Reading pixel color from Image?

Question

Hello frnds,
I am making a project in which i have to upload Image, am trying to find color of each pixel in RGB format so that I can locate where my sprite begins in Image !!
But I am not able to do so.. do I have to use PixelGrabber to do that? or should i use RGBImageFilter..!! I am new to java so if u can tell me how to use them, then It would be grateful.
I want to scan whole image from left to right, Right to left, top to bottom and vice-versa. So that I can exactly tell at what pixel value sprite starts and ends.
Please help me out. any sort of help will be useful for my project..
Thanking you in advance.

Answer 1

Image bufferImage;PixelGrabber pg1;
public boolean fetchPixels(byte[] jpegData, int[] pixelData)
     try
          bufferImage = Toolkit.getDefaultToolkit().createImage(jpegData);
          // this may not be required unless asynchronous, but seems to do no harm
          MediaTracker mt = new MediaTracker(jcamData);
          mt.addImage(bufferImage, 0);
          try
               mt.waitForID(0);
          catch(InterruptedException e)
               e.printStackTrace();
          if(mt.isErrorAny()==true)
               System.out.println("Exception fetchPixels "+"createImage failed");
               // flush anything in bufferedImage
               if(bufferImage!=null)bufferImage.flush();
               return false;     // and pixelData not updated
          Thread.yield();
          pg1 = new PixelGrabber(bufferImage, 0, 0, camWidth, camHeight, pixelData, 0, camWidth);
          try{pg1.grabPixels();}catch(InterruptedException e){}
          Thread.yield();
          // flush bufferedImage as no longer needed, and so not to be in memory cache for next image load
          if(bufferImage!=null)
               bufferImage.flush();               
     catch(Exception e){System.out.println("Exception fetchPixels "+e);}
     return true;
}