getScaleStep      326 modules/cudaoptflow/include/opencv2/cudaoptflow.hpp     virtual double getScaleStep() const = 0;
getScaleStep      848 modules/imgproc/include/opencv2/imgproc.hpp     virtual double getScaleStep() const = 0;
getScaleStep      497 modules/video/include/opencv2/video/tracking.hpp     virtual double getScaleStep() const = 0;