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

 1 /**
 2  * 
 3  */
 4 package com.b510.image.clent;
 5 
 6 import java.io.File;
 7 
 8 import com.b510.image.common.Common;
 9 import com.b510.image.util.ImageUtil;
10 
11 /**
12  * @author Hongten
13  * @create 2014-7-13
14  * @mail hongtenzone@foxmail.com
15  */
16 public class Client {
17 
18     public static void main(String[] args) {
19         File input = new File(Common.ORGINAL_IMAGE);
20         File out = new File(Common.PROCESSED_IMAGE);
21         ImageUtil.changeImge(input, out);
22     }
23 }

 1 /**
 2  * 
 3  */
 4 package com.b510.image.common;
 5 
 6 /**
 7  * @author Hongten
 8  * @create 2014-7-13
 9  * @mail hongtenzone@foxmail.com
10  */
11 public class Common {
12 
13     // Orginal image path
14     public static String ORGINAL_IMAGE = "src/com/b510/image/resources/orginal_image.jpg";
15     // Processed image path
16     public static String PROCESSED_IMAGE = "src/com/b510/image/resources/processed_image.jpg";
17 
18     public static String PROCESS_SUCCESS = "Processed successfully.....";
19     public static String PROCESS_ERROR = "Processing encounters error!";
20 }

 1 /**
 2  * 
 3  */
 4 package com.b510.image.util;
 5 
 6 import java.awt.Image;
 7 import java.awt.color.ColorSpace;
 8 import java.awt.image.BufferedImage;
 9 import java.awt.image.ColorConvertOp;
10 import java.io.File;
11 import java.io.FileOutputStream;
12 import java.io.IOException;
13 
14 import javax.imageio.ImageIO;
15 
16 import com.b510.image.common.Common;
17 import com.sun.image.codec.jpeg.JPEGCodec;
18 import com.sun.image.codec.jpeg.JPEGImageEncoder;
19 
20 /**
21  * @author Hongten
22  * @create 2014-7-13
23  * @mail hongtenzone@foxmail.com
24  */
25 public class ImageUtil {
26     /**
27      * Color image is converted to black and white picture.
28      */
29     public static void changeImge(File input, File out) {
30         try {
31             Image image = ImageIO.read(input);
32             int srcH = image.getHeight(null);
33             int srcW = image.getWidth(null);
34             BufferedImage bufferedImage = new BufferedImage(srcW, srcH, BufferedImage.TYPE_3BYTE_BGR);
35             bufferedImage.getGraphics().drawImage(image, 0, 0, srcW, srcH, null);
36             bufferedImage = new ColorConvertOp(ColorSpace.getInstance(ColorSpace.CS_GRAY), null).filter(bufferedImage, null);
37             FileOutputStream fos = new FileOutputStream(out);
38             JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(fos);
39             encoder.encode(bufferedImage);
40             fos.close();
41             System.out.println(Common.PROCESS_SUCCESS);
42         } catch (IOException e) {
43             e.printStackTrace();
44             throw new IllegalStateException(Common.PROCESS_ERROR, e);
45         }
46     }
47 
48 }