ENH: Support nearest neighbor interpolator for montaging label maps

Co-authored-by: Matt McCormick <[email protected]>

wrapping/itkTileMergeImageFilter.wrap

@@ -1,13 +1,22 @@
+itk_wrap_include("itkLinearInterpolateImageFunction.h")
+itk_wrap_include("itkNearestNeighborInterpolateImageFunction.h")
 itk_wrap_class("itk::TileMergeImageFilter" POINTER)
-  foreach(d ${ITK_WRAP_IMAGE_DIMS})
-    foreach(t ${WRAP_ITK_SCALAR})
-      itk_wrap_template("${ITKM_I${t}${d}}" "${ITKT_I${t}${d}}, double")
-    endforeach()
-    foreach(t ${WRAP_ITK_RGB})
-      itk_wrap_template("${ITKM_I${t}${d}}" "${ITKT_I${t}${d}}, itk::RGBPixel<float>")
-    endforeach()
-    foreach(t ${WRAP_ITK_RGBA})
-      itk_wrap_template("${ITKM_I${t}${d}}" "${ITKT_I${t}${d}}, itk::RGBAPixel<float>")
+  foreach(iif LinearInterpolateImageFunction NearestNeighborInterpolateImageFunction)
+    if (${iif} STREQUAL "LinearInterpolateImageFunction")
+      set(abbr "L")  # abbreviation to use in Python wrapping type name
+    else()
+      set(abbr "NN")
+    endif()
+    foreach(d ${ITK_WRAP_IMAGE_DIMS})
+      foreach(t ${WRAP_ITK_SCALAR})
+        itk_wrap_template("${ITKM_I${t}${d}}${abbr}" "${ITKT_I${t}${d}}, double, itk::${iif}<${ITKT_I${t}${d}}>")
+      endforeach()
+      foreach(t ${WRAP_ITK_RGB})
+        itk_wrap_template("${ITKM_I${t}${d}}${abbr}" "${ITKT_I${t}${d}}, itk::RGBPixel<float>, itk::${iif}<${ITKT_I${t}${d}}>")
+      endforeach()
+      foreach(t ${WRAP_ITK_RGBA})
+        itk_wrap_template("${ITKM_I${t}${d}}${abbr}" "${ITKT_I${t}${d}}, itk::RGBAPixel<float>, itk::${iif}<${ITKT_I${t}${d}}>")
+      endforeach()
     endforeach()
   endforeach()
 itk_end_wrap_class()

wrapping/itkTileMontage.wrap

@@ -2,6 +2,7 @@ itk_wrap_class("itk::TileMontage" POINTER)
   foreach(d ${ITK_WRAP_IMAGE_DIMS})
     foreach(t ${WRAP_ITK_SCALAR})
       itk_wrap_template("${ITKM_I${t}${d}}${ITKM_F}" "${ITKT_I${t}${d}},${ITKT_F}")
+      itk_wrap_template("${ITKM_I${t}${d}}${ITKM_D}" "${ITKT_I${t}${d}},${ITKT_D}")
     endforeach()
   endforeach()
 itk_end_wrap_class()