STYLE: Use Image::CreateInitialized(const RegionType &) in tests

Replaced more than sixty cases of code like:

    auto image = ImageType::New();
    image->SetRegions(region);
    image->AllocateInitialized();

with the following single statement:

    auto image = ImageType::CreateInitialized(region);

in ITK test files ("itk*Test*.cxx").

Modules/Core/Common/test/itkAdaptorComparisonTest.cxx

@@ -195,11 +195,9 @@ itkAdaptorComparisonTest(int, char *[])
   region.SetSize(size);
   region.SetIndex(index);
 
-  auto scalar_image = ScalarImageType::New();
-  auto vector_image = VectorImageType::New();
+  auto scalar_image = ScalarImageType::CreateInitialized(region);
 
-  scalar_image->SetRegions(region);
-  scalar_image->AllocateInitialized();
+  auto vector_image = VectorImageType::New();
 
   vector_image->SetRegions(region);
   vector_image->Allocate();

Modules/Core/Common/test/itkBSplineInterpolationWeightFunctionTest.cxx

@@ -275,13 +275,11 @@ itkBSplineInterpolationWeightFunctionTest(int, char *[])
     auto kernel = KernelType::New();
 
     using ImageType = itk::Image<char, SpaceDimension>;
-    auto                  image = ImageType::New();
     ImageType::RegionType region;
     region.SetIndex(startIndex);
     region.SetSize(size);
 
-    image->SetRegions(region);
-    image->AllocateInitialized();
+    auto image = ImageType::CreateInitialized(region);
 
     using IteratorType = itk::ImageRegionConstIteratorWithIndex<ImageType>;
     IteratorType  iter(image, image->GetBufferedRegion());

Modules/Core/Common/test/itkConnectedImageNeighborhoodShapeGTest.cxx

@@ -248,11 +248,9 @@ TEST(ConnectedImageNeighborhoodShape, SupportsConstShapedNeighborhoodIterator)
   using OffsetType = itk::Offset<ImageDimension>;
 
   // Create a "dummy" image.
-  const auto image = ImageType::New();
-  SizeType   imageSize;
+  SizeType imageSize;
   imageSize.Fill(1);
-  image->SetRegions(imageSize);
-  image->AllocateInitialized();
+  const auto image = ImageType::CreateInitialized(imageSize);
 
   // Create a radius, (just) large enough for all offsets activated below here.
   SizeType radius;

Modules/Core/Common/test/itkImageAlgorithmCopyTest2.cxx

@@ -79,14 +79,8 @@ itkImageAlgorithmCopyTest2(int, char *[])
   image1->Allocate();
   image1->FillBuffer(13);
 
-  auto image2 = Short3DImageType::New();
-  image2->SetRegions(region);
-  image2->AllocateInitialized();
-
-
-  auto image3 = Float3DImageType::New();
-  image3->SetRegions(region);
-  image3->AllocateInitialized();
+  auto image2 = Short3DImageType::CreateInitialized(region);
+  auto image3 = Float3DImageType::CreateInitialized(region);
 
   std::cout << "Copying two images of same type" << std::endl;
   itk::ImageAlgorithm::Copy(image1.GetPointer(), image2.GetPointer(), region, region);

Modules/Core/Common/test/itkImageDuplicatorTest.cxx

@@ -41,9 +41,7 @@ itkImageDuplicatorTest(int, char *[])
   {
     /** Create an image image */
     std::cout << "Creating simulated image: ";
-    auto m_Image = ImageType::New();
-    m_Image->SetRegions(region);
-    m_Image->AllocateInitialized();
+    auto m_Image = ImageType::CreateInitialized(region);
 
     itk::ImageRegionIterator<ImageType> it(m_Image, region);
     it.GoToBegin();

Modules/Core/Common/test/itkImageGTest.cxx

@@ -83,11 +83,7 @@ void
 Expect_allocated_initialized_image_equal_to_itself()
 {
   using SizeType = typename TImage::SizeType;
-
-  const auto image = TImage::New();
-  image->SetRegions(SizeType::Filled(2));
-  image->AllocateInitialized();
-
+  const auto image = TImage::CreateInitialized(SizeType::Filled(2));
   Expect_equal_to_itself(*image);
 }
 
@@ -98,13 +94,8 @@ Expect_unequal_when_sizes_differ()
 {
   using SizeType = typename TImage::SizeType;
 
-  const auto image1 = TImage::New();
-  image1->SetRegions(SizeType::Filled(2));
-  image1->AllocateInitialized();
-
-  const auto image2 = TImage::New();
-  image2->SetRegions(SizeType::Filled(3));
-  image2->AllocateInitialized();
+  const auto image1 = TImage::CreateInitialized(SizeType::Filled(2));
+  const auto image2 = TImage::CreateInitialized(SizeType::Filled(3));
 
