halfsample_image  120 modules/features2d/src/kaze/AKAZEFeatures.cpp       halfsample_image(evolution_[i - 1].Lt, evolution_[i].Lt);
halfsample_image   43 modules/features2d/src/kaze/nldiffusion_functions.h void halfsample_image(const cv::Mat& src, cv::Mat& dst);