ENH: Add InputSpaceName and OutputSpaceName in Transform

Needed to follow NGFF standards.

Author: PranjalSahu

Modules/Core/Transform/include/itkTransform.h

@@ -115,6 +115,20 @@ class ITK_TEMPLATE_EXPORT Transform : public TransformBaseTemplate<TParametersVa
     return VOutputDimension;
   }
 
+
+  /* For storing the  name of InputSpace */
+  itkSetMacro(InputSpaceName, std::string);
+  itkGetConstReferenceMacro(InputSpaceName, std::string);
+
+  /** For storing the  name of InputSpace/OutputSpace.
+
+  InputSpaceName, OutputSpaceName provide identifiers for the world spaces
+  that the transform applied to and the direction of the spatial transformation.
+  The direction of the transform goes from the input space to output space.
+  Typical values include the names of an atlas or a dataset. */
+  itkSetMacro(OutputSpaceName, std::string);
+  itkGetConstReferenceMacro(OutputSpaceName, std::string);
+
   /** Type of the input parameters. */
   using typename Superclass::FixedParametersType;
   using typename Superclass::FixedParametersValueType;
@@ -593,6 +607,9 @@ class ITK_TEMPLATE_EXPORT Transform : public TransformBaseTemplate<TParametersVa
                                                                  const InverseJacobianPositionType &) const;
 
 private:
+  std::string m_InputSpaceName;
+  std::string m_OutputSpaceName;
+
   template <typename TType>
   static std::string
   GetTransformTypeAsString(TType *)

Modules/Core/Transform/test/itkTransformTest.cxx

@@ -18,7 +18,7 @@
 
 #include <iostream>
 #include <set>
-
+#include "itkTestingMacros.h"
 #include "itkTransform.h"
 
 namespace itk
@@ -308,6 +308,15 @@ class TransformTester
     transform->Print(std::cout);
     std::cout << transform->GetNameOfClass() << std::endl;
 
+    transform->SetObjectName("test_transform");
+    ITK_TEST_EXPECT_EQUAL(std::string("test_transform"), transform->GetObjectName());
+
+    transform->SetInputSpaceName("test_inputspace");
+    ITK_TEST_EXPECT_EQUAL(std::string("test_inputspace"), transform->GetInputSpaceName());
+
+    transform->SetOutputSpaceName("test_outputspace");
+    ITK_TEST_EXPECT_EQUAL(std::string("test_outputspace"), transform->GetOutputSpaceName());
+
     // Test streaming enumeration for TransformBaseTemplateEnums::TransformCategory elements
     const std::set<itk::TransformBaseTemplateEnums::TransformCategory> allTransformCategory{
       itk::TransformBaseTemplateEnums::TransformCategory::UnknownTransformCategory,