package com.bendbits.imagediff;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

public class ImageDiff {
    public static void main(String[] args) throws IOException {
        BufferedImage image1 = ImageIO.read(new File("C:\\Users\\Steve\\Desktop\\image1.png"));
        BufferedImage image2 = ImageIO.read(new File("C:\\Users\\Steve\\Desktop\\image2.png"));

        BufferedImage diff = new BufferedImage(image1.getWidth(), image1.getHeight(), image1.getType());

        for (int col = 0; col < image1.getWidth(); col++) {
            for (int row = 0; row < image1.getHeight(); row++) {
                int rgb1 = image1.getRGB(col, row);
                int rgb2 = image2.getRGB(col, row);

                Color col1 = new Color(rgb1);
                Color col2 = new Color(rgb2);

                Color diffCol = new Color(Math.abs(col1.getRed() - col2.getRed()), Math.abs(col1.getGreen() - col2.getGreen()), Math.abs(col1.getBlue() - col2.getBlue()));
                diff.setRGB(col, row, diffCol.getRGB());
            }
        }

        ImageIO.write(diff, "png", new File("C:\\Users\\Steve\\Desktop\\diff.png"));
    }
}