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import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridLayout;
import java.awt.Image;
import java.awt.MediaTracker;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.image.BandCombineOp;
import java.awt.image.BufferedImage;
import java.awt.image.Raster;
import java.awt.image.WritableRaster;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.border.TitledBorder;
public class CombineApp extends JFrame {
CombinePanel displayPanel;
JButton redBandButton, greenBandButton, blueBandButton, inverseBandButton,
middleBandButton, resetButton;
public CombineApp() {
super("TBandCombineOp");
Container container = getContentPane();
displayPanel = new CombinePanel();
container.add(displayPanel);
JPanel panel = new JPanel();
panel.setLayout(new GridLayout(3, 2));
panel
.setBorder(new TitledBorder(
"Click a Button to Perform the Associated Operation and Reset..."));
redBandButton = new JButton("Show Red Band");
redBandButton.addActionListener(new ButtonListener());
greenBandButton = new JButton("Show Green Band");
greenBandButton.addActionListener(new ButtonListener());
blueBandButton = new JButton("Show Blue Band");
blueBandButton.addActionListener(new ButtonListener());
inverseBandButton = new JButton("Invert All Bands");
inverseBandButton.addActionListener(new ButtonListener());
middleBandButton = new JButton("Average Each Band");
middleBandButton.addActionListener(new ButtonListener());
resetButton = new JButton("Reset");
resetButton.addActionListener(new ButtonListener());
panel.add(redBandButton);
panel.add(blueBandButton);
panel.add(greenBandButton);
panel.add(inverseBandButton);
panel.add(middleBandButton);
panel.add(resetButton);
container.add(BorderLayout.SOUTH, panel);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
setSize(displayPanel.getWidth(), displayPanel.getHeight());
setVisible(true);
}
public static void main(String arg[]) {
new CombineApp();
}
class ButtonListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
JButton button = (JButton) e.getSource();
if (button.equals(redBandButton)) {
displayPanel.bandCombine(CombinePanel.RED_BAND_MATRIX);
displayPanel.repaint();
} else if (button.equals(greenBandButton)) {
displayPanel.bandCombine(CombinePanel.GREEN_BAND_MATRIX);
displayPanel.repaint();
} else if (button.equals(blueBandButton)) {
displayPanel.bandCombine(CombinePanel.BLUE_BAND_MATRIX);
displayPanel.repaint();
} else if (button.equals(inverseBandButton)) {
displayPanel.bandCombine(CombinePanel.INVERSE_BAND_MATRIX);
displayPanel.repaint();
} else if (button.equals(middleBandButton)) {
displayPanel.bandCombine(CombinePanel.AVERAGE_BAND_MATRIX);
displayPanel.repaint();
} else if (button.equals(resetButton)) {
displayPanel.reset();
displayPanel.repaint();
}
}
}
}
class CombinePanel extends JLabel {
// red band Matrix
static final float RED_BAND_MATRIX[][] = { { 1.0f, 0.0f, 0.0f },
{ 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } };
// green band Matrix
static final float GREEN_BAND_MATRIX[][] = { { 0.0f, 0.0f, 0.0f },
{ 0.0f, 1.0f, 0.0f }, { 0.0f, 0.0f, 0.0f } };
// blue band Matrix
static final float BLUE_BAND_MATRIX[][] = { { 0.0f, 0.0f, 0.0f },
{ 0.0f, 0.0f, 0.0f }, { 0.0f, 0.0f, 1.0f } };
// Matrix that inverts all the bands
// the nagative of the image.
static final float INVERSE_BAND_MATRIX[][] = { { -1.0f, 0.0f, 0.0f },
{ 0.0f, -1.0f, 0.0f }, { 0.0f, 0.0f, -1.0f } };
// Matrix that reduces the intensities of all bands
static final float AVERAGE_BAND_MATRIX[][] = { { 0.5f, 0.0f, 0.0f },
{ 0.0f, 0.5f, 0.0f }, { 0.0f, 0.0f, 0.5f } };
Image displayImage;
// The source and destination images
BufferedImage biSrc;
BufferedImage biDest;
// The source and destination rasters
Raster srcRaster;
WritableRaster dstRaster;
BufferedImage bi;
Graphics2D big;
CombinePanel() {
setBackground(Color.black);
loadImage();
setSize(displayImage.getWidth(this), displayImage.getWidth(this));
createBufferedImages();
bi = biSrc;
}
public void loadImage() {
displayImage = Toolkit.getDefaultToolkit().getImage(
"largeJava2sLogo.jpg");
MediaTracker mt = new MediaTracker(this);
mt.addImage(displayImage, 1);
try {
mt.waitForAll();
} catch (Exception e) {
System.out.println("Exception while loading.");
}
if (displayImage.getWidth(this) == -1) {
System.out.println("No jpg) file");
System.exit(0);
}
}
public void createBufferedImages() {
biSrc = new BufferedImage(displayImage.getWidth(this), displayImage
.getHeight(this), BufferedImage.TYPE_INT_RGB);
big = biSrc.createGraphics();
big.drawImage(displayImage, 0, 0, this);
srcRaster = biSrc.getRaster();
biDest = new BufferedImage(displayImage.getWidth(this), displayImage
.getHeight(this), BufferedImage.TYPE_INT_RGB);
dstRaster = (WritableRaster) biDest.getRaster();
}
public void bandCombine(float[][] bandCombineMatrix) {
BandCombineOp bandCombineOp = new BandCombineOp(bandCombineMatrix, null);
bandCombineOp.filter(srcRaster, dstRaster);
bi = biDest;
}
public void reset() {
big.setColor(Color.black);
big.clearRect(0, 0, bi.getWidth(this), bi.getHeight(this));
big.drawImage(displayImage, 0, 0, this);
bi = biSrc;
}
public void update(Graphics g) {
g.clearRect(0, 0, getWidth(), getHeight());
paintComponent(g);
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2D = (Graphics2D) g;
g2D.drawImage(bi, 0, 0, this);
}
}
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