getNearestPoint  1133 modules/features2d/include/opencv2/features2d.hpp CV_EXPORTS int getNearestPoint( const std::vector<Point2f>& recallPrecisionCurve, float l_precision );
getNearestPoint   529 modules/features2d/src/evaluation.cpp     int nearestPointIndex = getNearestPoint( recallPrecisionCurve, l_precision );