel() {

    loadImage();

    setSize(image.getWidth(this), image.getWidth(this));

    createImages();

    bufferedImage = bufferedImage1;

  }

  public void loadImage() {

    image = Toolkit.getDefaultToolkit().getImage("alert.gif");

    MediaTracker mediaTracker = new MediaTracker(this);

    mediaTracker.addImage(image, 1);

    try {

      mediaTracker.waitForAll();

    } catch (Exception e) {}

    }



  public void createImages() {

    bufferedImage1 = new BufferedImage(image.getWidth(this), image

    .getHeight(this), BufferedImage.TYPE_INT_RGB);

    g2d = bufferedImage1.createGraphics();

    g2d.drawImage(image, 0, 0, this);

    raster = bufferedImage1.getRaster();

    bufferedImage2 = new BufferedImage(image.getWidth(this), image

        .getHeight(this), BufferedImage.TYPE_INT_RGB);

    writableRaster = (WritableRaster) bufferedImage2.getRaster();

  }

    public void combine(float[][] combineMatrix) {

    BandCombineOp band = new BandCombineOp(combineMatrix, null);

    band.filter(raster, writableRaster);

    bufferedImage = bufferedImage2;

  }

 public void reset() {

    g2d.setColor(Color.black);

    g2d.clearRect(0, 0, bufferedImage.getWidth(this), bufferedImage.

       getHeight(this));

    g2d.drawImage(image, 0, 0, this);

    bufferedImage = bufferedImage1;

  }

    public void paintComponent(Graphics g) {

    super.paintComponent(g);

    Graphics2D g2D = (Graphics2D) g;

    g2D.drawImage(bufferedImage, 0, 0, this);

  }

}

Output will be displayed as:

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