java使图片灰度化、二值化

http://my.csdn.net/yuzhibofei123/code/detail/30393

Java代码

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("c.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("d.jpg");
        ImageIO.write(grayImage, "jpg", newFile);
    }
    public void grayImage() throws IOException
    {
        File file = new File("c.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("e.jpg");
        ImageIO.write(grayImage, "jpg", newFile);
    }
    public static void main(String[] args) throws IOException 
    {
        ImageDemo demo = new ImageDemo();
        demo.binaryImage();
        demo.grayImage();
    }
}