itkReducedDimensionBSplineInterpolateImageFunction.h

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 *  Copyright UMC Utrecht and contributors
 *
 *  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
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 *        http://www.apache.org/licenses/LICENSE-2.0.txt
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 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/*=========================================================================
 
  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkReducedDimBSplineInterpolateImageFunction.h,v $
  Date:      $Date: 2009-04-25 12:27:05 $
  Version:   $Revision: 1.24 $
 
  Copyright (c) Insight Software Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
 
  Portions of this code are covered under the VTK copyright.
  See VTKCopyright.txt or http://www.kitware.com/VTKCopyright.htm for details.
 
     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notices for more information.
 
=========================================================================*/
#ifndef itkReducedDimensionBSplineInterpolateImageFunction_h
#define itkReducedDimensionBSplineInterpolateImageFunction_h
 
#include <vector>
 
#include "itkInterpolateImageFunction.h"
#include <vnl/vnl_matrix.h>
 
#include "itkMultiOrderBSplineDecompositionImageFilter.h"
#include "itkConceptChecking.h"
#include "itkCovariantVector.h"
 
namespace itk
{
template <class TImageType, class TCoordRep = double, class TCoefficientType = double>
class ITK_TEMPLATE_EXPORT ReducedDimensionBSplineInterpolateImageFunction
  : public InterpolateImageFunction<TImageType, TCoordRep>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(ReducedDimensionBSplineInterpolateImageFunction);
 
  using Self = ReducedDimensionBSplineInterpolateImageFunction;
  using Superclass = InterpolateImageFunction<TImageType, TCoordRep>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;
 
  itkTypeMacro(ReducedDimensionBSplineInterpolateImageFunction, InterpolateImageFunction);
 
  itkNewMacro(Self);
 
  using typename Superclass::OutputType;
 
  using SizeType = typename TImageType::SizeType;
 
  using typename Superclass::InputImageType;
 
  itkStaticConstMacro(ImageDimension, unsigned int, Superclass::ImageDimension);
 
  using typename Superclass::IndexType;
 
  using typename Superclass::ContinuousIndexType;
 
  using typename Superclass::PointType;
 
  using CoefficientDataType = TCoefficientType;
  using CoefficientImageType = Image<CoefficientDataType, Self::ImageDimension>;
 
  using CoefficientFilter = MultiOrderBSplineDecompositionImageFilter<TImageType, CoefficientImageType>;
 
  using CoefficientFilterPointer = typename CoefficientFilter::Pointer;
 
  OutputType
  EvaluateAtContinuousIndex(const ContinuousIndexType & index) const override;
 
  using CovariantVectorType = CovariantVector<OutputType, Self::ImageDimension>;
 
  CovariantVectorType
  EvaluateDerivative(const PointType & point) const
  {
    const auto index = this->GetInputImage()->template TransformPhysicalPointToContinuousIndex<TCoordRep>(point);
    return (this->EvaluateDerivativeAtContinuousIndex(index));
  }
 
 
  CovariantVectorType
  EvaluateDerivativeAtContinuousIndex(const ContinuousIndexType & x) const;
 
  void
  SetSplineOrder(unsigned int SplineOrder);
 
  itkGetConstMacro(SplineOrder, int);
 
  void
  SetInputImage(const TImageType * inputData) override;
 
  itkSetMacro(UseImageDirection, bool);
  itkGetConstMacro(UseImageDirection, bool);
  itkBooleanMacro(UseImageDirection);
 
protected:
  ReducedDimensionBSplineInterpolateImageFunction();
  ~ReducedDimensionBSplineInterpolateImageFunction() override = default;
  void
  PrintSelf(std::ostream & os, Indent indent) const override;
 
  // These are needed by the smoothing spline routine.
  typename TImageType::SizeType m_DataLength;  // Image size
  unsigned int                  m_SplineOrder; // User specified spline order (3rd or cubic is the default)
 
  typename CoefficientImageType::ConstPointer m_Coefficients; // Spline coefficients
 
private:
  SizeType
  GetRadius() const override
  {
    return SizeType::Filled(m_SplineOrder + 1);
  }
 
  void
  SetInterpolationWeights(const ContinuousIndexType & x,
                          const vnl_matrix<long> &    EvaluateIndex,
                          vnl_matrix<double> &        weights,
                          unsigned int                splineOrder) const;
 
  void
  SetDerivativeWeights(const ContinuousIndexType & x,
                       const vnl_matrix<long> &    EvaluateIndex,
                       vnl_matrix<double> &        weights,
                       unsigned int                splineOrder) const;
 
  void
  GeneratePointsToIndex();
 
  void
  DetermineRegionOfSupport(vnl_matrix<long> &          evaluateIndex,
                           const ContinuousIndexType & x,
                           unsigned int                splineOrder) const;
 
  void
  ApplyMirrorBoundaryConditions(vnl_matrix<long> & evaluateIndex, unsigned int splineOrder) const;
 
  std::vector<IndexType> m_PointsToIndex; // Preallocation of interpolation neighborhood indicies
 
  CoefficientFilterPointer m_CoefficientFilter;
 
  // flag to take or not the image direction into account when computing the
  // derivatives.
  bool m_UseImageDirection;
};
 
} // namespace itk
 
#ifndef ITK_MANUAL_INSTANTIATION
#  include "itkReducedDimensionBSplineInterpolateImageFunction.hxx"
#endif
 
#endif