BriskScaleSpace 218 modules/features2d/src/brisk.cpp class CV_EXPORTS BriskScaleSpace BriskScaleSpace 829 modules/features2d/src/brisk.cpp BriskScaleSpace::BriskScaleSpace(int _octaves) BriskScaleSpace 836 modules/features2d/src/brisk.cpp BriskScaleSpace::~BriskScaleSpace()