上次的作業答案：
原本程式碼為
import javax.swing.Timer;
import java.awt.event.*;
import java.util.*;
public class TimerDemo implements ActionListener {
Timer t = new Timer(1000,this);
TimerDemo() {
t.start();
}
public static void main(String args[]) {
TimerDemo td = new TimerDemo();
// create a dummy frame to keep the JVM running
// (for demonstation purpose)
java.awt.Frame dummy = new java.awt.Frame();
dummy.setVisible(true);
}
public void actionPerformed(ActionEvent e) {
if (e.getSource() == t) {
System.out.println
("\007Being ticked " + Calendar.getInstance().getTime());
}
}
}
修改過後為：
import javax.swing.Timer;
import java.awt.event.*;
import java.util.*;
import java.awt.*;
import javax.swing.*;
public class TimerDemo extends JFrame implements ActionListener {
Timer t = new Timer(1000,this);
static JTextField tbx1=new JTextField(20);
TimerDemo() {
t.start();
}
public static void main(String args[]) {
TimerDemo td = new TimerDemo();
FlowLayout flow=new FlowLayout();
td.setLayout(flow);
td.setSize(450,150);
JPanel p1 = new JPanel(flow);
td.add(p1);
p1.add(tbx1);
td.setVisible(true);
}
public void actionPerformed(ActionEvent e) {
if (e.getSource() == t) {
tbx1.setText("" + Calendar.getInstance().getTime());
}
}
}
之後下載ip-demo2.zip的壓縮檔案以及negun3276.tif
此為別人設計的具修改圖片功能的套件
作業：將裡面的IPDemo.java其中一個功能(例如雜訊)不用靠按鍵就顯示出來，
並把所有的按鍵去除
IPDemo.java原程式碼：
import ij.*;
import java.applet.*;
import java.awt.*;
import ij.process.*;
/**Simple applet that demonstrates how to use ImageJ's ImageProcessor class.*/
public class IPDemo extends Applet {
String name;
Image img;
ImageProcessor ip = null;
public void init() {
setLayout(new BorderLayout());
Panel p = new Panel();
p.setLayout(new GridLayout(5, 3));
p.add(new Button("Reset"));
p.add(new Button("Flip"));
p.add(new Button("Invert"));
p.add(new Button("Lighten"));
p.add(new Button("Darken"));
p.add(new Button("Rotate"));
p.add(new Button("Zoom In"));
p.add(new Button("Zoom Out"));
p.add(new Button("Threshsold"));
p.add(new Button("Smooth"));
p.add(new Button("Sharpen"));
p.add(new Button("Find Edges"));
p.add(new Button("Macro 1"));
p.add(new Button("Macro 2"));
p.add(new Button("Add Noise"));
add("South", p);
name = getParameter("img");
img = getImage(getDocumentBase(), name);
MediaTracker tracker = new MediaTracker(this);
tracker.addImage(img, 0);
try {tracker.waitForID(0);}
catch (InterruptedException e){}
if (name.endsWith("jpg"))
ip = new ColorProcessor(img);
else
ip = new ByteProcessor(img);
ip.snapshot();
}
public void update(Graphics g) {
paint(g);
}
public void paint(Graphics g) {
g.drawImage(img, 0, 0, this);
}
public boolean action(Event e, Object arg) {
if (e.target instanceof Button) {
String label = (String)arg;
if (label.equals("Reset"))
ip.reset();
else if (label.equals("Flip"))
ip.flipVertical();
else if (label.equals("Invert"))
ip.invert();
else if (label.equals("Lighten"))
ip.multiply(0.9);
else if (label.equals("Darken"))
ip.multiply(1.1);
else if (label.equals("Rotate"))
ip.rotate(30);
else if (label.equals("Zoom In"))
ip.scale(1.2, 1.2);
else if (label.equals("Zoom Out"))
ip.scale(0.8, 0.8);
else if (label.equals("Threshsold"))
ip.autoThreshold();
else if (label.equals("Smooth"))
ip.smooth();
else if (label.equals("Sharpen"))
ip.sharpen();
else if (label.equals("Find Edges"))
