The facialdetection from ledrunning

ledrunning / facialdetection Goto Github PK

View Code? Open in Web Editor NEW

Simple WPF MVVM Desktop application for facial detection in real time from web camera via Emgu

C# 100.00%

facialdetection's People

Contributors

Stargazers

Watchers

facialdetection's Issues

The Convert function in the ValueConverter always throws an exception

May I ask why occasionally an exception is thrown when converting Bitmap to BitmapImage in the BitmapSourceConvert class? The exception content is: System. Runtime. InteropServices. ExternalException (0x80004005): A general error occurred in GDI+.
Strangely, if I abandon the MVVM mode and directly rewrite the Convert function in BitmapSourceConvert in MainWindow. CS file, it will not throw an exception:

        private void Capture_ImageGrabbed(object sender, EventArgs e)
        {
                Mat mat = new Mat();
                bool b = capture.Retrieve(mat, 0);
                if (b && !mat.IsEmpty)
                {
                      this.Dispatcher.Invoke(new Action(() =>
                      {
                          image1.Source = Bitmap2BitmapImage(mat.Bitmap);
                      }));
                }
        }
        private BitmapImage Bitmap2BitmapImage(Bitmap bitmap)
        {
            using (var memoryStream = new MemoryStream())
            {
                try
                {
                    bitmap.Save(memoryStream, ImageFormat.Bmp);
                    BitmapImage image = new BitmapImage();
                    image.BeginInit();
                    memoryStream.Seek(0, SeekOrigin.Begin);
                    image.StreamSource = new MemoryStream(memoryStream.ToArray());
                    image.EndInit();
                    return image;
                }
                catch (Exception e)
                {
                    Console.WriteLine(e.ToString());
                }

                return new BitmapImage();
            }
        }

I want to know why.

Recommend Projects