   Expect_unequal(*image1, *image2);
 }

Modules/Core/Common/test/itkImageRandomIteratorTest2.cxx

@@ -43,8 +43,6 @@ itkImageRandomIteratorTest2(int argc, char * argv[])
 
   using ImageType = itk::Image<PixelType, ImageDimension>;
 
-  auto image = ImageType::New();
-
   ImageType::SizeType size;
 
   size[0] = 1000;
@@ -59,8 +57,7 @@ itkImageRandomIteratorTest2(int argc, char * argv[])
   region.SetIndex(start);
   region.SetSize(size);
 
-  image->SetRegions(region);
-  image->AllocateInitialized();
+  auto image = ImageType::CreateInitialized(region);
 
   using RandomIteratorType = itk::ImageRandomIteratorWithIndex<ImageType>;
 

Modules/Core/Common/test/itkImageRegionRangeGTest.cxx

@@ -628,13 +628,10 @@ TEST(ImageRegionRange, ThrowsInReleaseWhenIterationRegionIsOutsideBufferedRegion
   using SizeType = ImageType::SizeType;
   using RegionType = ImageType::RegionType;
 
-  const auto image = ImageType::New();
-
   const IndexType imageIndex{ { -1, -2 } };
   const SizeType  imageSize{ { 3, 4 } };
 
-  image->SetRegions(RegionType{ imageIndex, imageSize });
-  image->AllocateInitialized();
+  const auto image = ImageType::CreateInitialized({ imageIndex, imageSize });
 
   Check_Range_constructor_throws_ExceptionObject_when_iteration_region_is_outside_of_buffered_region(
     *image, RegionType{ imageIndex, imageSize + SizeType::Filled(1) });

Modules/Core/Common/test/itkLineIteratorTest.cxx

@@ -52,9 +52,7 @@ itkLineIteratorTest(int argc, char * argv[])
   region.SetIndex(index);
   region.SetSize(size);
 
-  auto output = ImageType::New();
-  output->SetRegions(region);
-  output->AllocateInitialized();
+  auto output = ImageType::CreateInitialized(region);
 
   // First test: empty line
   IndexType startIndex;

Modules/Core/Common/test/itkShapedImageNeighborhoodRangeGTest.cxx

@@ -1004,9 +1004,7 @@ TEST(ShapedImageNeighborhoodRange, SupportsArbitraryBufferedRegionIndex)
 
   const ImageType::RegionType bufferedRegion{ arbitraryIndex, imageSize };
 
-  const auto image = ImageType::New();
-  image->SetRegions(bufferedRegion);
-  image->AllocateInitialized();
+  const auto image = ImageType::CreateInitialized(bufferedRegion);
 
   // Set a 'magic value' at the begin of the buffered region.
   const ImageType::PixelType   magicPixelValue = 42;

Modules/Core/Common/test/itkSobelOperatorImageConvolutionTest.cxx

@@ -64,9 +64,7 @@ DoConvolution(typename ImageType::Pointer inputImage, unsigned long int directio
 
   NeighborhoodIteratorType it(radius, inputImage, inputImage->GetRequestedRegion());
 
-  auto outputImage = ImageType::New();
-  outputImage->SetRegions(inputImage->GetRequestedRegion());
-  outputImage->AllocateInitialized();
+  auto outputImage = ImageType::CreateInitialized(inputImage->GetRequestedRegion());
 
   IteratorType                             out(outputImage, inputImage->GetRequestedRegion());
   itk::NeighborhoodInnerProduct<ImageType> innerProduct;

Modules/Core/GPUCommon/test/itkGPUImageTest.cxx

@@ -70,9 +70,7 @@ itkGPUImageTest(int argc, char * argv[])
   srcB->Allocate();
   srcB->FillBuffer(3.0f);
 
-  dest = ItkImage1f::New();
-  dest->SetRegions(region);
-  dest->AllocateInitialized();
+  dest = ItkImage1f::CreateInitialized(region);
 
   // check pixel value
   ItkImage1f::IndexType idx;

Modules/Core/ImageFunction/test/itkBinaryThresholdImageFunctionTest.cxx

@@ -29,7 +29,6 @@ itkBinaryThresholdImageFunctionTest(int, char *[])
 
   using FloatImage = itk::Image<float, 3>;
 
-  auto                   image = FloatImage::New();
   FloatImage::RegionType region;
   FloatImage::SizeType   size;
   size.Fill(64);
@@ -39,8 +38,7 @@ itkBinaryThresholdImageFunctionTest(int, char *[])
   region.SetIndex(index);
   region.SetSize(size);
 
