//! returns the keypoints list used for descriptor extraction (note: by default, these are generated from the DenseFeatureDetector class, and the border points are removed)
//! returns the keypoints list used for descriptor extraction (note: by default, these are generated from the DenseFeatureDetector class, and the border points are removed)
//! sets the keypoints to be used for descriptor extraction, effectively setting the BGModel ROI (note: this function will remove all border keypoints)
//! sets the keypoints to be used for descriptor extraction, effectively setting the BGModel ROI (note: this function will remove all border keypoints)