itkDanielssonDistanceMapImageFilter.h

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/*=========================================================================
 *
 *  Copyright NumFOCUS
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         https://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef itkDanielssonDistanceMapImageFilter_h
#define itkDanielssonDistanceMapImageFilter_h
 
#include "itkImageToImageFilter.h"
#include "itkImageRegionIteratorWithIndex.h"
 
namespace itk
{
template <typename TInputImage, typename TOutputImage, typename TVoronoiImage = TInputImage>
class ITK_TEMPLATE_EXPORT DanielssonDistanceMapImageFilter : public ImageToImageFilter<TInputImage, TOutputImage>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(DanielssonDistanceMapImageFilter);

  using Self = DanielssonDistanceMapImageFilter;
  using Superclass = ImageToImageFilter<TInputImage, TOutputImage>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;
 
  using DataObjectPointer = DataObject::Pointer;

  itkNewMacro(Self);

  itkOverrideGetNameOfClassMacro(DanielssonDistanceMapImageFilter);

  using InputImageType = TInputImage;

  using InputPixelType = typename InputImageType::PixelType;

  using RegionType = typename InputImageType::RegionType;

  using IndexType = typename RegionType::IndexType;

  using OffsetType = typename InputImageType::OffsetType;

  using SpacingType = typename InputImageType::SpacingType;
  using SpacingValueType = typename InputImageType::SpacingValueType;

  using SizeType = typename RegionType::SizeType;

  using SizeValueType = typename SizeType::SizeValueType;

  using OutputImageType = TOutputImage;

  using OutputPixelType = typename OutputImageType::PixelType;
 
  using VoronoiImageType = TVoronoiImage;
  using VoronoiImagePointer = typename VoronoiImageType::Pointer;
  using VoronoiPixelType = typename VoronoiImageType::PixelType;

  static constexpr unsigned int InputImageDimension = InputImageType::ImageDimension;

  using VectorImageType = Image<OffsetType, Self::InputImageDimension>;

  using InputImagePointer = typename InputImageType::ConstPointer;

  using OutputImagePointer = typename OutputImageType::Pointer;

  using VectorImagePointer = typename VectorImageType::Pointer;

  itkSetMacro(SquaredDistance, bool);
  itkGetConstReferenceMacro(SquaredDistance, bool);
  itkBooleanMacro(SquaredDistance);

  itkSetMacro(InputIsBinary, bool);
  itkGetConstReferenceMacro(InputIsBinary, bool);
  itkBooleanMacro(InputIsBinary);

  itkSetMacro(UseImageSpacing, bool);
  itkGetConstReferenceMacro(UseImageSpacing, bool);
  itkBooleanMacro(UseImageSpacing);

  VoronoiImageType *
  GetVoronoiMap();

  OutputImageType *
  GetDistanceMap();

  VectorImageType *
  GetVectorDistanceMap();

  using DataObjectPointerArraySizeType = ProcessObject::DataObjectPointerArraySizeType;
  using Superclass::MakeOutput;
  DataObjectPointer
  MakeOutput(DataObjectPointerArraySizeType idx) override;
 
  static constexpr unsigned int OutputImageDimension = TOutputImage::ImageDimension;
  static constexpr unsigned int VoronoiImageDimension = TVoronoiImage::ImageDimension;
 
  itkConceptMacro(InputOutputSameDimensionCheck, (Concept::SameDimension<InputImageDimension, OutputImageDimension>));
  itkConceptMacro(InputVoronoiSameDimensionCheck, (Concept::SameDimension<InputImageDimension, VoronoiImageDimension>));
  itkConceptMacro(DoubleConvertibleToOutputCheck, (Concept::Convertible<double, OutputPixelType>));
  itkConceptMacro(InputConvertibleToOutputCheck, (Concept::Convertible<InputPixelType, OutputPixelType>));
 
protected:
  DanielssonDistanceMapImageFilter();
  ~DanielssonDistanceMapImageFilter() override = default;
  void
  PrintSelf(std::ostream & os, Indent indent) const override;

  void
  GenerateData() override;

  void
  PrepareData();

  void
  ComputeVoronoiMap();

  void
  UpdateLocalDistance(VectorImageType *, const IndexType &, const OffsetType &);
 
private:
  bool m_SquaredDistance{};
  bool m_InputIsBinary{};
  bool m_UseImageSpacing{ true };
 
  SpacingType m_InputSpacingCache{};
};
} // end namespace itk
 
#ifndef ITK_MANUAL_INSTANTIATION
#  include "itkDanielssonDistanceMapImageFilter.hxx"
#endif
 
#endif