Merge pull request #18622 from TolyaTalamanov:at/fix-namespace

modules/gapi/include/opencv2/gapi/cpu/gcpukernel.hpp

@@ -443,7 +443,7 @@ struct OCVStCallHelper<Impl, std::tuple<Ins...>, std::tuple<Outs...>> :
 template<class Impl, class K>
 class GCPUKernelImpl: public cv::detail::KernelTag
 {
-    using CallHelper = detail::OCVCallHelper<Impl, typename K::InArgs, typename K::OutArgs>;
+    using CallHelper = cv::detail::OCVCallHelper<Impl, typename K::InArgs, typename K::OutArgs>;
 
 public:
     using API = K;
@@ -497,7 +497,7 @@ private:
 template<typename K, typename Callable>
 gapi::cpu::GOCVFunctor gapi::cpu::ocv_kernel(Callable& c)
 {
-    using P = detail::OCVCallHelper<Callable, typename K::InArgs, typename K::OutArgs>;
+    using P = cv::detail::OCVCallHelper<Callable, typename K::InArgs, typename K::OutArgs>;
     return GOCVFunctor{ K::id()
                       , &K::getOutMeta
                       , std::bind(&P::callFunctor, std::placeholders::_1, std::ref(c))
@@ -507,7 +507,7 @@ gapi::cpu::GOCVFunctor gapi::cpu::ocv_kernel(Callable& c)
 template<typename K, typename Callable>
 gapi::cpu::GOCVFunctor gapi::cpu::ocv_kernel(const Callable& c)
 {
-    using P = detail::OCVCallHelper<Callable, typename K::InArgs, typename K::OutArgs>;
+    using P = cv::detail::OCVCallHelper<Callable, typename K::InArgs, typename K::OutArgs>;
     return GOCVFunctor{ K::id()
                       , &K::getOutMeta
                       , std::bind(&P::callFunctor, std::placeholders::_1, c)