private void _motionDetector_MotionDetected(object sender, MotionDetectedEventArgs e)
{
_view.OnMotionDetectionEvent(e.MotionDetectionEvent);
foreach (SecurityEventSubscriber notification in _notifications)
{
notification.Notify(e.MotionDetectionEvent);
}
}
private void DetectMotion()
{
if ((_previousFrame != null) && (_currentFrame != null))
{
Grayscale grayscaleFilter = new Grayscale(0.2125, 0.7154, 0.0721);
using (Bitmap frame1GS = grayscaleFilter.Apply(_previousFrame))
{
using (Bitmap frame2GS = grayscaleFilter.Apply(_currentFrame))
{
Difference differenceFilter = new Difference();
IFilter thresholdFilter = new Threshold(15);
// set backgroud frame as an overlay for difference filter
differenceFilter.OverlayImage = (Bitmap)frame1GS;
// apply the filters
using (Bitmap tmp1 = differenceFilter.Apply((Bitmap)frame2GS))
{
using (Bitmap tmp2 = thresholdFilter.Apply(tmp1))
{
IFilter erosionFilter = new Erosion();
// apply the filter
using (Bitmap tmp3 = erosionFilter.Apply(tmp2))
{
int whitePixelsCount = CalculateWhitePixels(tmp3);
if (whitePixelsCount > 1000)
{
MotionDetectionEvent motionEvent = new MotionDetectionEvent()
{
CameraDevice = _camera,
NumberOfPixelsDetected = whitePixelsCount,
InputDevice = _camera
};
MotionDetectedEventArgs args = new MotionDetectedEventArgs(motionEvent);
OnMotionDetected(args);
}
//// extract red channel from the original image
//IFilter extrachChannel = new ExtractChannel(RGB.R);
//Bitmap redChannel = extrachChannel.Apply(frame2);
//// merge red channel with motion regions
//Merge mergeFilter = new Merge();
//mergeFilter.OverlayImage = tmp3;
//Bitmap tmp4 = mergeFilter.Apply(redChannel);
//// replace red channel in the original image
//ReplaceChannel replaceChannel = new ReplaceChannel(RGB.R, tmp4);
//replaceChannel.ChannelImage = tmp4;
//Bitmap tmp5 = replaceChannel.Apply(frame2);
}
}
}
}
}
}
}
