pair_string        99 modules/cudaobjdetect/perf/perf_objdetect.cpp typedef pair<string, string> pair_string;
pair_string        49 modules/cudaoptflow/perf/perf_optflow.cpp typedef pair<string, string> pair_string;
pair_string        52 modules/cudastereo/perf/perf_stereo.cpp typedef std::tr1::tuple<string, string> pair_string;