JAVA灰度化、二值化图片如此简单方便

JAVA灰度化、二值化图片如此简单方便

分类： java 算法2011-12-30
19:07 5589人阅读 评论(7) 收藏 举报

java图片灰度化图片二直化

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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);//重点，技巧在这个参数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);//重点，技巧在这个参数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

原图：


灰度化后的图片：


二值化后的图片：


效果还可以，赞一个JAVA。