itkManifoldParzenWindowsPointSetFunction.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
 *
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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.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef itkManifoldParzenWindowsPointSetFunction_h
#define itkManifoldParzenWindowsPointSetFunction_h

#include "itkPointSetFunction.h"

#include "itkGaussianMembershipFunction.h"
#include "itkMatrix.h"
#include "itkPointSet.h"
#include "itkPointsLocator.h"
#include "itkVector.h"
#include "itkMultiThreaderBase.h"

#include <vector>

namespace itk
{

template <typename TPointSet, typename TOutput = double, typename TCoordRep = double>
class ITK_TEMPLATE_EXPORT ManifoldParzenWindowsPointSetFunction
: public PointSetFunction<TPointSet, TOutput, TCoordRep>
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(ManifoldParzenWindowsPointSetFunction);

  using Self = ManifoldParzenWindowsPointSetFunction;
  using Superclass = PointSetFunction<TPointSet, TOutput, TCoordRep>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;

  itkNewMacro(Self);

  static constexpr unsigned int PointDimension = TPointSet::PointDimension;

  using InputPointSetType = typename Superclass::InputPointSetType;
  using InputPointType = typename Superclass::InputPointType;

  using PointSetType = TPointSet;
  using PointType = typename PointSetType::PointType;
  using PointsContainer = typename PointSetType::PointsContainer;
  using PointIdentifier = typename PointsContainer::ElementIdentifier;

  using RealType = TOutput;
  using OutputType = TOutput;
  using CoordRepType = TCoordRep;

  using PointsLocatorType = PointsLocator< PointsContainer>;
  using NeighborsIdentifierType = typename PointsLocatorType::NeighborsIdentifierType;

  using GaussianType = typename Statistics::GaussianMembershipFunction<PointType>;
  using GaussianPointer = typename GaussianType::Pointer;
  using GaussianConstPointer = typename GaussianType::ConstPointer;
  using GaussianContainerType = std::vector<GaussianPointer>;
  using CovarianceMatrixType = typename GaussianType::CovarianceMatrixType;

  itkSetMacro( CovarianceKNeighborhood, unsigned int );

  itkGetConstMacro( CovarianceKNeighborhood, unsigned int );

  itkSetMacro( EvaluationKNeighborhood, unsigned int );

  itkGetConstMacro( EvaluationKNeighborhood, unsigned int );

  itkSetMacro( RegularizationSigma, RealType );

  itkGetConstMacro( RegularizationSigma, RealType );

  itkSetMacro( KernelSigma, RealType );

  itkGetConstMacro( KernelSigma, RealType );

  itkSetMacro( Normalize, bool );

  itkGetConstMacro( Normalize, bool );

  itkBooleanMacro( Normalize );

  itkSetMacro( UseAnisotropicCovariances, bool );

  itkGetConstMacro( UseAnisotropicCovariances, bool );

  itkBooleanMacro( UseAnisotropicCovariances );

  void SetInputPointSet( const InputPointSetType * ) override;

  TOutput Evaluate( const InputPointType & ) const override;

  GaussianConstPointer GetGaussian( PointIdentifier ) const;

  itkGetModifiableObjectMacro(PointsLocator, PointsLocatorType );

protected:
  ManifoldParzenWindowsPointSetFunction();
  ~ManifoldParzenWindowsPointSetFunction() override = default;
  void PrintSelf( std::ostream& os, Indent indent ) const override;

  void GenerateData();

private:
  typename PointsLocatorType::Pointer           m_PointsLocator;

  unsigned int                                  m_CovarianceKNeighborhood{ 5 };
  unsigned int                                  m_EvaluationKNeighborhood{ 50 };
  RealType                                      m_RegularizationSigma;
  RealType                                      m_KernelSigma;

  GaussianContainerType                         m_Gaussians;
  bool                                          m_Normalize{ true };
  bool                                          m_UseAnisotropicCovariances{ true };

  MultiThreaderBase::Pointer                    m_MultiThreader;
};

} // end namespace itk

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

#endif