簡單實例：JAVA灰度化 二值化圖片

package image;  
 
import Java.awt.image.BufferedImage;  
import Java.io.File;  
import Java.io.IOException;  
 
import Javax.imageio.ImageIO;  
 
public class ImageDemo {  
 
    public void binaryImage() throws IOException{  
    File file = new File(System.getProperty("user.dir")+"/src/2722425974762424026.jpg");  
    BufferedImage image = ImageIO.read(file);  
      
    int width = image.getWidth();  
    int height = image.getHeight();  
      
    BufferedImage grayImage = new BufferedImage(width, height, BufferedImage.TYPE_BYTE_BINARY);  
    for(int i= 0 ; i < width ; i++){  
        for(int j = 0 ; j < height; j++){  
        int rgb = image.getRGB(i, j);  
        grayImage.setRGB(i, j, rgb);  
        }  
    }  
      
    File newFile = new File(System.getProperty("user.dir")+"/src/2722425974762424028.jpg");  
    ImageIO.write(grayImage, "jpg", newFile);  
    }  
      
    public void grayImage() throws IOException{  
    File file = new File(System.getProperty("user.dir")+"/src/2722425974762424026.jpg");  
    BufferedImage image = ImageIO.read(file);  
      
    int width = image.getWidth();  
    int height = image.getHeight();  
      
    BufferedImage grayImage = new BufferedImage(width, height, BufferedImage.TYPE_BYTE_GRAY);  
    for(int i= 0 ; i < width ; i++){  
        for(int j = 0 ; j < height; j++){  
        int rgb = image.getRGB(i, j);  
        grayImage.setRGB(i, j, rgb);  
        }  
    }  
      
    File newFile = new File(System.getProperty("user.dir")+"/src/2722425974762424027.jpg");  
    ImageIO.write(grayImage, "jpg", newFile);  
    }  
      
    public static void main(String[] args) throws IOException {  
    ImageDemo demo = new ImageDemo();  
    demo.binaryImage();  
    demo.grayImage();  
    }  
 
} 

主要就是BufferedImage.TYPE.BYTE.GRAY灰度化，BufferedImage.TYPE.BYTE.BINARY二值化

原圖：

灰度化後的圖片：

二值化後的圖片：

效果還可以，贊一個Java。