Re: failing to compare vector images files correctly

Hi All,

I have 3 images of "shape.gif" copied from the same primary
"shape.gif".

To date, I have converted each of the "shape.gif" into vectors, saved
the vectors
in datafiles. Each of the vector datafiles can be read to show each of
the images. If I
compare the vector datafiles, using the program below it says that
there is a
change. I do not believe that there is a actual change.

Further, I have tested the program by copying one vector file,
renaming it to be the
others. Obviously there is a error in the program, but I can't find
it.

Your help is appreciated.

bH

import java.io.*;
import java.util.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class applicPxlBytesCompare3Imgs
  extends JFrame {
    String width;
    String height;
    String reportResults01= ""; // results first and second file
comparison
    String reportResults02= ""; // results first and third file
comparison
    String reportResults12 = ""; // results second and third file
comparison
    String holdStr = "";
    int w, h;
    Vector vector0a = new Vector();
    Vector vector0b = new Vector();
    Vector vector1a = new Vector();
    Vector vector1b = new Vector();
    Vector vector2a = new Vector();
    Vector vector2b = new Vector();

  public static void main(String[] args) {
    applicPxlBytesCompare3Imgs myExample = new

applicPxlBytesCompare3Imgs("Pixel Color Comparison");
  }

  public applicPxlBytesCompare3Imgs(String title) {
    super(title);
    setSize(100, 100);
    addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent we) {
        dispose();
        System.exit(0);
      }
    });
    setVisible(true);
  }

  public void paint(Graphics g) {
    Graphics2D g2d = (Graphics2D) g;

    for (int i = 0; i<3; i++){
      if(i==0) {
        holdStr = "images/shape0.txt";
      }
      if(i==1) {
        holdStr = "images/shape1.txt";
      }
      if(i==2) {
        holdStr = "images/shape2.txt";
      }
      // read each of the files
      // first vector in each file has the width and height.
      // Second vector has the colors of each pixel.
       System.out.println("Files Assigned, now reading files ");
      try {

        FileInputStream fin = new FileInputStream(holdStr);
        ObjectInputStream in = new ObjectInputStream(fin);
        if(i==0) {
          vector0a = (Vector) in.readObject();//
          vector0b = (Vector) in.readObject();
        }
        if(i==1) {
          vector1a = (Vector) in.readObject();
          vector1b = (Vector) in.readObject();
        }
          if(i==2) {
          vector2a = (Vector) in.readObject();
          vector2b = (Vector) in.readObject();
        }
        in.close();
      }
       catch (Exception e) {
        System.out.println("error getting data");
      }
    }
      System.out.println("Now Comparing Vectors ");
        width = (String)vector0a.elementAt(0); //shape0 width
        w = Integer.parseInt(width);
        height = (String) vector0a.elementAt(1);//shape height
        h = Integer.parseInt(height);

        System.out.println("Working");

        int index = 0;
        reportResults01 = " all equal";
        reportResults02 = " all equal";
        reportResults12 = " all equal";
        for (int y = 0; y < h; y++) {
          for (int x = 0; x < w; x++) {
              if(vector0b.elementAt(index) !=
vector1b.elementAt(index)){
                  reportResults01 = "an instance of different color
vectors or locations in

First and Second Files ";
              System.out.println( "01 " + reportResults01 + " " +
index );
                }
               if(vector0b.elementAt(index) !=
vector2b.elementAt(index)){
                reportResults02 = "an instance of different color
vectors or locations in

First and Third Files ";
               System.out.println( "02 " + reportResults02 + " "+
index );
            }
              if(vector1b.elementAt(index) !=
vector2b.elementAt(index)){
                reportResults12 = "an instance of different color
vectors or locations in

Second and Third Files ";
               System.out.println( "12 " + reportResults12 + " "+
index );
            }

              ++index;
            }
          }
        }
    }