How to display webcam images captured with Emgu?

Question

I\'m currently working on a project that use Facial Recognition. I therefore need a way to display the webcam images to the user so he can adjust his face.

I\'ve bee

Answer 1

If you are using WPF and MVVM here is how you would do it using EMGU.

View:

Viewmodel:

namespace HA.FacialRecognition.Enroll.ViewModels
{
public class PhotoCaptureViewModel : INotifyPropertyChanged
{
    public PhotoCaptureViewModel()
    {
        StartVideo();
    }

    private DispatcherTimer Timer { get; set; }

    private Capture Capture { get; set; }

    private BitmapSource _currentFrame;
    public BitmapSource CurrentFrame
    {
        get { return _currentFrame; }
        set
        {
            if (_currentFrame != value)
            {
                _currentFrame = value;
                OnPropertyChanged();
            }
        }
    }

    private void StartVideo()
    {
        Capture = new Capture();
        Timer = new DispatcherTimer();
        //framerate of 10fps
        Timer.Interval = TimeSpan.FromMilliseconds(100);
        Timer.Tick += new EventHandler(async (object s, EventArgs a) =>
        {
            //draw the image obtained from camera
            using (Image frame = Capture.QueryFrame())
            {
                if (frame != null)
                {
                    CurrentFrame = ToBitmapSource(frame);
                }
            }
        });
        Timer.Start();
    }

    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, BitmapSizeOptions.FromEmptyOptions());
            DeleteObject(ptr); //release the HBitmap
            return bs;
        }
    }

    /// 

    /// Delete a GDI object
    /// 
    [DllImport("gdi32")]
    private static extern int DeleteObject(IntPtr o);

    //implementation of INotifyPropertyChanged, viewmodel disposal etc

}