ts/ts_perf: fix wrong has() usage

`has()` only tests for an argument presence which is always true for
arguments with default values. Use `get<bool>()` to check the value
instead.

modules/ts/src/ts_perf.cpp

@@ -783,7 +783,7 @@ void TestBase::Init(const std::vector<std::string> & availableImpls,
     ;
 
     cv::CommandLineParser args(argc, argv, command_line_keys);
-    if (args.has("help"))
+    if (args.get<bool>("help"))
     {
         args.printMessage();
         return;
@@ -791,7 +791,7 @@ void TestBase::Init(const std::vector<std::string> & availableImpls,
 
     ::testing::AddGlobalTestEnvironment(new PerfEnvironment);
 
-    param_impl          = args.has("perf_run_cpu") ? "plain" : args.get<std::string>("perf_impl");
+    param_impl          = args.get<bool>("perf_run_cpu") ? "plain" : args.get<std::string>("perf_impl");
     std::string perf_strategy = args.get<std::string>("perf_strategy");
     if (perf_strategy == "default")
     {
@@ -816,24 +816,24 @@ void TestBase::Init(const std::vector<std::string> & availableImpls,
     param_seed          = args.get<unsigned int>("perf_seed");
     param_time_limit    = std::max(0., args.get<double>("perf_time_limit"));
     param_force_samples = args.get<unsigned int>("perf_force_samples");
-    param_write_sanity  = args.has("perf_write_sanity");
-    param_verify_sanity = args.has("perf_verify_sanity");
+    param_write_sanity  = args.get<bool>("perf_write_sanity");
+    param_verify_sanity = args.get<bool>("perf_verify_sanity");
 
 #ifndef WINRT
-    test_ipp_check      = !args.has("perf_ipp_check") ? getenv("OPENCV_IPP_CHECK") != NULL : true;
+    test_ipp_check      = !args.get<bool>("perf_ipp_check") ? getenv("OPENCV_IPP_CHECK") != NULL : true;
 #else
     test_ipp_check = false;
 #endif
     param_threads       = args.get<int>("perf_threads");
 #ifdef CV_COLLECT_IMPL_DATA
-    param_collect_impl  = args.has("perf_collect_impl");
+    param_collect_impl  = args.get<bool>("perf_collect_impl");
 #endif
 #ifdef ANDROID
     param_affinity_mask   = args.get<int>("perf_affinity_mask");
     log_power_checkpoints = args.has("perf_log_power_checkpoints");
 #endif
 
-    bool param_list_impls = args.has("perf_list_impls");
+    bool param_list_impls = args.get<bool>("perf_list_impls");
 
     if (param_list_impls)
     {
@@ -861,7 +861,7 @@ void TestBase::Init(const std::vector<std::string> & availableImpls,
 
 #ifdef HAVE_CUDA
 
-    bool printOnly        = args.has("perf_cuda_info_only");
+    bool printOnly        = args.get<bool>("perf_cuda_info_only");
 
     if (printOnly)
         exit(0);