使用电脑摄像头识别二维码

要想摄像头识别二维码，需要两个基本功能：1、从摄像头获取图像，2、根据图片解析出二维码信息。在上一篇java摄像头截图已经实现了摄像头截图，只要再加上zxing（或其它能从图片中解析二维码的组件），就能从图像中解析出二维码，实现代码如下：

 1 package com.pengo.capture;
 2 
 3 import javax.swing.JFrame;
 4 import java.awt.BorderLayout;
 5 import java.awt.Dimension;
 6 import java.awt.Graphics2D;
 7 import java.awt.image.BufferedImage;
 8 import java.io.InputStream;
 9 import javax.media.MediaLocator;
10 import javax.swing.JPanel;
11 import javazoom.jl.player.Player;
12 import com.google.zxing.BinaryBitmap;
13 import com.google.zxing.LuminanceSource;
14 import com.google.zxing.MultiFormatReader;
15 import com.google.zxing.Result;
16 import com.google.zxing.common.HybridBinarizer;
17 
18 import net.sf.fmj.ui.application.CaptureDeviceBrowser;
19 import net.sf.fmj.ui.application.ContainerPlayer;
20 import net.sf.fmj.ui.application.PlayerPanelPrefs;
21 public class CameraFrame2 extends JFrame{
22     private static int num = 0;
23     public CameraFrame2() throws Exception{
24         this.setTitle("摄像头截图应用");
25         this.setSize(480, 500);
26         this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
27         final JPanel cameraPanel = new JPanel();
28         this.getContentPane().setLayout(new BorderLayout());
29         this.getContentPane().add(cameraPanel, BorderLayout.CENTER);
30         ContainerPlayer containerPlayer = new ContainerPlayer(cameraPanel);
31         MediaLocator locator = CaptureDeviceBrowser.run(null);   //弹出摄像头设备选择
32 
33         PlayerPanelPrefs prefs = new PlayerPanelPrefs();
34         containerPlayer.setMediaLocation(locator.toExternalForm(), prefs.autoPlay);
35         
36         new Thread() {
37             public void run() {
38                 while (true) {
39                     try {
40                         Thread.sleep(1000);
41                         Dimension imageSize = cameraPanel.getSize();
42                         BufferedImage image = new BufferedImage(
43                                 imageSize.width, imageSize.height,
44                                 BufferedImage.TYPE_INT_ARGB);
45                         Graphics2D g = image.createGraphics();
46                         cameraPanel.paint(g);
47                         g.dispose();
48                         LuminanceSource source = new BufferedImageLuminanceSource(
49                                 image);
50                         BinaryBitmap bitmap = new BinaryBitmap(
51                                 new HybridBinarizer(source));
52                         Result result;
53                         result = new MultiFormatReader().decode(bitmap);
54                         System.out.println("二维码====:" + result.getText());
55                         InputStream is = CameraFrame.class.getClassLoader().getResourceAsStream("resource/beep.mp3");
56                         Player player = new Player(is);
57                         player.play();
58                     } catch (Exception re) {
59                         re.printStackTrace();
60                     }
61                 }
62             }
63         }.start();
64     }
65     
66     public static void main(String[] args) throws Exception{
67         CameraFrame2 camera = new CameraFrame2();
68         camera.setVisible(true);
69     }
70 }

最后来张效果图（本图仅供参考）

要想识别效果好点，摄像头像素最好500W以上，

活动二维码签到、物品扫描，只需扛台手提，再加个高清摄像头就行了。

来源：CSDN

作者：a19880813

链接：https://blog.csdn.net/a19880813/article/details/37691217