Question

我使用Emgu CV编写面部检测应用程序。

这是WPF应用程序。

以下是我的xaml的代码：

<Window x:Class="WpfFaceDetectionTest.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="600" Width="800" Loaded="Window_Loaded">
<Grid>
    <Image Name="image1" Stretch="Fill" />
</Grid>

和我的xaml.cs的代码

   using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media.Imaging;
using System.Windows.Threading;
using Emgu.CV.Structure;
using Emgu.CV;
using System.Runtime.InteropServices;

namespace WpfFaceDetectionTest
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {

        private Capture capture;
        private HaarCascade haarCascade;
        DispatcherTimer timer;

        public MainWindow()
        {
            InitializeComponent();
        }

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            capture = new Capture();
            haarCascade = new HaarCascade("C:\\Users\\nemes\\Desktop\\WpfFaceDetectionTest\\haarcascade_frontalface_alt_tree.xml");
            timer = new DispatcherTimer();
            timer.Tick += new EventHandler(timer_Tick);
            timer.Interval = new TimeSpan(0, 0, 0, 0, 1);
            timer.Start();
        }

        void timer_Tick(object sender, EventArgs e)
        {
            Image<Bgr,Byte> currentFrame = capture.QueryFrame();

            if (currentFrame != null)
            {
                Image<Gray, Byte> grayFrame = currentFrame.Convert<Gray, Byte>();

                var detectedFaces = grayFrame.DetectHaarCascade(haarCascade)[0];

                foreach (var face in detectedFaces)
                    currentFrame.Draw(face.rect, new Bgr(0, double.MaxValue, 0), 3);

                image1.Source = ToBitmapSource(currentFrame);
            }

        }

        [DllImport("gdi32")]
        private static extern int DeleteObject(IntPtr o);

        public static BitmapSource ToBitmapSource(IImage image)
        {
            using (System.Drawing.Bitmap source = image.Bitmap)
            {
                IntPtr ptr = source.GetHbitmap(); //obtain the Hbitmap

                BitmapSource bs = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
                    ptr,
                    IntPtr.Zero,
                    Int32Rect.Empty,
                    System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());

                DeleteObject(ptr); //release the HBitmap
                return bs;
            }
        }
    }
}

我的问题是来自网络摄像头的视频流中断了。

如何解决此问题？

感谢您的帮助

人脸检测（Emgu CV）

0 个答案: