JAVA实现图像ROI裁剪

简介

JAVA实现图片（.jpg）ROI裁剪。

代码实现

package com.hdfs;

import java.awt.Rectangle;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Iterator;

import javax.imageio.ImageIO;
import javax.imageio.ImageReadParam;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;

public class javaROI {
            public static void main(String[] args) 
                throws IOException {
    // TODO Auto-generated method stub

        String imPath = "/home/hadoop/Desktop/0001.jpg";
        String outPath = "/home/hadoop/Desktop/0001_ROI.jpg";

        javaROI roi = new javaROI();
        roi.cut(imPath, outPath, 100, 100, 100, 100);
    }
    public void cut(String imPath, String outPath, 
        int x, int y, int width, int height) 
            throws IOException{

            FileInputStream is = null;
            ImageInputStream iis = null;

            try{

            //read image
            is = new FileInputStream(imPath);
                Iterator < ImageReader > it =ImageIO.getImageReadersByFormatName("jpg");
            ImageReader reader = it.next();

            //image stream
            iis = ImageIO.createImageInputStream(is);           
            reader.setInput(iis, true );
            ImageReadParam param = reader.getDefaultReadParam();
            Rectangle rect =  new Rectangle(x, y, width, height);
            param.setSourceRegion(rect);
            BufferedImage bi = reader.read(0, param);
            ImageIO.write(bi, "jpg", new File(outPath));

            System.out.println("Saved!");

        }finally{
            if (is != null ){
                is.close();
            }
            if(iis!=null){
                iis.close();
            }
        }
    }
}