[This is preliminary documentation and is subject to change.]
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.StructureAssembly: Emgu.CV (in Emgu.CV.dll) Version: 2.0.0.0 (2.0.0.0)