C#调用摄像头（AForge）实现扫描条码解析（Zxing）功能
网上找了很多代码，都比较零散，以下代码纯自己手写，经过测试。下面有链接，下载后可以直接使用。
介绍：
自动识别：点击Start按钮会调用PC摄像头，代码内置Timer，会每100毫秒识别一下当前摄像头图像中的图像，并调用条码识别功能判定是否有条码，如果有的话就直接停止，否则继循环识别。
截图：也可以手动截图，截图后存在运行目录，请自行查找。
补充：识别通过率取决于摄像头的像素，我的笔记本比较烂，所以通过率不高。高像素的摄像头通过率很高。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using AForge;
using AForge.Controls;
using AForge.Imaging;
using AForge.Video;
using AForge.Video.DirectShow;
using System.Drawing.Imaging;
using ZXing;
using ZXing.Common;
using ZXing.QrCode;
using ZXing.QrCode.Internal;
/// <summary>
/// 20190515 by hanfre
/// 关于原理：
/// C#调用摄像头+存储图片+Zxing/Zbar图片识别.当开启摄像头的时候利用Timer对当前图片进行解析处理，识别条码；
/// 关于条码解析：
/// 这个DEMO含两个条码解析组件，分别是Zxing和Zbar，使用哪个可以自己切换；
/// 关于作者：
/// Hanfre
/// </summary>
namespace WindowsFormsApplication1
{
/// <summary>
/// 20190515 by hanfre
/// </summary>
public partial class Form1 : Form
{
#region 全局变量定义
FilterInfoCollection videoDevices;
VideoCaptureDevice videoSource;
public int selectedDeviceIndex = 0;
#endregion
public Form1()
{
InitializeComponent();
InitializeView();
}
#region 事件
/// <summary>
/// 启动
/// 20190515 by hanfre
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void BtnStart_Click(object sender, EventArgs e)
{
PbxScanner.Image = null;
videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
selectedDeviceIndex = 0;
videoSource = new VideoCaptureDevice(videoDevices[selectedDeviceIndex].MonikerString);//连接摄像头
videoSource.NewFrame += new NewFrameEventHandler(VspContainerClone);//捕获画面事件
videoSource.VideoResolution = videoSource.VideoCapabilities[selectedDeviceIndex];
VspContainer.VideoSource = videoSource;
VspContainer.Start();
StartVideoSource();
}
/// <summary>
/// 停止
/// 20190515 by hanfre
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void BtnStop_Click(object sender, EventArgs e)
{
CloseVideoSource();
}
/// <summary>
/// 保存
/// 20190515 by hanfre
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void BtnScanner_Click(object sender, EventArgs e)
{
if (videoSource == null)
return;
Bitmap bitmap = VspContainer.GetCurrentVideoFrame();
string fileName = DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss-ff") + ".jpg";
bitmap.Save(Application.StartupPath + "\\" + fileName, ImageFormat.Jpeg);
bitmap.Dispose();
}
/// <summary>
/// 同步事件
/// 20190515 by hanfre
/// </summary>
/// <param name="sender"></param>
/// <param name="eventArgs"></param>
private void VspContainerClone(object sender, NewFrameEventArgs eventArgs)
{
PbxScanner.Image = (Bitmap)eventArgs.Frame.Clone();
}
/// <summary>
/// Timer定时器
/// 20190515 by hanfre
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void TmScanner_Tick(object sender, EventArgs e)
{
if (PbxScanner.Image != null)
{
TmScanner.Enabled = false;
Bitmap img = (Bitmap)PbxScanner.Image.Clone();
if (DecodeByZxing(img))
///if (DecodeByZbar(img))
{
CloseVideoSource();
}
else
{
TmScanner.Enabled = true;
}
}
}
#endregion
#region 方法
/// <summary>
/// 初始化
/// 20190515 by hanfre
/// </summary>
private void InitializeView()
{
BtnScanner.Enabled = false;
