/// <summary>
/// Creates an instance of FaceDetector. Once created, the two arguments cannot be changed for this instance.
/// If using high accuracy, the preprocessImageScale property is set to 1.0, otherwise defaults to 0.125.
/// </summary>
/// <param name="useHighAccuracy">Thether to use high accuracy for detection.</param>
/// <param name="trackFaces">Whether to track faces in live video or successive image detections; available ONLY in iOS 6.0 and later.</param>
public FaceDetector(bool useHighAccuracy = false, bool trackFaces = false)
{
// setup face detector
var context = CIContext.Context((Dictionary <object, object>)null);
var opts = new Dictionary <object, object>();
opts[CIDetector.Accuracy] = useHighAccuracy ? CIDetector.AccuracyHigh : CIDetector.AccuracyLow;
opts[CIDetector.Tracking] = trackFaces ? 1 : 0;
_detector = CIDetector.DetectorOfType(CIDetector.TypeFace, context, opts);
if (useHighAccuracy)
{
preprocessImageScale = 1.0f;
}
}