itkDisplacementFieldJacobianDeterminantFilter.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 itkDisplacementFieldJacobianDeterminantFilter_h
#define itkDisplacementFieldJacobianDeterminantFilter_h

#include "itkNeighborhoodIterator.h"
#include "itkImageToImageFilter.h"
#include "itkVector.h"
#include "vnl/vnl_matrix.h"
#include "vnl/vnl_det.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_ASSIGN(DisplacementFieldJacobianDeterminantFilter);

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

  itkNewMacro(Self);

  itkTypeMacro(DisplacementFieldJacobianDeterminantFilter, ImageToImageFilter);

  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 OutputImageRegionType = typename Superclass::OutputImageRegionType;

  void GenerateInputRequestedRegion() override;

  void SetUseImageSpacingOn()
  { this->SetUseImageSpacing(true); }

  void SetUseImageSpacingOff()
  { this->SetUseImageSpacing(false); }

  void SetUseImageSpacing(bool);

  itkGetConstMacro(UseImageSpacing, bool);

  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:
  bool m_UseImageSpacing;

  ThreadIdType m_RequestedNumberOfThreads;

  typename ImageBaseType::ConstPointer m_RealValuedInputImage;

  RadiusType m_NeighborhoodRadius;
};
} // end namespace itk

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

#endif