compute_k_percentile  114 modules/features2d/src/kaze/AKAZEFeatures.cpp   options_.kcontrast = compute_k_percentile(img, options_.kcontrast_percentile, 1.0f, options_.kcontrast_nbins, 0, 0);
compute_k_percentile  148 modules/features2d/src/kaze/KAZEFeatures.cpp     options_.kcontrast = compute_k_percentile(img, kpercentile, options_.sderivatives, options_.kcontrast_bins, 0, 0);
compute_k_percentile   29 modules/features2d/src/kaze/nldiffusion_functions.h float compute_k_percentile(const cv::Mat& img, float perc, float gscale, int nbins, int ksize_x, int ksize_y);