Re: Compare two images....?

In article
<833d8bd2-b056-49de-9db1-294d7b534482@d21g2000prf.googlegroups.com>,
 TheBigPJ <TheBigPJ@gmail.com> wrote:


There are several problems with your code: You need to call grabPixels()
for the second image, too; once you know the dimensions, you need to
allocate memory for the array returned by getPixels(); your output is
ambiguous. Here's an alternative:

import java.awt.Image;
import java.awt.Toolkit;
import java.awt.image.PixelGrabber;

public class Compare {

    static void processImage() {
    String file1 = "pic1.png";
    String file2 = "pic2.png";

    Image image1 = Toolkit.getDefaultToolkit().getImage(file1);
    Image image2 = Toolkit.getDefaultToolkit().getImage(file2);

    try {

        PixelGrabber grab1 =
            new PixelGrabber(image1, 0, 0, -1, -1, false);
        PixelGrabber grab2 =
            new PixelGrabber(image2, 0, 0, -1, -1, false);

        int[] data1 = null;
        if (grab1.grabPixels()) {
            int width = grab1.getWidth();
            int height = grab1.getHeight();
            data1 = new int[width * height];
            data1 = (int[]) grab1.getPixels();
        }

        int[] data2 = null;
        if (grab2.grabPixels()) {
            int width = grab2.getWidth();
            int height = grab2.getHeight();
            data2 = new int[width * height];
            data2 = (int[]) grab2.getPixels();
        }

        System.out.println("Pixels equal: " +
            java.util.Arrays.equals(data1, data2));

        } catch (InterruptedException e1) {
            e1.printStackTrace();
        }
    }

    public static void main(String args[]) {
        processImage();
    }
}

John
--
John B. Matthews
trashgod at gmail dot com
home dot woh dot rr dot com slash jbmatthews