private unsafe bool FindEyesFromDifferenceImage(FastBitmap img, FastBitmap differenceImage, out EyeData leftEye, out EyeData rightEye)
{
leftEye = null;
rightEye = null;
if (thresholdElapsedTime < 0)
{
thresholdElapsedTime = 0;
stopwatch.Reset();
stopwatch.Start();
}
else
{
thresholdElapsedTime += stopwatch.ElapsedMilliseconds / 1000f;
stopwatch.Reset();
stopwatch.Start();
}
FastBitmap.ConnectedComponentsResults ccResults = differenceImage.FindConnectedComponents(100, 2, 10);
if (ccResults.NumberOfComponents >= 2 && ccResults.NumberOfComponents <= MaxNumberOfConnectedComponents)
{
LinkedList <BlinkVector> vectors = GetBlinkVectors(ccResults);
if (vectors.Count > 0)
{
float minDistanceSquared = float.PositiveInfinity;
BlinkVector bestVector = null;
float mahalanobisDistanceSquaredThreshold = MahalanobisDistanceSquaredThreshold;
float minimumNcc = MinimumNcc;
foreach (BlinkVector v in vectors)
{
float tempDistSquared = v.GetMahalanobisDistanceSquared(AverageVector, InverseCovarianceMatrix);
if (tempDistSquared < minDistanceSquared)
{
bestVector = v;
minDistanceSquared = tempDistSquared;
}
}
if (minDistanceSquared <= mahalanobisDistanceSquaredThreshold)
{
try
{
float ncc = HorizontalFlipNccTemplateMatch(img, ccResults.Centers[bestVector.LeftEyeLabel], ccResults.Centers[bestVector.RightEyeLabel]);
if (ncc > minimumNcc)
{
leftEye = new EyeData(ccResults.Centers[bestVector.LeftEyeLabel], ccResults.BoundingBoxes[bestVector.LeftEyeLabel]);
rightEye = new EyeData(ccResults.Centers[bestVector.RightEyeLabel], ccResults.BoundingBoxes[bestVector.RightEyeLabel]);
return(true);
}
return(false);
}
catch (ArgumentOutOfRangeException) { }
}
}
}
return(false);
}
