使用电脑摄像头识别二维码

CameraFrame2.java

package com.pengo.capture;

import javax.swing.JFrame;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.InputStream;
import javax.media.MediaLocator;
import javax.swing.JPanel;
import javazoom.jl.player.Player;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.Result;
import com.google.zxing.common.HybridBinarizer;

import net.sf.fmj.ui.application.CaptureDeviceBrowser;
import net.sf.fmj.ui.application.ContainerPlayer;
import net.sf.fmj.ui.application.PlayerPanelPrefs;
public class CameraFrame2 extends JFrame{
    private static int num = 0;
    public CameraFrame2() throws Exception{
        this.setTitle("摄像头截图应用");
        this.setSize(480, 500);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        final JPanel cameraPanel = new JPanel();
        this.getContentPane().setLayout(new BorderLayout());
        this.getContentPane().add(cameraPanel, BorderLayout.CENTER);
        ContainerPlayer containerPlayer = new ContainerPlayer(cameraPanel);
        MediaLocator locator = CaptureDeviceBrowser.run(null);   //弹出摄像头设备选择

        PlayerPanelPrefs prefs = new PlayerPanelPrefs();
        containerPlayer.setMediaLocation(locator.toExternalForm(), prefs.autoPlay);
        
        new Thread() {
            public void run() {
                while (true) {
                    try {
                        Thread.sleep(1000);
                        Dimension imageSize = cameraPanel.getSize();
                        BufferedImage image = new BufferedImage(
                                imageSize.width, imageSize.height,
                                BufferedImage.TYPE_INT_ARGB);
                        Graphics2D g = image.createGraphics();
                        cameraPanel.paint(g);
                        g.dispose();
                        LuminanceSource source = new BufferedImageLuminanceSource(
                                image);
                        BinaryBitmap bitmap = new BinaryBitmap(
                                new HybridBinarizer(source));
                        Result result;
                        result = new MultiFormatReader().decode(bitmap);
                        System.out.println("二维码====:" + result.getText());
                        InputStream is = CameraFrame.class.getClassLoader().getResourceAsStream("resource/beep.mp3");
                        Player player = new Player(is);
                        player.play();
                    } catch (Exception re) {
                        re.printStackTrace();
                    }
                }
            }
        }.start();
    }
    
    public static void main(String[] args) throws Exception{
        CameraFrame2 camera = new CameraFrame2();
        camera.setVisible(true);
    }
}

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。

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。

原文地址：http://www.blogjava.net/pengo/archive/2012/09/10/387428.html