itkPCAShapeSignedDistanceFunction.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 itkPCAShapeSignedDistanceFunction_h
#define itkPCAShapeSignedDistanceFunction_h

#include "itkShapeSignedDistanceFunction.h"
#include "itkImage.h"
#include "itkInterpolateImageFunction.h"
#include "itkExtrapolateImageFunction.h"
#include "itkTransform.h"

namespace itk
{
template< typename TCoordRep,
          unsigned int VSpaceDimension,
          typename TImage = Image< double, VSpaceDimension > >
class ITK_TEMPLATE_EXPORT PCAShapeSignedDistanceFunction:
  public ShapeSignedDistanceFunction< TCoordRep, VSpaceDimension >
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(PCAShapeSignedDistanceFunction);

  using Self = PCAShapeSignedDistanceFunction;
  using Superclass = ShapeSignedDistanceFunction<
    TCoordRep, VSpaceDimension >;

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

  itkTypeMacro(PCAShapeSignedDistanceFunction, ShapeSignedDistancFunction);

  itkNewMacro(Self);

  static constexpr unsigned int SpaceDimension = Superclass::SpaceDimension;

  using CoordRepType = typename Superclass::CoordRepType;

  using InputType = typename Superclass::InputType;

  using OutputType = typename Superclass::OutputType;

  using PointType = typename Superclass::PointType;

  using ParametersType = typename Superclass::ParametersType;

  using ImageType = TImage;
  using ImagePointer = typename ImageType::Pointer;
  using ImagePointerVector = std::vector< ImagePointer >;

  using TransformType = Transform< CoordRepType,
                     Self::SpaceDimension,
                     Self::SpaceDimension >;

  using InterpolatorType = InterpolateImageFunction< ImageType, CoordRepType >;
  using InterpolatorPointer = typename InterpolatorType::Pointer;
  using InterpolatorPointerVector = std::vector< InterpolatorPointer >;

  using ExtrapolatorType = ExtrapolateImageFunction< ImageType, CoordRepType >;
  using ExtrapolatorPointer = typename ExtrapolatorType::Pointer;
  using ExtrapolatorPointerVector = std::vector< ExtrapolatorPointer >;

  using FunctionType = ImageFunction< ImageType, double, CoordRepType >;
  using FunctionPointer = typename FunctionType::Pointer;
  using FunctionPointerVector = std::vector< FunctionPointer >;

  void SetNumberOfPrincipalComponents(unsigned int n);

  itkGetConstMacro(NumberOfPrincipalComponents, unsigned int);

  itkSetObjectMacro(MeanImage, ImageType);
  itkGetModifiableObjectMacro(MeanImage, ImageType);

  void SetPrincipalComponentImages(ImagePointerVector v)
  { m_PrincipalComponentImages = v; }
//  ImagePointerVector & GetPrincipalComponentImages()
//    { return m_PrincipalComponentImages; }

  itkSetMacro(PrincipalComponentStandardDeviations, ParametersType);
  itkGetConstMacro(PrincipalComponentStandardDeviations, ParametersType);

  itkSetObjectMacro(Transform, TransformType);
  itkGetModifiableObjectMacro(Transform, TransformType);

  void SetParameters(const ParametersType &) override;

  unsigned int GetNumberOfShapeParameters() const override
  { return m_NumberOfPrincipalComponents; }
  unsigned int GetNumberOfPoseParameters() const override
  { return m_Transform ? m_Transform->GetNumberOfParameters() : 0; }

  OutputType Evaluate(const PointType & point) const override;

  void Initialize() override;

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

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

private:
  unsigned int m_NumberOfPrincipalComponents;
  unsigned int m_NumberOfTransformParameters;

  ImagePointer       m_MeanImage;
  ImagePointerVector m_PrincipalComponentImages;
  ParametersType     m_PrincipalComponentStandardDeviations;

  typename TransformType::Pointer m_Transform;

  InterpolatorPointerVector     m_Interpolators;
  ExtrapolatorPointerVector     m_Extrapolators;

  ParametersType m_WeightOfPrincipalComponents;
  ParametersType m_TransformParameters;
};
} // end namespace itk

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

#endif