彩色照片转换为黑白照片(Color image converted to black and white picture)

This blog will be talking about the color image converted to black and white picture.

The project structure as follow:

The run result:

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source code：

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/UUUU_Test/src/com/b510/image/clent/Client.java

/**
 * 
 */
package com.b510.image.clent;

import java.io.File;

import com.b510.image.common.Common;
import com.b510.image.util.ImageUtil;

/**
 * @author Hongten
 * @create 2014-7-13
 * @mail hongtenzone@foxmail.com
 */
public class Client {

    public static void main(String[] args) {
        File input = new File(Common.ORGINAL_IMAGE);
        File out = new File(Common.PROCESSED_IMAGE);
        ImageUtil.changeImge(input, out);
    }
}

/UUUU_Test/src/com/b510/image/common/Common.java

/**
 * 
 */
package com.b510.image.common;

/**
 * @author Hongten
 * @create 2014-7-13
 * @mail hongtenzone@foxmail.com
 */
public class Common {

    // Orginal image path
    public static String ORGINAL_IMAGE = "src/com/b510/image/resources/orginal_image.jpg";
    // Processed image path
    public static String PROCESSED_IMAGE = "src/com/b510/image/resources/processed_image.jpg";

    public static String PROCESS_SUCCESS = "Processed successfully.....";
    public static String PROCESS_ERROR = "Processing encounters error!";
}

/UUUU_Test/src/com/b510/image/util/ImageUtil.java

/**
 * 
 */
package com.b510.image.util;

import java.awt.Image;
import java.awt.color.ColorSpace;
import java.awt.image.BufferedImage;
import java.awt.image.ColorConvertOp;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

import javax.imageio.ImageIO;

import com.b510.image.common.Common;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;

/**
 * @author Hongten
 * @create 2014-7-13
 * @mail hongtenzone@foxmail.com
 */
public class ImageUtil {
    /**
     * Color image is converted to black and white picture.
     */
    public static void changeImge(File input, File out) {
        try {
            Image image = ImageIO.read(input);
            int srcH = image.getHeight(null);
            int srcW = image.getWidth(null);
            BufferedImage bufferedImage = new BufferedImage(srcW, srcH, BufferedImage.TYPE_3BYTE_BGR);
            bufferedImage.getGraphics().drawImage(image, 0, 0, srcW, srcH, null);
            bufferedImage = new ColorConvertOp(ColorSpace.getInstance(ColorSpace.CS_GRAY), null).filter(bufferedImage, null);
            FileOutputStream fos = new FileOutputStream(out);
            JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(fos);
            encoder.encode(bufferedImage);
            fos.close();
            System.out.println(Common.PROCESS_SUCCESS);
        } catch (IOException e) {
            e.printStackTrace();
            throw new IllegalStateException(Common.PROCESS_ERROR, e);
        }
    }

}

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