i m trying to setup motiondetection using the AForge.NET framework. I m using the information provided on this page.
I ve setup a DirectShow videostream which feeds a part of my desktop through a stream. I can choose this stream in the sample videoplayer project which is provided with AForge. (And I see my desktop through the player).
However, when I run the code below I receive a NullReferenceException. What am I missing?
// New frame received by the player
private void videoSourcePlayer_NewFrame( object sender, ref Bitmap image )
{
if (this.detector.ProcessFrame(image) > 0.02)
{
Console.WriteLine("Motion");
}
else
{
Console.WriteLine("No motion");
}
}
The detector is initialized as private class variable when a videostream is chosen.
private MotionDetector detector;
private BlobCountingObjectsProcessing motionProcessor;
// Open video source
private void OpenVideoSource( IVideoSource source )
{
BlobCountingObjectsProcessing motionProcessor = new BlobCountingObjectsProcessing();
MotionDetector detector = new MotionDetector(
new SimpleBackgroundModelingDetector(),
motionProcessor);
}