Only features with keypoint.hessian larger than that are extracted. good default value is ~300-500 (can depend on the average local contrast and sharpness of the image). user can further filter out some features based on their hessian values and other characteristics

Namespace:  Emgu.CV
Assembly:  Emgu.CV (in Emgu.CV.dll) Version: 2.2.0.809 (2.2.0.809)

Syntax

         
 C#  Visual Basic  Visual C++ 
public double hessianThreshold
Public hessianThreshold As Double
public:
double hessianThreshold

See Also