IplImage in JPanel, JLabel

[Menegussi]

Hi all,

I need to develop an application using a MVC Design Pattern.

My doubt is how to insert the IplImage inside of JLabel or JPanel,
because i always, until now, work with CanvasFrame do display de
Images.

I saw some examples but i did not understood because i dont have
experience with GUI in JAVA.

Can you help me, urgently.

Menegussi

[Samuel Audet]

Just call IplImage.getBufferedImage(), it will return a java.awt.Image
you can use with JLabel or whatever you use those Image objects for

Samuel

[André Menegussi]

Hi Samuel,

 

My MVC design pattern is almost ready. Only the view is not ready!

 

Sorry my lack of knowledge but i never worked with java GUI.

So, can you give me a snippet code from how to do that?

 

Bellow is my View code:

 

import com.googlecode.javacv.cpp.opencv_core.IplImage;

.

.

. some imports

 

public class View implements ActionListener, Observer {

 

 private Subject model;
 private Controller buttonsManager;
 
 
 JFrame tela; //tela principal
 
 JPanel panelBotoes1;
 JPanel panelDados1;

 JButton ligar;
 JButton desligar;

 

 JLabel labelTemp;
  
 
 public View(Subject mo, Controller co) {
  this.model = mo;
  this.buttonsManager = co;
 }
 
 //criação da view
 public void createView(){
  

  tela = new JFrame("Motion Detection");
  tela.setSize(800, 600);
  tela.setVisible(true);
  tela.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  
  
  panelBotoes1 = new JPanel();
  
  panelDados1 = new JPanel();
  
  ligar = new JButton("Ligar");
  desligar = new JButton("Desligar");
  labelTemp = new JLabel();
  
  ligar.addActionListener(this);
  desligar.addActionListener(this);
  
  panelBotoes1.add(ligar);
  panelBotoes1.add(desligar);
  panelBotoes1.setBackground(Color.green);
  
  panelDados1.add(labelTemp); 
  tela.add(panelBotoes1);
  tela.add(panelDados1);
 
  
  tela.getContentPane().add(BorderLayout.SOUTH, panelBotoes1);
  
  tela.getContentPane().add(BorderLayout.NORTH, panelDados1);
  
  tela.setVisible(true);
  
 }

 //--------------------------------------------

 

 @Override
 public void update(IplImage frame) { // here is my update from the IplImage.....
 

 // TODO Auto-generated method stub
 System.out.println("fiz o update (VIEW)  -------------------------------------------------------------------------"); 
  

--- I dont know what to do  here.......

 

frame.getBufferedImage();
 

labelTemp.add(frame.getBufferedImage());
 

------------------------------------------------
 } 
  
 //--------- Controle de Mouse
 @Override

 public void actionPerformed(ActionEvent event) {
  // TODO Auto-generated method stub
  
  if (event.getSource() == ligar){
   this.buttonsManager.controlaBotoes(true);
   System.out.println("pressionei o iniciar");
 }
  if (event.getSource() == desligar){
   this.buttonsManager.controlaBotoes(false);
   System.out.println("pressionei o parar");
 }

 }
 

}

 Help me, please :)

 

André Menegussi

 

 

2011/11/28 Samuel Audet <samuel...@gmail.com>

[Samuel Audet]

On 2011-11-29 11:16, Andr� Menegussi wrote:
> Hi Samuel,
> My MVC design pattern is almost ready. Only the view is not ready!
> Sorry my lack of knowledge but i never worked with java GUI.
> So, can you give me a snippet code from how to do that?
> Bellow is my View code:
> import com.googlecode.javacv.cpp.opencv_core.IplImage;

Well if you want to display the image in a JLabel, for example, we can call:
new JLabel(new ImageIcon(IplImage.getBufferedImage())

Samuel

[André Menegussi]

Ok, but if i update continously this jLabel can I make the new ImageIcon every time without "eat" memory?

 

Thanks!!