-  image->SetRegions(region);
-  image->AllocateInitialized();
+  auto image = FloatImage::CreateInitialized(region);
 
   for (unsigned int i = 0; i < FloatImage::ImageDimension; ++i)
   {

Modules/Core/ImageFunction/test/itkGaussianBlurImageFunctionTest.cxx

@@ -29,7 +29,6 @@ itkGaussianBlurImageFunctionTest(int, char *[])
   using GFunctionType = itk::GaussianBlurImageFunction<ImageType>;
 
   // Create and allocate the image
-  auto                  image = ImageType::New();
   ImageType::SizeType   size;
   ImageType::IndexType  start;
   ImageType::RegionType region;
@@ -41,8 +40,7 @@ itkGaussianBlurImageFunctionTest(int, char *[])
   region.SetIndex(start);
   region.SetSize(size);
 
-  image->SetRegions(region);
-  image->AllocateInitialized();
+  auto image = ImageType::CreateInitialized(region);
 
   // Fill the image with a straight line
   for (unsigned int i = 0; i < 50; ++i)

Modules/Core/ImageFunction/test/itkGaussianDerivativeImageFunctionTest.cxx

@@ -29,7 +29,6 @@ TestGaussianDerivativeImageFunction()
   using ImageType = itk::Image<PixelType, Dimension>;
 
   // Create and allocate the image
-  auto                           image = ImageType::New();
   typename ImageType::SizeType   size;
   typename ImageType::IndexType  start;
   typename ImageType::RegionType region;
@@ -41,8 +40,7 @@ TestGaussianDerivativeImageFunction()
   region.SetIndex(start);
   region.SetSize(size);
 
-  image->SetRegions(region);
-  image->AllocateInitialized();
+  auto image = ImageType::CreateInitialized(region);
 
   // Fill the image with a straight line
   for (unsigned int i = 0; i < 50; ++i)

Modules/Core/ImageFunction/test/itkSumOfSquaresImageFunctionGTest.cxx

@@ -56,9 +56,7 @@ template <typename TImage>
 void
 Expect_EvaluateAtIndex_returns_zero_when_all_pixels_are_zero(const typename TImage::SizeType & imageSize)
 {
-  const auto image = TImage::New();
-  image->SetRegions(imageSize);
-  image->AllocateInitialized();
+  const auto image = TImage::CreateInitialized(imageSize);
 
   const auto imageFunction = itk::SumOfSquaresImageFunction<TImage>::New();
 

Modules/Core/SpatialObjects/test/itkImageMaskSpatialObjectGTest.cxx

@@ -49,10 +49,7 @@ void
 Expect_AxisAlignedBoundingBoxRegion_is_empty_when_all_pixel_values_are_zero(
   const itk::ImageRegion<VImageDimension> & imageRegion)
 {
-  const auto image = itk::Image<TPixel, VImageDimension>::New();
-
-  image->SetRegions(imageRegion);
-  image->AllocateInitialized();
+  const auto image = itk::Image<TPixel, VImageDimension>::CreateInitialized(imageRegion);
 
   EXPECT_EQ(ComputeAxisAlignedBoundingBoxRegionInImageGridSpace(*image).GetSize(), itk::Size<VImageDimension>{});
 }
@@ -84,10 +81,7 @@ void
 Expect_AxisAlignedBoundingBoxRegion_equals_region_of_single_pixel_when_it_is_the_only_non_zero_pixel(
   const itk::ImageRegion<VImageDimension> & imageRegion)
 {
-  const auto image = itk::Image<TPixel, VImageDimension>::New();
-
-  image->SetRegions(imageRegion);
-  image->AllocateInitialized();
+  const auto image = itk::Image<TPixel, VImageDimension>::CreateInitialized(imageRegion);
 
   const itk::ImageRegionIndexRange<VImageDimension> indexRange{ imageRegion };
 
@@ -246,9 +240,7 @@ TEST(ImageMaskSpatialObject, IsInsideSingleNonZeroPixel)
   using PointType = ImageType::PointType;
 
   // Create an image filled with zero valued pixels.
-  const auto image = ImageType::New();
-  image->SetRegions(SizeType::Filled(8));
-  image->AllocateInitialized();
+  const auto image = ImageType::CreateInitialized(SizeType::Filled(8));
 
   constexpr itk::IndexValueType indexValue{ 4 };
   image->SetPixel({ { indexValue, indexValue } }, 1);
@@ -273,9 +265,7 @@ TEST(ImageMaskSpatialObject, IsInsideIndependentOfDistantPixels)
   using PointType = ImageType::PointType;
 
   // Create an image filled with zero valued pixels.
-  const auto image = ImageType::New();
-  image->SetRegions(SizeType::Filled(10));
-  image->AllocateInitialized();
+  const auto image = ImageType::CreateInitialized(SizeType::Filled(10));
 
