filter 179 modules/cudafilters/src/cuda/column_filter.hpp namespace filter filter 178 modules/cudafilters/src/cuda/row_filter.hpp namespace filter filter 306 modules/cudafilters/src/filtering.cpp namespace filter filter 478 modules/photo/src/npr.hpp void Domain_Filter::filter(const Mat &img, Mat &res, float sigma_s = 60, float sigma_r = 0.4, int flags = 1)