/// <summary>
/// Start or stop the particle filter.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnProcessFrame_Click(object sender, EventArgs e)
{
try
{
_numParticles = int.Parse(tBoxNumParticles.Text);
_Threshold = double.Parse(tboxThreshold.Text);
_HoldPercentage = float.Parse(tBoxHoldPercent.Text);
_Alpha = float.Parse(tBoxAlpha.Text);
_pixelsToMilliseconds = int.Parse(tBoxPixels.Text);
}
catch (Exception ex)
{
MessageBox.Show("Invalid value in particle text boxes!");
}
if (!_ParticleFilterRunning)
{
SetStatus("Starting", lblStatus);
_ParticleFilterRunning = true;
Thread FilterThread = new Thread(new ThreadStart(ProcessFrame));
_RocketTracking = new Thread(new ThreadStart(TrackAndFireThread));
FilterThread.Start();
btnProcessFrame.Text = "Stop Filter";
}
else
{
SetStatus("Off", lblStatus);
_ParticleFilterRunning = false;
_Filterstopping.WaitOne();
btnProcessFrame.Text = "Start Filter";
pf = null;
}
}
/// <summary>
/// Run the particle filter on its own independent thread.
/// </summary>
private void ProcessFrame()
{
while (_ParticleFilterRunning)
{
if (_currentFrame != null && _trackingImage != null)
{
_newFrame.WaitOne();
_newFrame.Reset();
_frameLock.WaitOne();
var Frame = (Bitmap)_currentFrame.Clone();
_frameLock.Release();
if (pf == null)
{
Bitmap Template = (Bitmap)_trackingImage.Clone();
pf = new ParticleFilter(_numParticles, Template, Frame, _Threshold, _HoldPercentage, _Alpha);
}
pf.processFrame(Frame);
Frame.Dispose();
Pause.WaitOne(100); //Prevents Jerky delayed webcam updates.
}
}
_Filterstopping.Set();
}
