private void imageFrameCaptured(object sender, EventArgs e)
{
frameCounter = frameCounter + 1;
// Handle Every Frame if Video is Playing
if (radioButtonVideo.Checked)
{
try
{
if (_capture != null)
{
if (frameCounter == 1)
{
prevFrame = _capture.QueryFrame().ToImage <Gray, byte>().Resize(200, 200, Emgu.CV.CvEnum.Inter.Area);
}
else
{
Image <Bgr, byte> bgrImage = _capture.QueryFrame().ToImage <Bgr, byte>().Resize(400, 400, Emgu.CV.CvEnum.Inter.Area);
for (int i = 0; i < frameSkip; i++)
{
_capture.Grab(); // skip the number of frames
}
_opticalflow = new OpticalFlow(filename, (int)ActivityClass.walking);
nextFrame = _capture.QueryFrame().ToImage <Gray, byte>().Resize(200, 200, Emgu.CV.CvEnum.Inter.Area);
Image <Hsv, byte> outputImg = _opticalflow.CalculateOpticalFlow(prevFrame, nextFrame, frameCounter);
var sample = _opticalflow.GetFeatureMatrix();
int prediction = mlp.Inference(sample);
SetText(Enum.GetName(typeof(ActivityClass), prediction));
opticalViewBox.Image = outputImg.Resize(300, 300, Emgu.CV.CvEnum.Inter.Cubic);
outputImg.Dispose();
//_opticalflow.PyrLkOpticalFlow(prevFrame, nextFrame);
prevFrame.Dispose();
pictureViewBox.Image = bgrImage;
prevFrame = nextFrame.Clone();
nextFrame.Dispose();
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
_capture.Pause();
// detach the callback function
_capture.ImageGrabbed -= imageFrameCaptured;
_capture.Dispose();
_capture = null;
isPlaying = false;
// change the button icon to play
btnPlayPause.BackgroundImage = Properties.Resources.play36;
}
}
// Handle Every Frame if Camera is On
if (radioButtonCamera.Checked)
{
try
{
if (_capture != null)
{
if (frameCounter == 1)
{
_capture.Retrieve(_frame, 0);
prevFrame = _frame.ToImage <Gray, byte>().Resize(200, 200, Emgu.CV.CvEnum.Inter.Cubic);
}
else
{
_capture.Retrieve(_frame, 0);
Image <Bgr, byte> bgrImage = _frame.ToImage <Bgr, byte>().Resize(400, 400, Emgu.CV.CvEnum.Inter.Cubic);
nextFrame = _frame.ToImage <Gray, byte>().Resize(200, 200, Emgu.CV.CvEnum.Inter.Cubic);
_opticalflow = new OpticalFlow("", (int)ActivityClass.walking);
opticalViewBox.Image = _opticalflow.CalculateOpticalFlow(prevFrame, nextFrame, frameCounter).Resize(400, 400, Emgu.CV.CvEnum.Inter.Cubic);
// Predict the Optical Flow Features in Real Time
var sample = _opticalflow.GetFeatureMatrix();
int prediction = mlp.Inference(sample);
SetText(Enum.GetName(typeof(ActivityClass), prediction));
pictureViewBox.Image = bgrImage;
prevFrame.Dispose();
prevFrame = nextFrame.Clone();
nextFrame.Dispose();
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
_capture.Pause();
// detach the callback function
_capture.ImageGrabbed -= imageFrameCaptured;
_capture.Dispose();
_capture = null;
isPlaying = false;
// change the button icon to play
btnPlayPause.BackgroundImage = Properties.Resources.play36;
}
}
}
public void OpticalFlowThread(String filePath, int TotalFrames)
{
//try
//{
Console.WriteLine("Child thread of Optical Flow starts");
String fileName = Path.GetFileName(filePath).Split('.')[0];
VideoCapture capture = new VideoCapture(filePath);
for (int i = 0; i < TotalFrames - 1; i++)
{
try
{
if (capture != null)
{
if (i == 0)
{
prevFrame = capture.QueryFrame().ToImage <Gray, byte>().Resize(200, 200, Emgu.CV.CvEnum.Inter.Area);
}
else
{
for (int j = 0; j < frameSkip; j++)
{
capture.Grab(); // skip the number of frames
i++;
}
_opticalflow = new OpticalFlow(filename, activityLabel);
nextFrame = capture.QueryFrame().ToImage <Gray, byte>().Resize(200, 200, Emgu.CV.CvEnum.Inter.Area);
_opticalflow.CalculateOpticalFlow(prevFrame, nextFrame, frameCounter);
//opticalViewBox.Image = outputImg;
//outputImg.Dispose();
//_opticalflow.PyrLkOpticalFlow(prevFrame, nextFrame);
prevFrame.Dispose();
//pictureViewBox.Image = nextFrame;
prevFrame = nextFrame.Clone();
nextFrame.Dispose();
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
capture.Pause();
capture.Stop();
capture.Dispose();
capture = null;
isPlaying = false;
// change the button icon to play
btnPlayPause.BackgroundImage = Properties.Resources.play36;
}
}
Console.WriteLine("Child thread of Optical Flow Ends");
//}
//catch (ThreadAbortException e)
//{
// Console.WriteLine("Thread Abort Exception");
//}
//finally
//{
// Console.WriteLine("Couldn't catch the Thread Exception");
//}
}
