GFTTDetector_Impl   50 modules/features2d/src/gftt.cpp     GFTTDetector_Impl( int _nfeatures, double _qualityLevel,
GFTTDetector_Impl  122 modules/features2d/src/gftt.cpp     return makePtr<GFTTDetector_Impl>(_nfeatures, _qualityLevel,