Doxygen documentation: cuda submodules reorganized

modules/core/include/opencv2/core/cuda.hpp

@@ -51,15 +51,6 @@
 #include "opencv2/core.hpp"
 #include "opencv2/core/cuda_types.hpp"
 
-/**
-  @addtogroup cuda
-  @{
-    @defgroup cuda_init Initalization and Information
-    @defgroup cuda_struct Data Structures
-    @defgroup cuda_calib3d Camera Calibration and 3D Reconstruction
-  @}
- */
-
 namespace cv { namespace cuda {
 
 //! @addtogroup cuda_struct

modules/cuda/include/opencv2/cuda.hpp

@@ -53,6 +53,9 @@
 @defgroup cuda CUDA-accelerated Computer Vision
     @ref cuda_intro "Introduction page"
     @{
+        @defgroup cuda_init Initalization and Information
+        @defgroup cuda_struct Data Structures
+        @defgroup cuda_calib3d Camera Calibration and 3D Reconstruction
         @defgroup cuda_objdetect Object Detection
     @}