浅谈内网监控屏幕中基于 Java 语言的差分算法应用

import java.awt.AWTException;
import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.image.BufferedImage;
import javax.imageio.ImageIO;
import java.io.File;
import java.io.IOException;

public class ScreenDiffAlgorithm {

    private BufferedImage baseImage;

    // 获取初始基准屏幕图像
    public void captureBaseImage() throws AWTException, IOException {
        Robot robot = new Robot();
        Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
        Rectangle screenRect = new Rectangle(screenSize);
        baseImage = robot.createScreenCapture(screenRect);
        ImageIO.write(baseImage, "png", new File("base_image.png"));
    }

    // 计算屏幕图像差分
    public BufferedImage calculateDiff() throws AWTException, IOException {
        Robot robot = new Robot();
        Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
        Rectangle screenRect = new Rectangle(screenSize);
        BufferedImage currentImage = robot.createScreenCapture(screenRect);

        int width = currentImage.getWidth();
        int height = currentImage.getHeight();
        BufferedImage diffImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);

        for (int y = 0; y < height; y++) {
            for (int x = 0; x < width; x++) {
                int argbBase = baseImage.getRGB(x, y);
                int argbCurrent = currentImage.getRGB(x, y);
                // 简单对比像素RGB值判断是否有差异（可根据实际优化差值判断条件）
                if (argbBase!= argbCurrent) {
                    diffImage.setRGB(x, y, argbCurrent);
                }
            }
        }

        return diffImage;
    }

    public static void main(String[] args) {
        ScreenDiffAlgorithm diffAlgorithm = new ScreenDiffAlgorithm();
        try {
            diffAlgorithm.captureBaseImage();
            BufferedImage diffImage = diffAlgorithm.calculateDiff();
            // 这里可后续添加对差分图像的处理，如压缩、传输等逻辑
            ImageIO.write(diffImage, "png", new File("diff_image.png"));
        } catch (AWTException | IOException e) {
            e.printStackTrace();
        }
    }
}