java如何删除除某个rgb值以外的所有颜色

Question

好的，我需要让程序扫描屏幕上的某个rgb值，然后将其更改为亮粉色。我制作了这个程序，到目前为止，它会扫描屏幕上的某种颜色。我不知道如何让它改变像素的颜色。我想我需要上传一张图片，而不是让它扫描屏幕。但是如果我这样做，我仍然不知道如何改变像素

这是到目前为止我的代码

import java.awt.AWTException;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.awt.image.DataBuffer;
import java.awt.image.DataBufferInt;
import java.awt.image.WritableRaster;


public class FindRgbOnScreen extends Thread{

    public Rectangle captureSize;

    public FindRgbOnScreen() {
        captureSize = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
    }

    public void run() {
        try {
            Robot robot = new Robot();

            while(true){
                BufferedImage img = robot.createScreenCapture(captureSize);
                WritableRaster r = img.getRaster();
                DataBuffer db = r.getDataBuffer();
                DataBufferInt dbi = (DataBufferInt)db;
                int[] data = dbi.getData();                 

                for (int x_scale = 0; x_scale < captureSize.width; x_scale += 1) {  //this scans the screen 
                    for(int y_scale = 0; y_scale < captureSize.height; y_scale += 1) {
                        int rgb = data[x_scale + captureSize.width * y_scale];
                        if (rgb == -5381164){
                            //change pixel to pink
                        }
                        else{
                            //change pixel to grey
                        }
                    }
                }
            }
        }
        catch(AWTException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        new FindRgbOnScreen().start();
    }
}

Answer 1

看看这些帖子。您应该使用ColorModel这是最快的像素颜色替换方法，而不是在像素上迭代：

• http://helpdesk.objects.com.au/java/changing-the-colormodel-of-a-bufferedimage
• JAVA: Substitute one color with another using ColorModel
• How to replace colors in BufferedImage in JAVA