2011/11/29 Samuel Audet <samuel...@gmail.com>

[André Menegussi]

Hi Samuel, another thing:

 

I wanna use the same  JLabel (labelTemp), but i dont know how to pass every time the new image to the labelTemp.

 

Can you help again?

 

Sorry about my poor knowloge!

 

André Menegussi

2011/11/29 André Menegussi <amene...@gmail.com>

[André Menegussi]

Samuel,

 

Now i can put de IplImage inside a JLabel, but tuo put a sequence of image (video stream from webcam) dont works, i'm making something wrong?

 

 

2011/11/29 André Menegussi <amene...@gmail.com>

[André Menegussi]

Hi Samuel,

 

I'm again!!

 

How could i update the JLabel with news frames grabbed from the webcam? I tried to use the commands:

 

ImageIcon quadro = new ImageIcon( frame.getBufferedImage());

 

labelTemp.setIcon(quadro);   //new ImageIcon( frame.getBufferedImage()));

 labelTemp.repaint();

But dont works.

 

I dont know how to do that! :)

 

Somebody has a idea?

 

Thanks

 

2011/11/29 André Menegussi <amene...@gmail.com>

[Samuel Audet]

Just following the tutorial here:
http://docs.oracle.com/javase/tutorial/2d/images/drawimage.html

Samuel

On 2011-11-30 03:28, Andr� Menegussi wrote:
> Hi Samuel,
> I'm again!!
> How could i update the JLabel with news frames grabbed from the webcam?
> I tried to use the commands:

> *ImageIcon quadro = new*ImageIcon( frame.getBufferedImage());

[Samuel Audet]

On 2012-09-24 06:53, Raamon Paiva wrote:
> Did you found the solution to your problem? I have the issue...

Try something similar to what they explain here:
http://docs.oracle.com/javase/tutorial/2d/images/drawimage.html

Samuel

[Srijit Chandrashekhar Nair]

The below code works for me

public class CameraPanel extends JPanel {

private static final long serialVersionUID = 1L;

public JFrame parentWindow;

BufferedImage img = null;

public CameraPanel(JFrame parentWindow){

this.parentWindow = parentWindow;

}

public void displayImage(IplImage img){

this.img=img.getBufferedImage(); 

repaint();

}

@Override

protected void paintComponent(Graphics g) {

Graphics2D g2 = (Graphics2D) g.create();

super.paintComponent(g2);

g2.drawImage(img, 0,0,parentWindow.getWidth(),parentWindow.getHeight(), null);

}

}

Try this..

Thanks

Srijit

[Srijit Chandrashekhar Nair]

It would be helpful if you can tell a bit more about what you are trying to do and the error you are getting

On Sat, Apr 6, 2013 at 3:22 PM, <tomas...@electrodevsweden.com> wrote:

Dear Srijit or anyone else..,

I did the Java-course at school about 10years ago and now I am ofcourse really tumbeling when I try to re-learn...

I tried your code below but without success, I would be really glad if someone could please help me out here, probably it is extremely simple..

My simple code looks like the following:

 import java.awt.BorderLayout;
import java.awt.Container;

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

import com.googlecode.javacv.OpenCVFrameGrabber;

import com.googlecode.javacv.cpp.opencv_core.IplImage;

public class javaVision extends JFrame implements ActionListener{
  

private static final long serialVersionUID = 1L;//bara frö att få bort ett felmeddelande från eclipse..
 
 // 0-default camera, 1 - next...so on
 OpenCVFrameGrabber grabber = new OpenCVFrameGrabber(1);
 IplImage IplImg = new IplImage();
 
    JPanel prePanel = new JPanel();
    JPanel postPanel = new JPanel();
   
    JButton captureButton = new JButton("Capture");
    
    public javaVision() {
        initUI();
    }

 

 
    public final void initUI() {
      
     Container contentPane = this.getContentPane();
     contentPane.setLayout(new BorderLayout());
    
     captureButton.setBounds(100, 60, 100, 30);
     