ip.findEdges();
else if (label.equals("Macro 1"))
macro1();
else if (label.equals("Macro 2"))
macro2();
else if (label.equals("Add Noise"))
ip.noise(20);
img = ip.createImage();
repaint();
return true;
}
return false;
}
void updateAndDraw() {
img.flush();
img = ip.createImage();
getGraphics().drawImage(img, 0, 0, this);
}
void macro1() {
for (int i=10; i<=360; i+=10) {
ip.reset();
ip.rotate(i);
updateAndDraw();
}
}
void macro2() {
double scale = 1, m = 1.2;
for (int i=0; i<20; i++) {
ip.reset();
scale *= m;
ip.scale(scale, scale);
updateAndDraw();
}
for (int i=0; i <20; i++) {
ip.reset();
scale /= m;
ip.scale(scale, scale);
updateAndDraw();
}
}
}
修改後程式碼：(為了讓雜訊更為明顯，將20改成100)
import ij.*;
import java.applet.*;
import java.awt.*;
import ij.process.*;
/**Simple applet that demonstrates how to use ImageJ's ImageProcessor class.*/
public class IPDemo extends Applet {
String name;
Image img;
ImageProcessor ip = null;
public void init() {
setLayout(new BorderLayout());
Panel p = new Panel();
/* p.setLayout(new GridLayout(5, 3));
p.add(new Button("Reset"));
p.add(new Button("Flip"));
p.add(new Button("Invert"));
p.add(new Button("Lighten"));
p.add(new Button("Darken"));
p.add(new Button("Rotate"));
p.add(new Button("Zoom In"));
p.add(new Button("Zoom Out"));
p.add(new Button("Threshsold"));
p.add(new Button("Smooth"));
p.add(new Button("Sharpen"));
p.add(new Button("Find Edges"));
p.add(new Button("Macro 1"));
p.add(new Button("Macro 2"));
*/
add("South", p);
name = getParameter("img");
img = getImage(getDocumentBase(), name);
MediaTracker tracker = new MediaTracker(this);
tracker.addImage(img, 0);
try {tracker.waitForID(0);}
catch (InterruptedException e){}
if (name.endsWith("jpg"))
ip = new ColorProcessor(img);
else
ip = new ByteProcessor(img);
ip.noise(100);
img = ip.createImage();
repaint();
ip.snapshot();
}
public void update(Graphics g) {
paint(g);
}
public void paint(Graphics g) {
g.drawImage(img, 0, 0, this);
}
public boolean action(Event e, Object arg) {
if (e.target instanceof Button) {
String label = (String)arg;
if (label.equals("Reset"))
ip.reset();
else if (label.equals("Flip"))
ip.flipVertical();
else if (label.equals("Invert"))
ip.invert();
else if (label.equals("Lighten"))
ip.multiply(1.1);
else if (label.equals("Darken"))
ip.multiply(0.9);
else if (label.equals("Rotate"))
ip.rotate(30);
else if (label.equals("Zoom In"))
ip.scale(1.2, 1.2);
else if (label.equals("Zoom Out"))
ip.scale(0.8, 0.8);
else if (label.equals("Threshsold"))
ip.autoThreshold();
else if (label.equals("Smooth"))
ip.smooth();
else if (label.equals("Sharpen"))
ip.sharpen();
else if (label.equals("Find Edges"))
ip.findEdges();
else if (label.equals("Macro 1"))
macro1();
else if (label.equals("Macro 2"))
macro2();
img = ip.createImage();
repaint();
return true;
}
return false;
}
void updateAndDraw() {
img.flush();
img = ip.createImage();
getGraphics().drawImage(img, 0, 0, this);
}
void macro1() {
for (int i=10; i<=360; i+=10) {
ip.reset();
ip.rotate(i);
updateAndDraw();
}
}
void macro2() {
double scale = 1, m = 1.2;
for (int i=0; i<20; i++) {
ip.reset();
scale *= m;
ip.scale(scale, scale);
updateAndDraw();
}
for (int i=0; i <20; i++) {
ip.reset();
scale /= m;
ip.scale(scale, scale);
updateAndDraw();
}
}
}
