Blur an image - it just draws a black box!!

Question

Hi,
I'm trying to write a method to blur an image and draw it on a panel. It just draws a black box (at least its the right width and height though!)
I'm not too familar with Graphics 2D so I've no idea what the problem is - I've looked at several examples and as far as I can see my code is the same..
This is the main class:
public void blur()
      currentImage = images[lsClips.getSelectedIndex()];
      int height=currentImage.getHeight(this);   //make new buffered image same width, height as original image
      int width=currentImage.getWidth(this);
      System.out.println("the width is"+width);
                                                   //convert original image to a buffered image
      BufferedImage srcBuffImg= new BufferedImage(width,height, BufferedImage.TYPE_INT_RGB);
      Graphics2D big = srcBuffImg.createGraphics();
      big.drawImage(srcBuffImg,0,0,processedImagePanel);
      processedImagePanel.setImage(srcBuffImg);
      processedImagePanel.repaint();
      processedImagePanel.revalidate();
}processedImagePanel is a customised JPanel class that I created to display the image on. I think that the setImage() method works propperly - the buffered image is not null when I checked it in this method. This is the setImage() and paintComponent() methods of that class.
public class ImagePanel extends JPanel
private BufferedImage buffImg;
float[] elements = { .1111f,.1111f, .1111f,
                      .1111f,.1111f, .1111f,
                      .1111f,.1111f, .1111f,};
  public void setImage(BufferedImage img)
    processing = true;
    this.buffImg = img;
    this.repaint();
    this.revalidate(); 
  protected void paintComponent(Graphics g)
    super.paintComponent(g); //paint background
    if(buffImg!=null )   //draws blurrred image
      System.out.println("DRAW Buffered img");
      Graphics2D g2 = (Graphics2D) g;
      int w = getSize().width;
      int h = getSize().height;
      int bw = buffImg.getWidth(this);
      int bh = buffImg.getHeight(this);
                    //create a buffered image for the processed image
     BufferedImage destBuffImg = new BufferedImage(bw,bh,BufferedImage.TYPE_INT_RGB);
     Kernel kernel = new Kernel(3,3,elements);
     ConvolveOp cop = new ConvolveOp(kernel,ConvolveOp.EDGE_NO_OP,null);
     cop.filter(buffImg,destBuffImg);
     g2.drawImage(buffImg,cop, 10,10);
}I would be very grateful if anyone could give me any suggestions..

Answer 1

BufferedImage srcBuffImg = new BufferedImage(width,height, BufferedImage.TYPE_INT_RGB);
Graphics2D big = srcBuffImg.createGraphics();
big.drawImage(srcBuffImg,0,0,processedImagePanel);
processedImagePanel.setImage(srcBuffImg);
processedImagePanel.repaint();
processedImagePanel.revalidate();I think the bug is here: why do you paint the (empty) buffered image in itself? I guess, you wanted to paint the currentImage to the bufferedImage.