        //Add action listener to button
        captureButton.addActionListener(this);

        prePanel.setSize(640,480);
     
     this.add(prePanel, BorderLayout.SOUTH);
     this.add(captureButton, BorderLayout.NORTH);

     this.setTitle("Tooltip");
     this.setSize(1024, 728);
    
     setLocationRelativeTo(null);
     setDefaultCloseOperation(EXIT_ON_CLOSE);
    
     prePanel.setVisible(true);
     this.setVisible(true);
    }
   
    public void actionPerformed(ActionEvent e) {
       
     String cmd = e.getActionCommand();
       
     if (cmd.equals("Capture")){
           this.capture();
     }
    }

   
    public void capture(){
  try {
            grabber.start();
            IplImg = grabber.grab();
  }
     catch (Exception e) {
      e.printStackTrace();
     }
  
  BufferedImage BufImg = IplImg.getBufferedImage();
  int w = BufImg.getWidth();
  int h = BufImg.getHeight();
  System.out.println("width: "+w);
  System.out.println("height: "+h);
  
//BOTH THE IPLIMG AND THE BUFIMG CONTAINS CORRECT INFO , tried to save to file with ´both of them. The fault is probably on the following 4 lines..
  Graphics g = BufImg.getGraphics();

  Graphics2D g2 = (Graphics2D) g.create();
  

  prePanel.paintComponents(g2); 
  g2.drawImage(BufImg, 0, 0, w, h, null);
  //g2.drawLine(10, 10, 50, 50);//THIS DOESNT WORK EITHER
  
  prePanel.repaint();
  this.repaint();
  
  try {
   grabber.stop();
  } catch (com.googlecode.javacv.FrameGrabber.Exception e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  
    }
  
  
     public static void main(String[] args) {
         SwingUtilities.invokeLater(new Runnable() {
             public void run() {
              javaVision ex = new javaVision();
                 ex.setVisible(true);
             
             }
         });
     }

}

 

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Thanks
Srijit
860 712 1800
sriji...@gmail.com

www.thecoolblogs.com

[Tomas Bergh]

Dear Srijit,

What I am trying to achieve is the following:

1: create class extending JFrame

2. set borderlayout to the jframe

3. create and add jbutton to jframe north

4. create and add jpanel to jframe south,JPanel is named prePanel

5. add actionlistener to button

6. when clicked the button I call the function capture(). In capture I want to read a picture from the webcam and put it on the prePanel JFrame so that I can see in on the scree.

 

What happens when executing the code:

1. I enter the capture, captures a picture

2. I print out the size of the picture = ok

3. I tried to save the IplImage and the BufferedImage to disk and it was successful, so there is actually a picture captured.

4. BUT there is no picture shown on the screen!

 

Hope I did not miss anything.

 

Very thankful for your help!

 

Regards,

 

Tomas

2013/4/7 Srijit Chandrashekhar Nair <sriji...@gmail.com>

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[Samuel Audet]

On 04/07/2013 04:51 PM, Tomas Bergh wrote:
> Dear Srijit,
> What I am trying to achieve is the following:
> 1: create class extending JFrame
> 2. set borderlayout to the jframe
> 3. create and add jbutton to jframe north
> 4. create and add jpanel to jframe south,JPanel is named prePanel
> 5. add actionlistener to button
> 6. when clicked the button I call the function capture(). In capture I
> want to read a picture from the webcam and put it on the prePanel JFrame
> so that I can see in on the scree.
> What happens when executing the code:
> 1. I enter the capture, captures a picture
> 2. I print out the size of the picture = ok
> 3. I tried to save the IplImage and the BufferedImage to disk and it was
> successful, so there is actually a picture captured.
> 4. BUT there is no picture shown on the screen!

We have to actually draw the image for it to show. Follow the steps from
this tutorial:
http://docs.oracle.com/javase/tutorial/2d/images/drawimage.html

Samuel

[Tomas Bergh]

Hi Samuel,

 

I have now found the reason why I had  troubles... I believe it was related to the override of the paintComponent method.

 

Thank you for your help.

 

Regards,

Tomas