   // Set the value of a pixel to non-zero.
   constexpr itk::IndexValueType indexValue{ 8 };
@@ -312,9 +302,7 @@ TEST(ImageMaskSpatialObject, IsInsideIndependentOfDistantPixels)
 TEST(ImageMaskSpatialObject, CornerPointIsNotInsideMaskOfZeroValues)
 {
   // Create a mask image, and fill the image with zero vales.
-  const auto image = itk::Image<unsigned char>::New();
-  image->SetRegions(itk::Size<>{ { 2, 2 } });
-  image->AllocateInitialized();
+  const auto image = itk::Image<unsigned char>::CreateInitialized(itk::Size<>{ { 2, 2 } });
 
   const auto imageMaskSpatialObject = itk::ImageMaskSpatialObject<2>::New();
   imageMaskSpatialObject->SetImage(image);
@@ -332,9 +320,7 @@ TEST(ImageMaskSpatialObject, IsInsideInWorldSpaceOverloads)
   using PointType = MaskImageType::PointType;
 
   // Create a mask image.
-  const auto maskImage = MaskImageType::New();
-  maskImage->SetRegions(itk::Size<imageDimension>::Filled(2));
-  maskImage->AllocateInitialized();
+  const auto maskImage = MaskImageType::CreateInitialized(itk::Size<imageDimension>::Filled(2));
   maskImage->SetPixel({}, MaskPixelType{ 1 });
   maskImage->SetSpacing(itk::MakeFilled<MaskImageType::SpacingType>(0.5));
 
@@ -368,9 +354,8 @@ TEST(ImageMaskSpatialObject, StoresRegionsFromMaskImage)
       using SizeType = MaskImageType::SizeType;
 
       // Create a mask image.
-      const auto maskImage = MaskImageType::New();
-      maskImage->SetRegions(RegionType{ IndexType::Filled(indexValue), SizeType::Filled(sizeValue) });
-      maskImage->AllocateInitialized();
+      const auto maskImage =
+        MaskImageType::CreateInitialized({ IndexType::Filled(indexValue), SizeType::Filled(sizeValue) });
 
       const auto imageMaskSpatialObject = ImageMaskSpatialObjectType::New();
       imageMaskSpatialObject->SetImage(maskImage);

Modules/Core/SpatialObjects/test/itkImageMaskSpatialObjectTest.cxx

@@ -41,16 +41,14 @@ itkImageMaskSpatialObjectTest(int, char *[])
   using ImageType = ImageMaskSpatialObject::ImageType;
   using Iterator = itk::ImageRegionIterator<ImageType>;
 
-  auto                  image = ImageType::New();
   ImageType::SizeType   size = { { 50, 50, 50 } };
   ImageType::IndexType  index = { { 0, 0, 0 } };
   ImageType::RegionType region;
 
   region.SetSize(size);
   region.SetIndex(index);
 
-  image->SetRegions(region);
-  image->AllocateInitialized();
+  auto image = ImageType::CreateInitialized(region);
 
   ImageType::RegionType insideRegion;
   ImageType::SizeType   insideSize = { { 30, 30, 30 } };

Modules/Core/SpatialObjects/test/itkImageMaskSpatialObjectTest2.cxx

@@ -51,7 +51,15 @@ itkImageMaskSpatialObjectTest2(int, char *[])
   // Also explicitly uses nonzero origin, non identity scales
   // to fully test the commonly encountered cases from the real world
 
-  auto image = ImageType::New();
+  const ImageType::SizeType size = { { 50, 50, 50 } };
+
+  constexpr unsigned int     index_offset = 6543;
+  const ImageType::IndexType index = { { index_offset, index_offset, index_offset } };
+
+  ImageType::RegionType region;
+  region.SetSize(size);
+  region.SetIndex(index);
+  auto image = ImageType::CreateInitialized(region);
 
   // Set the direction for a non-oriented image
   // to better test the frequently encountered case
@@ -61,8 +69,7 @@ itkImageMaskSpatialObjectTest2(int, char *[])
   const ImageType::DirectionType direction = tfm->GetMatrix();
   image->SetDirection(direction);
 
-  const ImageType::SizeType size = { { 50, 50, 50 } };
-  ImageType::PointType      origin;
+  ImageType::PointType origin;
   origin[0] = 1.51;
   origin[1] = 2.10;
   origin[2] = -300;
@@ -73,14 +80,6 @@ itkImageMaskSpatialObjectTest2(int, char *[])
   spacing[1] = 0.7;
   spacing[2] = 1.1;
   image->SetSpacing(spacing);
-  constexpr unsigned int     index_offset = 6543;
-  const ImageType::IndexType index = { { index_offset, index_offset, index_offset } };
-
-  ImageType::RegionType region;
-  region.SetSize(size);
-  region.SetIndex(index);
-  image->SetRegions(region);
-  image->AllocateInitialized();
 
   ImageType::RegionType  insideRegion;
   constexpr unsigned int INSIDE_SIZE = 30;