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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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package java2d.demos.Images;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.AffineTransform;
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 java2d.ControlsSurface;
import java2d.CustomControls;
import javax.swing.JComboBox;
import javax.swing.JSlider;
import javax.swing.SwingConstants;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
/**
* Images drawn using operators such as ConvolveOp LowPass & Sharpen,
* LookupOp and RescaleOp.
*/
@SuppressWarnings("serial")
public class ImageOps extends ControlsSurface implements ChangeListener {
protected JSlider slider1, slider2;
private static final String[] imgName = { "bld.jpg", "boat.png" };
private static final BufferedImage[] img = new BufferedImage[imgName.length];
private static final String[] opsName = {
"Threshold", "RescaleOp", "Invert", "Yellow Invert", "3x3 Blur",
"3x3 Sharpen", "3x3 Edge", "5x5 Edge" };
private static final BufferedImageOp[] biop =
new BufferedImageOp[opsName.length];
private static int rescaleFactor = 128;
private static float rescaleOffset = 0;
private static final int low = 100, high = 200;
private int opsIndex, imgIndex;
static {
thresholdOp(low, high);
int i = 1;
biop[i++] = new RescaleOp(1.0f, 0, null);
byte[] invert = new byte[256];
byte[] ordered = new byte[256];
for (int j = 0; j < 256; j++) {
invert[j] = (byte) (256 - j);
ordered[j] = (byte) j;
}
biop[i++] = new LookupOp(new ByteLookupTable(0, invert), null);
byte[][] yellowInvert = new byte[][] { invert, invert, ordered };
biop[i++] = new LookupOp(new ByteLookupTable(0, yellowInvert), null);
int[][] dim = { { 3, 3 }, { 3, 3 }, { 3, 3 }, { 5, 5 } };
float[][] data = { { 0.1f, 0.1f, 0.1f, // 3x3 blur
0.1f, 0.2f, 0.1f,
0.1f, 0.1f, 0.1f },
{ -1.0f, -1.0f, -1.0f, // 3x3 sharpen
-1.0f, 9.0f, -1.0f,
-1.0f, -1.0f, -1.0f },
{ 0.f, -1.f, 0.f, // 3x3 edge
-1.f, 5.f, -1.f,
0.f, -1.f, 0.f },
{ -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, // 5x5 edge
-1.0f, -1.0f, -1.0f, -1.0f, -1.0f,
-1.0f, -1.0f, 24.0f, -1.0f, -1.0f,
-1.0f, -1.0f, -1.0f, -1.0f, -1.0f,
-1.0f, -1.0f, -1.0f, -1.0f, -1.0f } };
for (int j = 0; j < data.length; j++, i++) {
biop[i] = new ConvolveOp(new Kernel(dim[j][0], dim[j][1], data[j]));
}
}
@SuppressWarnings("LeakingThisInConstructor")
public ImageOps() {
setDoubleBuffered(true);
setBackground(Color.white);
for (int i = 0; i < imgName.length; i++) {
Image image = getImage(imgName[i]);
int iw = image.getWidth(this);
int ih = image.getHeight(this);
img[i] = new BufferedImage(iw, ih, BufferedImage.TYPE_INT_RGB);
img[i].createGraphics().drawImage(image, 0, 0, null);
}
slider1 = new JSlider(SwingConstants.VERTICAL, 0, 255, low);
slider1.setPreferredSize(new Dimension(15, 100));
slider1.addChangeListener(this);
slider2 = new JSlider(SwingConstants.VERTICAL, 0, 255, high);
slider2.setPreferredSize(new Dimension(15, 100));
slider2.addChangeListener(this);
setControls(new Component[] { new DemoControls(this), slider1, slider2 });
setConstraints(new String[] {
BorderLayout.NORTH, BorderLayout.WEST, BorderLayout.EAST });
}
public static void thresholdOp(int low, int high) {
byte[] threshold = new byte[256];
for (int j = 0; j < 256; j++) {
if (j > high) {
threshold[j] = (byte) 255;
} else if (j < low) {
threshold[j] = (byte) 0;
} else {
threshold[j] = (byte) j;
}
}
biop[0] = new LookupOp(new ByteLookupTable(0, threshold), null);
}
@Override
public void render(int w, int h, Graphics2D g2) {
int iw = img[imgIndex].getWidth(null);
int ih = img[imgIndex].getHeight(null);
AffineTransform oldXform = g2.getTransform();
g2.scale(((double) w) / iw, ((double) h) / ih);
g2.drawImage(img[imgIndex], biop[opsIndex], 0, 0);
g2.setTransform(oldXform);
}
@Override
public void stateChanged(ChangeEvent e) {
if (e.getSource().equals(slider1)) {
if (opsIndex == 0) {
thresholdOp(slider1.getValue(), high);
} else {
rescaleFactor = slider1.getValue();
biop[1] = new RescaleOp(rescaleFactor / 128.0f, rescaleOffset,
null);
}
} else {
if (opsIndex == 0) {
thresholdOp(low, slider2.getValue());
} else {
rescaleOffset = slider2.getValue();
biop[1] = new RescaleOp(rescaleFactor / 128.0f, rescaleOffset,
null);
}
}
repaint();
}
public static void main(String[] s) {
createDemoFrame(new ImageOps());
}
static class DemoControls extends CustomControls implements ActionListener {
ImageOps demo;
JComboBox imgCombo, opsCombo;
Font font = new Font(Font.SERIF, Font.PLAIN, 10);
@SuppressWarnings("LeakingThisInConstructor")
public DemoControls(ImageOps demo) {
super(demo.name);
this.demo = demo;
add(imgCombo = new JComboBox());
imgCombo.setFont(font);
for (String name : ImageOps.imgName) {
imgCombo.addItem(name);
}
imgCombo.addActionListener(this);
add(opsCombo = new JComboBox());
opsCombo.setFont(font);
for (String name : ImageOps.opsName) {
opsCombo.addItem(name);
}
opsCombo.addActionListener(this);
}
@Override
public void actionPerformed(ActionEvent e) {
if (e.getSource().equals(opsCombo)) {
demo.opsIndex = opsCombo.getSelectedIndex();
if (demo.opsIndex == 0) {
demo.slider1.setValue(ImageOps.low);
demo.slider2.setValue(ImageOps.high);
demo.slider1.setEnabled(true);
demo.slider2.setEnabled(true);
} else if (demo.opsIndex == 1) {
demo.slider1.setValue(ImageOps.rescaleFactor);
demo.slider2.setValue((int) ImageOps.rescaleOffset);
demo.slider1.setEnabled(true);
demo.slider2.setEnabled(true);
} else {
demo.slider1.setEnabled(false);
demo.slider2.setEnabled(false);
}
} else if (e.getSource().equals(imgCombo)) {
demo.imgIndex = imgCombo.getSelectedIndex();
}
demo.repaint(10);
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 39);
}
@Override
@SuppressWarnings("SleepWhileHoldingLock")
public void run() {
try {
Thread.sleep(1111);
} catch (Exception e) {
return;
}
Thread me = Thread.currentThread();
/**代码未完, 请加载全部代码(NowJava.com).**/