itkSignedMaurerDistanceMapImageFilter.h

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/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  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
 *
 *         http://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 itkSignedMaurerDistanceMapImageFilter_h
#define itkSignedMaurerDistanceMapImageFilter_h

#include "itkImageToImageFilter.h"

namespace itk
{
template< typename TInputImage, typename TOutputImage >
class ITK_TEMPLATE_EXPORT SignedMaurerDistanceMapImageFilter:
  public ImageToImageFilter< TInputImage, TOutputImage >
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(SignedMaurerDistanceMapImageFilter);

  static constexpr unsigned int InputImageDimension = TInputImage::ImageDimension;
  static constexpr unsigned int OutputImageDimension = TOutputImage::ImageDimension;
  static constexpr unsigned int ImageDimension = TOutputImage::ImageDimension;

  using InputImageType = TInputImage;
  using InputImageConstPointer = typename InputImageType::ConstPointer;

  using OutputImageType = TOutputImage;
  using OutputImagePointer = typename OutputImageType::Pointer;

  using Self = SignedMaurerDistanceMapImageFilter;
  using Superclass = ImageToImageFilter<
    InputImageType,
    OutputImageType >;

  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;

  itkNewMacro(Self);

  itkTypeMacro(SignedMaurerDistanceMapImageFilter,
               ImageToImageFilter);

  using InputRegionType = typename InputImageType::RegionType;
  using OutputRegionType = typename OutputImageType::RegionType;

  using InputPixelType = typename InputImageType::PixelType;
  using OutputPixelType = typename OutputImageType::PixelType;

  using InputSizeType = typename InputImageType::SizeType;
  using InputSizeValueType = typename InputImageType::SizeValueType;
  using OutputSizeType = typename OutputImageType::SizeType;
  using OutputSizeValueType = typename OutputImageType::SizeValueType;

  using InputIndexType = typename InputImageType::IndexType;
  using InputIndexValueType = typename InputImageType::IndexValueType;
  using OutputIndexType = typename OutputImageType::IndexType;
  using OutputIndexValueType = typename OutputImageType::IndexValueType;

  using InputSpacingType = typename InputImageType::SpacingType;
  using OutputSpacingType = typename OutputImageType::SpacingType;
  using OutputImageRegionType = typename OutputImageType::RegionType;

  itkSetMacro(SquaredDistance, bool);

  itkGetConstReferenceMacro(SquaredDistance, bool);

  itkBooleanMacro(SquaredDistance);

  itkSetMacro(InsideIsPositive, bool);

  itkGetConstReferenceMacro(InsideIsPositive, bool);

  itkBooleanMacro(InsideIsPositive);

  itkSetMacro(UseImageSpacing, bool);

  itkGetConstReferenceMacro(UseImageSpacing, bool);

  itkBooleanMacro(UseImageSpacing);

  itkSetMacro(BackgroundValue, InputPixelType);
  itkGetConstReferenceMacro(BackgroundValue, InputPixelType);

protected:
  SignedMaurerDistanceMapImageFilter();
  ~SignedMaurerDistanceMapImageFilter() override = default;

  void PrintSelf(std::ostream & os, Indent indent) const override;

  void GenerateData() override;

  unsigned int SplitRequestedRegion(unsigned int i, unsigned int num,
    OutputImageRegionType & splitRegion) override;

  void ThreadedGenerateData(const OutputImageRegionType &, ThreadIdType ) override;

  void DynamicThreadedGenerateData( const OutputImageRegionType & ) override
  {
    itkExceptionMacro("This class requires threadId so it must use classic multi-threading model");
  }

private:
  void Voronoi(unsigned int, OutputIndexType idx, OutputImageType *output );
  bool Remove(OutputPixelType, OutputPixelType, OutputPixelType,
              OutputPixelType, OutputPixelType, OutputPixelType);

  InputPixelType   m_BackgroundValue;
  InputSpacingType m_Spacing;

  unsigned int m_CurrentDimension{0};

  bool m_InsideIsPositive{false};
  bool m_UseImageSpacing{true};
  bool m_SquaredDistance{false};

  const InputImageType *m_InputCache;
};
} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkSignedMaurerDistanceMapImageFilter.hxx"
#endif

#endif