Re: [問題]java做影像處理的參考資料?
我也來分享一下以前寫的 code 好了
1. 程式由 FileChooser 讀路徑
2. ImageIO 把圖檔讀進 BufferedImage
3. 由 BufferedImage 取出影像陣列做處理
4. 把陣列轉回 Image 顯示
其中 4. 有二種作法
第二種是最近在 "電腦王" 雜誌上看到再新加的
大家可以參考一下
影像處理我還是推薦用 OpenCV 啦
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.io.*;
import javax.swing.*;
import javax.imageio.*;
public class ImgProcessFrame extends JFrame implements ActionListener{
JLabel status; // status bar
JButton btn_browse, btn_process;
JScrollPane pane_left, pane_right;
JFileChooser chooser;
String imgPath = null;
JLabel img_left, img_right;
public ImgProcessFrame(){
super("Image Process Frame");
// GUI
JLabel lbl_browse = new JLabel("Choose Image:");
btn_browse = new JButton("Browse");
btn_browse.addActionListener(this);
btn_process = new JButton("Process");
btn_process.addActionListener(this);
JPanel upPanel = new JPanel(); // default: flow layout
upPanel.add(lbl_browse);
upPanel.add(btn_browse);
upPanel.add(btn_process);
pane_left = new JScrollPane();
pane_left.setColumnHeaderView(new JLabel("Input Image"));
pane_right = new JScrollPane();
pane_right.setColumnHeaderView(new JLabel("Output Image"));
JPanel ctrPanel = new JPanel(new GridLayout(1,2));
ctrPanel.add(pane_left);
ctrPanel.add(pane_right);
status = new JLabel("Status");
Container contentPane = getContentPane();// default: border layout
contentPane.add(upPanel, BorderLayout.NORTH);
contentPane.add(ctrPanel, BorderLayout.CENTER);
contentPane.add(status, BorderLayout.SOUTH);
// File chooser
chooser = new JFileChooser();
//chooser.addChoosableFileFilter(new ImageFilter());
//chooser.setAcceptAllFileFilterUsed(false);
//chooser.setAccessory(new ImagePreview(chooser));
img_left = new JLabel();
img_right = new JLabel();
// JFrame parameter
setDefaultCloseOperation(EXIT_ON_CLOSE);
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
setBounds(20,20,screenSize.width-100,screenSize.height-100);
setVisible(true);
}
public void actionPerformed(ActionEvent e){
// Get image
if(e.getSource()==btn_browse){
int result = chooser.showOpenDialog(this);
if(result == JFileChooser.APPROVE_OPTION){
try{
File fileObj = chooser.getSelectedFile();
imgPath = fileObj.getPath();
// display original image
BufferedImage bfImg = ImageIO.read(new File(imgPath));
img_left.setIcon( new ImageIcon(bfImg) );
pane_left.setViewportView( img_left );
status.setText(" Image loaded " + fileObj.getPath());
}catch(IOException ioe){
ioe.printStackTrace();
}
}
}
// Process image
else if(e.getSource()==btn_process){
if(imgPath != null){
try{
BufferedImage bfImg = ImageIO.read(new File(imgPath));
int imgW = bfImg.getWidth();
int imgH = bfImg.getHeight();
int pixIn[] = new int[imgW*imgH];
bfImg.getRGB(0,0,imgW,imgH,pixIn,0,imgW);
process(pixIn,imgW,imgH);
// 建立 Image 的方法 1. Component.createImage
/*Image img = createImage(
new MemoryImageSource(imgW, imgH, pixIn, 0, imgW));*/
// 建立 Image 的方法 2. 直接建立 BufferedImage
BufferedImage img = CreateBufferedImage_Direct(pixIn,imgW,imgH);
img_right.setIcon(new ImageIcon(img));
pane_right.setViewportView( img_right );
}catch(IOException ioe){
ioe.printStackTrace();
}
}else{
status.setText(" Image not yet loaded");
}
}
}
// 處理影像的部分
public void process(int p[], int w, int h){
int r, g, b;
for(int col=0; col<h-1; col++){
for(int row=0; row<w-1; row++){
r = (p[col*w+row] & 0xFF0000)>>16;
g = (p[col*w+row] & 0xFF00)>>8;
b = (p[col*w+row] & 0xFF);
int mean = (r+g+b)/3;
p[col*w+row] = 0xff000000 | mean<<16 | mean<<8 | mean; // 0xff0
00000 代表 alpha
}
}
}
public static BufferedImage CreateBufferedImage_Direct(int rgbData[], int widt
h, int height){
// 建立 DataBuffer
DataBuffer db = new DataBufferInt(rgbData,width*height);
// 建立 Raster(包含 DataBuffer, SampleModel), 其中 SampleModel 自動用 SingleP
ixelPackedSampleModel
WritableRaster raster = Raster.createPackedRaster(db, width, height, width,
new int[]{0xff0000,0x00ff00,0xff}, null);
// 建立 ColorModel
ColorModel cm = new DirectColorModel(24, 0xff0000, 0x00ff00, 0xff);
// BufferedImage consists of 1. ColorModel, 2. Raster
return new BufferedImage(cm, raster, false, null);
}
public static void main(String args[]){
JFrame.setDefaultLookAndFeelDecorated(true);
JDialog.setDefaultLookAndFeelDecorated(true);
ImgProcessFrame ef = new ImgProcessFrame();
}
}
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