本文实例为大家分享了java使用电脑摄像头识别二维码的具体代码，供大家参考，具体内容如下

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：

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); } }

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。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。