Threshold for the keypoint detector. Only features, whose hessian is larger than hessianThreshold are retained by the detector. Therefore, the larger the value, the less keypoints you will get. A good default value could be from 300 to 500, depending from the image contrast.

public double HessianThreshold { get; set; }

Public Property HessianThreshold As Double
	Get
	Set

public:
property double HessianThreshold {
	double get ();
	void set (double value);
}

member HessianThreshold : float with get, set