Merge pull request #20107 from sivanov-work:gapi_transpose_op

G-API: Add transpose operation

* Add kernels decl & def

* Add draft for UT

* Fix UT for Transpose

* Add perf test

* Fix docs

* Apply comments

modules/gapi/src/api/kernels_core.cpp

@@ -417,6 +417,12 @@ std::tuple<GOpaque<double>,GArray<int>,GArray<Point3f>> kmeans(const GArray<Poin
     return core::GKMeans3D::on(data, K, bestLabels, criteria, attempts, flags);
 }
 
+
+GMat transpose(const GMat& src)
+{
+    return core::GTranspose::on(src);
+}
+
 GOpaque<Size> streaming::size(const GMat& src)
 {
     return streaming::GSize::on(src);

modules/gapi/src/backends/cpu/gcpucore.cpp

@@ -634,6 +634,15 @@ GAPI_OCV_KERNEL(GCPUKMeans3D, cv::gapi::core::GKMeans3D)
     }
 };
 
+GAPI_OCV_KERNEL(GCPUTranspose, cv::gapi::core::GTranspose)
+{
+    static void run(const cv::Mat& in, cv::Mat& out)
+    {
+        cv::transpose(in, out);
+    }
+};
+
+
 GAPI_OCV_KERNEL(GCPUParseSSDBL, cv::gapi::nn::parsers::GParseSSDBL)
 {
     static void run(const cv::Mat&  in_ssd_result,
@@ -774,6 +783,7 @@ cv::gapi::GKernelPackage cv::gapi::core::cpu::kernels()
          , GCPUKMeansNDNoInit
          , GCPUKMeans2D
          , GCPUKMeans3D
+         , GCPUTranspose
          , GCPUParseSSDBL
          , GOCVParseSSD
          , GCPUParseYolo

modules/gapi/src/backends/ocl/goclcore.cpp

@@ -522,6 +522,15 @@ GAPI_OCL_KERNEL(GOCLConvertTo, cv::gapi::core::GConvertTo)
     }
 };
 
+
+GAPI_OCL_KERNEL(GOCLTranspose, cv::gapi::core::GTranspose)
+{
+    static void run(const cv::UMat& in,  cv::UMat& out)
+    {
+        cv::transpose(in, out);
+    }
+};
+
 cv::gapi::GKernelPackage cv::gapi::core::ocl::kernels()
 {
     static auto pkg = cv::gapi::kernels
@@ -586,6 +595,7 @@ cv::gapi::GKernelPackage cv::gapi::core::ocl::kernels()
          , GOCLConcatVert
          , GOCLLUT
          , GOCLConvertTo
+         , GOCLTranspose
          >();
     return pkg;
 }