STYLE: Replace Allocate(true) with AllocateInitialized() for readability

AllocateInitialized() is an alias for Allocate(true) introduced in
itkImageBase.h to make zero-initialization intent explicit in code.
Replace all call sites in Modules/ and Examples/.

The trailing "// initialize buffer to zero" comments are also removed
since AllocateInitialized() is self-documenting.

Suggested by N-Dekker in ITK PR InsightSoftwareConsortium#6003.

Author: hjmjohnson

Examples/DataRepresentation/Image/Image3.cxx

@@ -56,7 +56,7 @@ main(int, char *[])
 
   // Pixel data is allocated
   image->SetRegions(region);
-  image->Allocate(true); // initialize buffer to zero
+  image->AllocateInitialized();
 
 
   // Software Guide : BeginLatex

Examples/DataRepresentation/Image/Image4.cxx

@@ -93,7 +93,7 @@ main(int, char *[])
   region.SetIndex(start);
 
   image->SetRegions(region);
-  image->Allocate(true); // initialize buffer to zero
+  image->AllocateInitialized();
 
   // Software Guide : BeginLatex
   //

Examples/Filtering/DigitallyReconstructedRadiograph1.cxx

@@ -381,7 +381,7 @@ main(int argc, char * argv[])
     region.SetIndex(start);
 
     image->SetRegions(region);
-    image->Allocate(true); // initialize to zero.
+    image->AllocateInitialized();
 
     image->Update();
 

Examples/Segmentation/HoughTransform2DCirclesImageFilter.cxx

@@ -203,7 +203,7 @@ main(int argc, char * argv[])
   localOutputImage->SetRegions(region);
   localOutputImage->SetOrigin(localImage->GetOrigin());
   localOutputImage->SetSpacing(localImage->GetSpacing());
-  localOutputImage->Allocate(true); // initializes buffer to zero
+  localOutputImage->AllocateInitialized();
   // Software Guide : EndCodeSnippet
 
 

Examples/Segmentation/HoughTransform2DLinesImageFilter.cxx

@@ -219,7 +219,7 @@ main(int argc, char * argv[])
     localImage->GetLargestPossibleRegion());
   localOutputImage->SetRegions(region);
   localOutputImage->CopyInformation(localImage);
-  localOutputImage->Allocate(true); // initialize buffer to zero
+  localOutputImage->AllocateInitialized();
   // Software Guide : EndCodeSnippet
 
 

Examples/SpatialObjects/ImageMaskSpatialObject.cxx

@@ -76,7 +76,7 @@ main(int, char *[])
   region.SetIndex(index);
 
   image->SetRegions(region);
-  image->Allocate(true); // initialize buffer to zero
+  image->AllocateInitialized();
 
   ImageType::RegionType          insideRegion;
   constexpr ImageType::SizeType  insideSize = { { 30, 30, 30 } };

Modules/IO/TransformMINC/src/itkMINCTransformIO.cxx

@@ -180,7 +180,7 @@ MINCTransformIOTemplate<TParametersValueType>::ReadOneTransform(VIO_General_tran
         {
           LPSgrid->CopyInformation(grid);
           LPSgrid->SetRegions(grid->GetBufferedRegion());
-          LPSgrid->Allocate(true);
+          LPSgrid->AllocateInitialized();
 
           itk::MultiThreaderBase::Pointer mt = itk::MultiThreaderBase::New();
           mt->ParallelizeImageRegion<3>(
@@ -361,7 +361,7 @@ MINCTransformIOTemplate<TParametersValueType>::WriteOneTransform(const int
         typename GridImageType::Pointer rasGrid = GridImageType::New(); // flipped grid for RAS->LPS conversion
         rasGrid->CopyInformation(grid);
         rasGrid->SetRegions(grid->GetBufferedRegion());
-        rasGrid->Allocate(true);
+        rasGrid->AllocateInitialized();
 
         itk::MultiThreaderBase::Pointer mt = itk::MultiThreaderBase::New();
         mt->ParallelizeImageRegion<3>(