java实现图片反色处理代码示例

Posted 2021-12-15 洛阳泰山

效果对比

原图

 反色处理

 原图

 反色处理

 核心代码实现

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

public class ImageColor 


    /**
     * @Description: 反色
     * @param  imgPath 图片路径
     * @param  fileUrl 输出图片路径
     * @throws
     */
    public static void inverse(String imgPath, String fileUrl)
        try 
            FileInputStream fileInputStream = new FileInputStream(imgPath);
            BufferedImage image = ImageIO.read(fileInputStream);
            //生成字符图片
            int w = image.getWidth();
            int h = image.getHeight();
            BufferedImage imageBuffer = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);;
            // 绘制字符
            for (int y = 0; y < h; y++) 
                for (int x = 0; x< w; x++) 
                    int rgb = image.getRGB(x, y);
                    int R = (rgb & 0xff0000) >> 16;
                    int G = (rgb & 0x00ff00) >> 8;
                    int B = rgb & 0x0000ff;
                    int newPixel=colorToRGB(255-R,255-G,255-B);
                    imageBuffer.setRGB(x,y,newPixel);
                
            
            ImageIO.write(imageBuffer, "png", new File(fileUrl)); //输出图片
         catch (Exception e) 
            e.printStackTrace();
        
    

    /**
     * @Description: 颜色转rgb值
     * @throws
     */
    public static int colorToRGB(int red,int green,int blue)
        int newPixel=0;
        newPixel=newPixel << 8;
        newPixel+=red;
        newPixel=newPixel << 8;
        newPixel+=green;
        newPixel=newPixel << 8;
        newPixel+=blue;
        return  newPixel;

    



    public static void main(String[] args) throws IOException 
        inverse("C:\\\\Users\\\\liuya\\\\Desktop\\\\laoying.png","C:\\\\Users\\\\liuya\\\\Desktop\\\\logo_0.png");
    

补充知识

三基色是光的红，绿，蓝

0xff0000  为RGB十六位制的红色

0x00ff00  为RGB十六位制的绿色

0x0000ff  为RGB十六位制的蓝色

运行主方法即可。