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 [e-mail]
  */
 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 [e-mail]
  */
 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 [e-mail]
  */
 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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