BtnStop.Enabled = false;
}
/// <summary>
/// 启动
/// 20190515 by hanfre
/// </summary>
private void StartVideoSource()
{
TmScanner.Enabled = true;
BtnStart.Enabled = false;
BtnStop.Enabled = true;
BtnScanner.Enabled = true;
}
/// <summary>
/// 关闭
/// 20190515 by hanfre
/// </summary>
private void CloseVideoSource()
{
if (!(videoSource == null))
{
if (videoSource.IsRunning)
{
videoSource.SignalToStop();
videoSource = null;
}
}
VspContainer.SignalToStop();
//videoSourcePlayer1.Stop();
//videoSourcePlayer1.Dispose();
TmScanner.Enabled = false;
BtnScanner.Enabled = false;
BtnStart.Enabled = true;
BtnStop.Enabled = false;
}
#endregion
#region 方法/Zxing&Zbar
/// <summary>
/// 解码
/// 20190515 by hanfre
/// </summary>
/// <param name="b"></param>
/// <returns></returns>
private bool DecodeByZxing(Bitmap b)
{
try
{
BarcodeReader reader = new BarcodeReader();
reader.AutoRotate = true;
Result result = reader.Decode(b);
TxtScannerCode.Text = result.Text;
}
catch (Exception e)
{
System.Console.WriteLine(e.Message);
TxtScannerCode.Text = "";
return false;
}
return true;
}
private bool DecodeByZbar(Bitmap b)
{
DateTime now = DateTime.Now;
Bitmap pImg = ZbarMakeGrayscale3(b);
using (ZBar.ImageScanner scanner = new ZBar.ImageScanner())
{
scanner.SetConfiguration(ZBar.SymbolType.None, ZBar.Config.Enable, 0);
scanner.SetConfiguration(ZBar.SymbolType.CODE39, ZBar.Config.Enable, 1);
scanner.SetConfiguration(ZBar.SymbolType.CODE128, ZBar.Config.Enable, 1);
List<ZBar.Symbol> symbols = new List<ZBar.Symbol>();
symbols = scanner.Scan((System.Drawing.Image)pImg);
if (symbols != null && symbols.Count > 0)
{
string result = string.Empty;
symbols.ForEach(s => result += "条码内容:" + s.Data + " 条码质量:" + s.Quality + Environment.NewLine);
MessageBox.Show(result);
return true;
}
else
{
return false;
}
}
}
/// <summary>
/// 处理图片灰度
/// </summary>
/// <param name="original"></param>
/// <returns></returns>
public static Bitmap ZbarMakeGrayscale3(Bitmap original)
{
//create a blank bitmap the same size as original
Bitmap newBitmap = new Bitmap(original.Width, original.Height);
//get a graphics object from the new image
Graphics g = Graphics.FromImage(newBitmap);
//create the grayscale ColorMatrix
System.Drawing.Imaging.ColorMatrix colorMatrix = new System.Drawing.Imaging.ColorMatrix(
new float[][]
{
new float[] {.3f, .3f, .3f, 0, 0},
new float[] {.59f, .59f, .59f, 0, 0},
new float[] {.11f, .11f, .11f, 0, 0},
new float[] {0, 0, 0, 1, 0},
new float[] {0, 0, 0, 0, 1}
});
//create some image attributes
ImageAttributes attributes = new ImageAttributes();
//set the color matrix attribute
attributes.SetColorMatrix(colorMatrix);
//draw the original image on the new image
//using the grayscale color matrix
g.DrawImage(original, new Rectangle(0, 0, original.Width, original.Height),
0, 0, original.Width, original.Height, GraphicsUnit.Pixel, attributes);
//dispose the Graphics object
g.Dispose();
return newBitmap;
}
#endregion
}
}
下载地址我已上传到CSDN，可以访问 https://download.csdn.net/download/fandoc/11180026 下载
