itkDisplacementFieldJacobianDeterminantFilter.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 itkDisplacementFieldJacobianDeterminantFilter_h
#define itkDisplacementFieldJacobianDeterminantFilter_h
 
#include "itkNeighborhoodIterator.h"
#include "itkImageToImageFilter.h"
#include "itkVector.h"
#include "vnl/vnl_matrix_fixed.h"
#include "vnl/vnl_vector_fixed.h"
 
namespace itk
{
template <typename TInputImage,
          typename TRealType = float,
          typename TOutputImage = Image<TRealType, TInputImage::ImageDimension>>
class ITK_TEMPLATE_EXPORT DisplacementFieldJacobianDeterminantFilter
  : public ImageToImageFilter<TInputImage, TOutputImage>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(DisplacementFieldJacobianDeterminantFilter);

  using Self = DisplacementFieldJacobianDeterminantFilter;
  using Superclass = ImageToImageFilter<TInputImage, TOutputImage>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;

  itkNewMacro(Self);

  itkOverrideGetNameOfClassMacro(DisplacementFieldJacobianDeterminantFilter);

  using OutputPixelType = typename TOutputImage::PixelType;
  using InputPixelType = typename TInputImage::PixelType;

  using InputImageType = TInputImage;
  using OutputImageType = TOutputImage;
  using InputImagePointer = typename InputImageType::Pointer;
  using OutputImagePointer = typename OutputImageType::Pointer;

  static constexpr unsigned int ImageDimension = TOutputImage::ImageDimension;

  static constexpr unsigned int VectorDimension = InputPixelType::Dimension;

  using RealType = TRealType;
  using RealVectorType = Vector<TRealType, InputPixelType::Dimension>;
  using RealVectorImageType = Image<RealVectorType, TInputImage::ImageDimension>;

  using ConstNeighborhoodIteratorType = ConstNeighborhoodIterator<RealVectorImageType>;
  using RadiusType = typename ConstNeighborhoodIteratorType::RadiusType;

  using typename Superclass::OutputImageRegionType;

  void
  GenerateInputRequestedRegion() override;

  void
  SetUseImageSpacing(bool);
  itkGetConstMacro(UseImageSpacing, bool);
  itkBooleanMacro(UseImageSpacing);
#if !defined(ITK_FUTURE_LEGACY_REMOVE)
  void
  SetUseImageSpacingOn()
  {
    this->SetUseImageSpacing(true);
  }

  void
  SetUseImageSpacingOff()
  {
    this->SetUseImageSpacing(false);
  }
#endif
 
  using WeightsType = FixedArray<TRealType, ImageDimension>;

  void
  SetDerivativeWeights(const WeightsType &);
  itkGetConstReferenceMacro(DerivativeWeights, WeightsType);
protected:
  DisplacementFieldJacobianDeterminantFilter();
  ~DisplacementFieldJacobianDeterminantFilter() override = default;

  void
  BeforeThreadedGenerateData() override;

  void
  DynamicThreadedGenerateData(const OutputImageRegionType & outputRegionForThread) override;
 
 
  void
  PrintSelf(std::ostream & os, Indent indent) const override;
 
  using ImageBaseType = typename InputImageType::Superclass;

  itkGetConstObjectMacro(RealValuedInputImage, ImageBaseType);

  itkGetConstReferenceMacro(NeighborhoodRadius, RadiusType);
  itkSetMacro(NeighborhoodRadius, RadiusType);
  virtual TRealType
  EvaluateAtNeighborhood(const ConstNeighborhoodIteratorType & it) const;

  WeightsType m_DerivativeWeights{};

  WeightsType m_HalfDerivativeWeights{};
 
private:
  using InternalMatrixType = vnl_matrix_fixed<TRealType, ImageDimension, ImageDimension>;
 
  bool m_UseImageSpacing{ true };
 
  ThreadIdType m_RequestedNumberOfWorkUnits{};
 
  typename ImageBaseType::ConstPointer m_RealValuedInputImage{};
 
  RadiusType m_NeighborhoodRadius{};
 
  InternalMatrixType m_InputDirection{};
};
} // end namespace itk
 
#ifndef ITK_MANUAL_INSTANTIATION
#  include "itkDisplacementFieldJacobianDeterminantFilter.hxx"
#endif
 
#endif