private void ProcessFrame(Object sender, EventArgs args)
{
try
{
Image <Bgr, Byte> Previous_Frame = new Image <Bgr, Byte>(imgCamUser.Image.Bitmap); //Previiousframe aquired
Image <Bgr, Byte> Difference; //Difference between the two frames
Image <Bgr, Byte> thresholdImage = null;
imgCamUser.Image = _capture.QueryFrame();
Image <Bgr, Byte> Frame = new Image <Bgr, Byte>(imgCamUser.Image.Bitmap);
double ContourThresh = 0.003; //stores alpha for thread access
int Threshold = 60; //stores threshold for thread access
Frame.Convert <Gray, Byte>();
Previous_Frame.Convert <Gray, Byte>();
Difference = Previous_Frame.AbsDiff(Frame); //find the absolute difference
/*Play with the value 60 to set a threshold for movement*/
thresholdImage = Difference.ThresholdBinary(new Bgr(Threshold, Threshold, Threshold), new Bgr(255, 255, 255)); //if value > 60 set to 255, 0 otherwise
picCapturedUser.Image = thresholdImage.Convert <Gray, byte>().Copy();
if (trackingEnabled)
{
//check for motion in the video feed
//the detectMotion function will return true if motion is detected, else it will return false.
//set motionDetected boolean to the returned value.
Image <Gray, byte> imgOutput = thresholdImage.Convert <Gray, byte>().ThresholdBinary(new Gray(100), new Gray(255));
label1.Text = "idle";
Emgu.CV.Util.VectorOfVectorOfPoint contours = new Emgu.CV.Util.VectorOfVectorOfPoint();
Mat hier = new Mat();
CvInvoke.FindContours(imgOutput, contours, hier, Emgu.CV.CvEnum.RetrType.External, Emgu.CV.CvEnum.ChainApproxMethod.ChainApproxSimple);
if (contours.Size > 0)
{
motionDetected = true;
label2.Text = contours.Size.ToString();
}
else
{
//reset our variables if tracking is disabled
motionDetected = false;
label1.Text = "Idle";
}
if (motionDetected)
{
label1.Text = "motion detected";
}
}
/* using (var imageFrame = _capture.QueryFrame().ToImage<Bgr, Byte>())
* {
* if (imageFrame != null)
* {
* var grayframe = imageFrame.Convert<Gray, byte>();
* var faces = _cascadeClassifier.DetectMultiScale(grayframe, 1.1, 10, Size.Empty);
* foreach (var face in faces)
* {
* imageFrame.Draw(face, new Bgr(Color.BurlyWood), 3);
* //render the image to the picture box
* picCapturedUser.Image = imageFrame.Copy(face);
* }
* }
* imgCamUser.Image = imageFrame;
*
*
* }*/
}
catch (Exception e)
{
//MessageBox.Show(e.ToString());
}
}
