filter2D         4559 modules/imgproc/src/filter.cpp void cv::filter2D( InputArray _src, OutputArray _dst, int ddepth,
filter2D          170 modules/imgproc/src/opencl/filter2D.cl __kernel void filter2D(__global const uchar * srcptr, int src_step, int srcOffsetX, int srcOffsetY, int srcEndX, int srcEndY,
filter2D          777 modules/ts/src/ts_func.cpp void filter2D(const Mat& _src, Mat& dst, int ddepth, const Mat& kernel,