mergeC4           148 modules/cudev/include/opencv2/cudev/grid/detail/split_merge.hpp         mergeC4<<<grid, block, 0, stream>>>(src1, src2, src3, src4, dst, mask, rows, cols);
mergeC4           180 modules/cudev/include/opencv2/cudev/grid/detail/split_merge.hpp             mergeC4<Policy>(get<0>(src), get<1>(src), get<2>(src), get<3>(src), dst, mask, rows, cols, stream);