ENH: Wrap LabelSetMeasures in LabelOverlapMeasuresImageFilter

This exposes the return value from
itk::LabelOverlapMeasuresImageFilter::GetLabelSetMeasures()
as a Python dictionary instead of
<Swig Object of type 'std::unordered_map< unsigned char,itkLabelOverlapMeasuresImageFilterIUC3::LabelSetMeasures > *'>
This is needed for convenient use of the class from Python.

Modules/Filtering/ImageStatistics/wrapping/CMakeLists.txt

@@ -1,2 +1,6 @@
 itk_wrap_module(ITKImageStatistics)
+if(ITK_WRAP_PYTHON)
+  set(WRAPPER_SUBMODULE_ORDER itkLabelOverlapMeasuresImageFilter_LabelSetMeasures)
+  list(APPEND WRAPPER_SWIG_LIBRARY_FILES "${CMAKE_CURRENT_LIST_DIR}/itkLabelOverlapMeasuresImageFilter.i")
+endif()
 itk_auto_load_and_end_wrap_submodules()

Modules/Filtering/ImageStatistics/wrapping/itkLabelOverlapMeasuresImageFilter.i

@@ -0,0 +1,10 @@
+%include <std_unordered_map.i>
+
+%template(hashmapUCLOMIFLSM)    std::unordered_map< unsigned char, itk::LabelOverlapMeasuresImageFilter::LabelSetMeasures >;
+%template(hashmapSCLOMIFLSM)    std::unordered_map< signed char, itk::LabelOverlapMeasuresImageFilter::LabelSetMeasures >;
+%template(hashmapUSLOMIFLSM)    std::unordered_map< unsigned short, itk::LabelOverlapMeasuresImageFilter::LabelSetMeasures >;
+%template(hashmapSSLOMIFLSM)    std::unordered_map< signed short, itk::LabelOverlapMeasuresImageFilter::LabelSetMeasures >;
+%template(hashmapULLOMIFLSM)    std::unordered_map< unsigned long, itk::LabelOverlapMeasuresImageFilter::LabelSetMeasures >;
+%template(hashmapSLLOMIFLSM)    std::unordered_map< signed long, itk::LabelOverlapMeasuresImageFilter::LabelSetMeasures >;
+%template(hashmapULLLOMIFLSM)   std::unordered_map< unsigned long long, itk::LabelOverlapMeasuresImageFilter::LabelSetMeasures >;
+%template(hashmapSLLLOMIFLSM)   std::unordered_map< signed long long, itk::LabelOverlapMeasuresImageFilter::LabelSetMeasures >;

Modules/Filtering/ImageStatistics/wrapping/itkLabelOverlapMeasuresImageFilter_LabelSetMeasures.wrap

@@ -0,0 +1,4 @@
+set(WRAPPER_AUTO_INCLUDE_HEADERS OFF)
+itk_wrap_include("itkLabelOverlapMeasuresImageFilter.h")
+itk_wrap_simple_class("itk::LabelOverlapMeasuresImageFilter<itk::Image<unsigned short, 2> >::LabelSetMeasures")
+set(WRAPPER_AUTO_INCLUDE_HEADERS ON)

Wrapping/Generators/Python/PyBase/pyBase.i

@@ -23,6 +23,7 @@ from . import _ITKCommonPython
 %include <std_pair.i>
 %include <std_vector.i>
 %include <std_map.i>
+%include <std_unordered_map.i>
 %include <std_list.i>
 %include <std_set.i>