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/**
* @version 1.0 1999-09-12
* @author Cay Horstmann
*/
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Graphics2D;
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.geom.AffineTransform;
import java.awt.image.AffineTransformOp;
import java.awt.image.BufferedImage;
import java.awt.image.BufferedImageOp;
import java.awt.image.ByteLookupTable;
import java.awt.image.ConvolveOp;
import java.awt.image.Kernel;
import java.awt.image.LookupOp;
import java.awt.image.RescaleOp;
import java.io.File;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
public class ImageProcessingTest {
public static void main(String[] args) {
JFrame frame = new ImageProcessingFrame();
frame.show();
}
}
class ImageProcessingFrame extends JFrame implements ActionListener {
public ImageProcessingFrame() {
setTitle("ImageProcessingTest");
setSize(300, 400);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
Container contentPane = getContentPane();
panel = new ImageProcessingPanel();
contentPane.add(panel, "Center");
JMenu fileMenu = new JMenu("File");
openItem = new JMenuItem("Open");
openItem.addActionListener(this);
fileMenu.add(openItem);
exitItem = new JMenuItem("Exit");
exitItem.addActionListener(this);
fileMenu.add(exitItem);
JMenu editMenu = new JMenu("Edit");
blurItem = new JMenuItem("Blur");
blurItem.addActionListener(this);
editMenu.add(blurItem);
sharpenItem = new JMenuItem("Sharpen");
sharpenItem.addActionListener(this);
editMenu.add(sharpenItem);
brightenItem = new JMenuItem("Brighten");
brightenItem.addActionListener(this);
editMenu.add(brightenItem);
edgeDetectItem = new JMenuItem("Edge detect");
edgeDetectItem.addActionListener(this);
editMenu.add(edgeDetectItem);
negativeItem = new JMenuItem("Negative");
negativeItem.addActionListener(this);
editMenu.add(negativeItem);
rotateItem = new JMenuItem("Rotate");
rotateItem.addActionListener(this);
editMenu.add(rotateItem);
JMenuBar menuBar = new JMenuBar();
menuBar.add(fileMenu);
menuBar.add(editMenu);
setJMenuBar(menuBar);
}
public void actionPerformed(ActionEvent evt) {
Object source = evt.getSource();
if (source == openItem) {
JFileChooser chooser = new JFileChooser();
chooser.setCurrentDirectory(new File("."));
chooser.setFileFilter(new javax.swing.filechooser.FileFilter() {
public boolean accept(File f) {
String name = f.getName().toLowerCase();
return name.endsWith(".gif") || name.endsWith(".jpg")
|| name.endsWith(".jpeg") || f.isDirectory();
}
public String getDescription() {
return "Image files";
}
});
int r = chooser.showOpenDialog(this);
if (r == JFileChooser.APPROVE_OPTION) {
String name = chooser.getSelectedFile().getAbsolutePath();
panel.loadImage(name);
}
} else if (source == exitItem)
System.exit(0);
else if (source == blurItem)
panel.blur();
else if (source == sharpenItem)
panel.sharpen();
else if (source == brightenItem)
panel.brighten();
else if (source == edgeDetectItem)
panel.edgeDetect();
else if (source == negativeItem)
panel.negative();
else if (source == rotateItem)
panel.rotate();
}
private ImageProcessingPanel panel;
private JMenuItem openItem;
private JMenuItem exitItem;
private JMenuItem blurItem;
private JMenuItem sharpenItem;
private JMenuItem brightenItem;
private JMenuItem edgeDetectItem;
private JMenuItem negativeItem;
private JMenuItem rotateItem;
}
class ImageProcessingPanel extends JPanel {
public void paintComponent(Graphics g) {
super.paintComponent(g);
if (image != null)
g.drawImage(image, 0, 0, null);
}
public void loadImage(String name) {
Image loadedImage = Toolkit.getDefaultToolkit().getImage(name);
MediaTracker tracker = new MediaTracker(this);
tracker.addImage(loadedImage, 0);
try {
tracker.waitForID(0);
} catch (InterruptedException e) {
}
image = new BufferedImage(loadedImage.getWidth(null), loadedImage
.getHeight(null), BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = image.createGraphics();
g2.drawImage(loadedImage, 0, 0, null);
repaint();
}
private void filter(BufferedImageOp op) {
BufferedImage filteredImage = new BufferedImage(image.getWidth(), image
.getHeight(), image.getType());
op.filter(image, filteredImage);
image = filteredImage;
repaint();
}
private void convolve(float[] elements) {
Kernel kernel = new Kernel(3, 3, elements);
ConvolveOp op = new ConvolveOp(kernel);
filter(op);
}
public void blur() {
float weight = 1.0f / 9.0f;
float[] elements = new float[9];
for (int i = 0; i < 9; i++)
elements[i] = weight;
convolve(elements);
}
public void sharpen() {
float[] elements = { 0.0f, -1.0f, 0.0f, -1.0f, 5.f, -1.0f, 0.0f, -1.0f,
0.0f };
convolve(elements);
}
void edgeDetect() {
float[] elements = { 0.0f, -1.0f, 0.0f, -1.0f, 4.f, -1.0f, 0.0f, -1.0f,
0.0f };
convolve(elements);
}
public void brighten() {
float a = 1.5f;
float b = -20.0f;
RescaleOp op = new RescaleOp(a, b, null);
filter(op);
}
void negative() {
byte negative[] = new byte[256];
for (int i = 0; i < 256; i++)
negative[i] = (byte) (255 - i);
ByteLookupTable table = new ByteLookupTable(0, negative);
LookupOp op = new LookupOp(table, null);
filter(op);
}
void rotate() {
AffineTransform transform = AffineTransform.getRotateInstance(Math
.toRadians(5), image.getWidth() / 2, image.getHeight() / 2);
AffineTransformOp op = new AffineTransformOp(transform,
AffineTransformOp.TYPE_BILINEAR);
filter(op);
}
private BufferedImage image;
}
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