public void SetHistory(FaceRegion2D parent)
{
Id = parent.Id;
BoundingBoxColor = parent.BoundingBoxColor;
EyeAngle += parent.EyeAngle;
History = parent.History == null
? new[] { new FaceRegion2DHistory(parent) }
: new[] { new FaceRegion2DHistory(parent) }.Union(parent.History).Take(10);
}
private void ProcessFrame()
{
while (_captureContinue)
{
while (_processQueueLength != 2)
{
Thread.Sleep(SLEEP_INTERVAL);
}
if ((Helper2D.FilterInstances.Mode == Mode.Cpu && useGpuMenuItem.Checked)
|| (Helper2D.FilterInstances.Mode == Mode.Gpu && useGpuMenuItem.Checked == false))
{
Helper2D.FilterInstances = new FilterInstances(useGpuMenuItem.Checked ? Mode.Gpu : Mode.Cpu);
}
double distance;
if (_cameras[0].FaceRegions == null
|| _cameras[1].FaceRegions == null)
{
_resetCorrelation = true;
}
if (_resetCorrelation == false)
{
#region Find correlation with previous face regions
// iterate through all cameras and track faces
foreach (var camera in _cameras)
{
var newRawFaceRegions = new List<FaceRegion2D>();
// iterate through every face found previously, rotate image and find faces
foreach (var faceRegion in camera.FaceRegions)
{
var image = camera.Image.Rotate(faceRegion.EyeAngle,
new PointF(faceRegion.Face.Location.X + faceRegion.Face.Width / 2, faceRegion.Face.Location.Y + faceRegion.Face.Height / 2),
INTER.CV_INTER_CUBIC, _rotateBackground, true);
if (_debugRotation)
{
camera.Image = image;
}
// find faces in rotated image
newRawFaceRegions.AddRange(Helper2D.GetFaceRegion2Ds(image, FACE_WIDTH, FACE_HEIGHT, true, false));
}
// find best corespondence between old faces and new faces
IEnumerable<Tuple<int, int>> corespondences = Helper.FindCorespondence
(camera.FaceRegions.Select(item => item.Face.Location).ToArray(),
newRawFaceRegions.Select(item => item.Face.Location).ToArray(),
out distance);
if (corespondences == null
|| corespondences.Any() == false)
{
// face regions lost .. RESET both cameras
_resetCorrelation = true;
break;
}
var newFaceRegions = new FaceRegion2D[corespondences.Count()];
for (int i = 0; i < corespondences.Count(); i++)
{
FaceRegion2D faceRegion = newRawFaceRegions.ElementAt(corespondences.ElementAt(i).Item2);
faceRegion.SetHistory(camera.FaceRegions.ElementAt(corespondences.ElementAt(i).Item1));
newFaceRegions[i] = faceRegion;
}
camera.FaceRegions = newFaceRegions;
}
#endregion
}
if (_resetCorrelation)
{
#region Reset Found Faces
foreach (var camera in _cameras)
{
camera.FaceRegions = Helper2D.GetFaceRegion2Ds(camera.Image, FACE_WIDTH, FACE_HEIGHT, true, false);
}
#endregion
}
if (_cameras[0].FaceRegions.Length > 0
&& _cameras[1].FaceRegions.Length > 0)
{
#region Find correlation in stereo images and add history
IEnumerable<Tuple<int, int>> correlations;
var points = _cameras.Select(camera => camera.FaceRegions.
Select(region => region.Face.Location)).ToArray();
correlations = Helper.FindCorespondence(points.ElementAt(0), points.ElementAt(1), out distance);
// images have incorect correlations and history
if (_resetCorrelation == false
&& correlations.Any(item => _cameras[0].FaceRegions.ElementAt(item.Item1).Id != _cameras[1].FaceRegions.ElementAt(item.Item2).Id))
{
_resetCorrelation = true;
}
if (_resetCorrelation)
{
// assign faces color and Id
foreach (var correlation in correlations)
{
var color = new Bgr(_random.NextDouble() * 255, _random.NextDouble() * 255, _random.NextDouble() * 255);
var leftFaceRegion = _cameras[0].FaceRegions.ElementAt(correlation.Item1);
var rightFaceRegion = _cameras[1].FaceRegions.ElementAt(correlation.Item2);
rightFaceRegion.Id = leftFaceRegion.Id;
leftFaceRegion.BoundingBoxColor = color;
rightFaceRegion.BoundingBoxColor = color;
}
}
#endregion
#region Recognize Faces
_cameras.ForEach(camera =>
{
if (camera.FaceRegions != null)
{
camera.FaceRegions.ToList().ForEach(faceRegion =>
{
Helper.DrawFaceRegionCircle(camera.Image, faceRegion, faceRegion.BoundingBoxColor);
var label = HelperFaces.Recognize(faceRegion.FaceImage);
camera.Image.Draw(string.Format("{0}", label),
ref _font, faceRegion.Face.Location, new Bgr(0, 0, 255));
});
}
});
#endregion
var facesAvailableHandler = FacesAvailable;
if (facesAvailableHandler != null)
{
facesAvailableHandler(this, new FaceRegionsEventArgs(_cameras[0].FaceRegions, _cameras[1].FaceRegions, null));
}
_faces = _cameras.SelectMany(camera => camera.FaceRegions).Select(item => item.FaceImage).ToArray();
}
_resetCorrelation = false;
PostProcess();
lock (this)
{
_processQueueLength = 0;
}
}
}
public void SetHistory(FaceRegion2D parent)
{
Id = parent.Id;
BoundingBoxColor = parent.BoundingBoxColor;
EyeAngle += parent.EyeAngle;
History = parent.History == null
? new[] {new FaceRegion2DHistory(parent)}
: new[] {new FaceRegion2DHistory(parent)}.Union(parent.History).Take(10);
}
