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i am working on image processing projects in that i have given specific pixel i want to find out all pixel which are connected to that pixel.ex. i have give white pixel for specific position i want to find all connected pixel to the white (only connected to white ) how can do that or how can check pixel are connected or not.
TorstenH. 6-Dec-13 8:24am     CRLF
do I get this right? You've set a pixel on a grid (10:10) on a specific position (like 3:5). And now you want to figure wich grid positions are aside?

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by using Flood Fill algorithm i have done this

import java.awt.image.BufferedImage;

import javax.imageio.ImageIO;
import javax.swing.JLabel;
import javax.swing.ImageIcon;
import java.awt.Point;
class mm1
	  private static void repaintAndDelay(BufferedImage image)
	    _imageLabel.setIcon(new ImageIcon(image));
	    try { Thread.sleep(1); } catch (Exception ignore) {}
  public static void floodFill(BufferedImage image, int x,int y, int fillColor)
    java.util.ArrayList<point> examList=new java.util.ArrayList<point>();
    int initialColor=image.getRGB(x,y);
    examList.add(new Point(x,y));
    while (examList.size()>0)
      Point p = examList.remove(0);
      if (image.getRGB(p.x,p.y)==initialColor)
        x = p.x;  y = p.y;
        image.setRGB(x, y, fillColor); 
 examList.add(new Point(x-1,y));        
        examList.add(new Point(x+1,y));        
        examList.add(new Point(x,y-1));        
        examList.add(new Point(x,y+1));        
  public static int packRgb(int r,int g,int b)
    return (r*256+g)*256+b;
 static JLabel _imageLabel;
  public static void main(String[] args) throws Exception
    BufferedImage File("test1.png"));
    JLabel imageLabel=new JLabel();
    _imageLabel = imageLabel; 
    imageLabel.setIcon(new ImageIcon(image));
   javax.swing.JFrame window=new javax.swing.JFrame();
    int yellow = packRgb(255,0,0);
    int x=100, y=100;  
    floodFill(image,x,y, yellow);
    imageLabel.setIcon(new ImageIcon(image));
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