WPF实现调用本机摄像头的示例代码 WPF实现调用本机摄像头的示例

此项目使用了OpenCVSharp加载本地摄像头，多个摄像头支持切换展示，也可以展示rtsp地址。
使用NuGet如下：

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代码如下
一、创建MainWindow.xaml代码如下。

二、MainWindow.xaml.cs代码如下。

using OpenCvSharp; using OpenCvSharp.Extensions; using System; using System.Collections.Generic; using System.Drawing; using System.Drawing.Imaging; using System.IO; using System.Management; using System.Threading; using System.Windows; using System.Windows.Controls; using System.Windows.Media.Imaging; using System.Windows.Threading; namespace OpenCVSharpExample{/// /// MainWindow.xaml 的交互逻辑/// public partial class MainWindow{private VideoCapture capCamera; private Mat matImage = new Mat(); private Thread cameraThread; public List CameraArray{get { return (List)GetValue(CameraArrayProperty); }set { SetValue(CameraArrayProperty, value); }}public static readonly DependencyProperty CameraArrayProperty =DependencyProperty.Register("CameraArray", typeof(List), typeof(MainWindow), new PropertyMetadata(null)); public int CameraIndex{get { return (int)GetValue(CameraIndexProperty); }set { SetValue(CameraIndexProperty, value); }}public static readonly DependencyProperty CameraIndexProperty =DependencyProperty.Register("CameraIndex", typeof(int), typeof(MainWindow), new PropertyMetadata(0)); public MainWindow(){InitializeComponent(); Width = SystemParameters.WorkArea.Width / 1.5; Height = SystemParameters.WorkArea.Height / 1.5; this.Loaded += MainWindow_Loaded; }private void MainWindow_Loaded(object sender, RoutedEventArgs e){InitializeCamera(); }private void ComboBoxCamera_SelectionChanged(object sender, SelectionChangedEventArgs e){if (CameraArray.Count - 1 < CameraIndex)return; if (capCamera != null && cameraThread != null){cameraThread.Abort(); StopDispose(); }capCamera = new VideoCapture(CameraIndex); capCamera.Fps = 30; CreateCamera(); }private void InitializeCamera(){CameraArray = GetAllConnectedCameras(); }List GetAllConnectedCameras(){var cameraNames = new List(); using (var searcher = new ManagementObjectSearcher("SELECT * FROM Win32_PnPEntity WHERE (PNPClass = 'Image' OR PNPClass = 'Camera')")){foreach (var device in searcher.Get()){cameraNames.Add(device["Caption"].ToString()); }}return cameraNames; }void CreateCamera(){cameraThread = new Thread(PlayCamera); cameraThread.Start(); }private void PlayCamera(){while (capCamera != null && !capCamera.IsDisposed){capCamera.Read(matImage); if (matImage.Empty()) break; Dispatcher.BeginInvoke(DispatcherPriority.Normal, new Action(() =>{var converted = Convert(BitmapConverter.ToBitmap(matImage)); imgViewport.Source = converted; })); }}private void btStop_Click(object sender, RoutedEventArgs e){StopDispose(); btStop.IsEnabled = false; }void StopDispose(){if (capCamera != null && capCamera.IsOpened()){capCamera.Dispose(); capCamera = null; }}void CreateRecord(){cameraThread = new Thread(PlayCamera); cameraThread.Start(); }BitmapImage Convert(Bitmap src){System.Drawing.Image img = src; var now = DateTime.Now; var g = Graphics.FromImage(img); var brush = new SolidBrush(System.Drawing.Color.Red); g.DrawString($"北京时间：{ now.ToString("yyyy年MM月dd日 HH:mm:ss")}", new System.Drawing.Font("Arial", 18), brush, new PointF(5, 5)); brush.Dispose(); g.Dispose(); MemoryStream ms = new MemoryStream(); img.Save(ms, ImageFormat.Bmp); ms.Seek(0, SeekOrigin.Begin); BitmapImage image = new BitmapImage(); image.BeginInit(); image.StreamSource = ms; image.EndInit(); image.Freeze(); return image; }protected override void OnClosed(EventArgs e){StopDispose(); }}}

效果预览

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源码地址如下
Github：https://github.com/WPFDevelopersOrg
【WPF实现调用本机摄像头的示例代码】https://github.com/WPFDevelopersOrg/OpenCVSharpExample
Gitee：https://gitee.com/WPFDevelopersOrg
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