itkLabelImageGenericInterpolateImageFunction.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.
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 *=========================================================================*/
#ifndef itkLabelImageGenericInterpolateImageFunction_h
#define itkLabelImageGenericInterpolateImageFunction_h
 
#include <itkInterpolateImageFunction.h>
#include "itkLabelSelectionImageAdaptor.h"
#include <vector>
#include <set>
 
namespace itk
{

 
template <typename TInputImage,
          template <typename TInterpInputImage, typename TCoordRep> class TInterpolator,
          typename TCoordRep = double>
class ITK_EXPORT LabelImageGenericInterpolateImageFunction : public InterpolateImageFunction<TInputImage, TCoordRep>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(LabelImageGenericInterpolateImageFunction);

  using Self = LabelImageGenericInterpolateImageFunction;
  using Superclass = InterpolateImageFunction<TInputImage, TCoordRep>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;
  using InputPixelType = typename TInputImage::PixelType;

  itkOverrideGetNameOfClassMacro(LabelImageGenericInterpolateImageFunction);

  itkNewMacro(Self);

  static constexpr unsigned int ImageDimension = TInputImage::ImageDimension;

  using OutputType = typename Superclass::OutputType;

  using InputImageType = typename Superclass::InputImageType;

  using RealType = typename Superclass::RealType;

  using IndexType = typename Superclass::IndexType;

  using SizeType = typename Superclass::SizeType;

  using ContinuousIndexType = typename Superclass::ContinuousIndexType;
 
  using LabelSelectionAdaptorType = LabelSelectionImageAdaptor<TInputImage, double>;
 
  // The interpolator used for individual binary masks corresponding to each label
  using InternalInterpolatorType = TInterpolator<LabelSelectionAdaptorType, TCoordRep>;

  OutputType
  EvaluateAtContinuousIndex(const ContinuousIndexType & cindex) const override
  {
    return this->EvaluateAtContinuousIndex(cindex, nullptr);
  }
 
  void
  SetInputImage(const TInputImage * image) override;

  SizeType
  GetRadius() const override
  {
    return SizeType::Filled(1);
  }
 
protected:
  LabelImageGenericInterpolateImageFunction() = default;
  ~LabelImageGenericInterpolateImageFunction() override = default;
 
  std::vector<typename InternalInterpolatorType::Pointer>  m_InternalInterpolators;
  std::vector<typename LabelSelectionAdaptorType::Pointer> m_LabelSelectionAdaptors;
  using LabelSetType = std::set<typename TInputImage::PixelType>;
  LabelSetType m_Labels;
 
private:
  virtual OutputType
  EvaluateAtContinuousIndex(const ContinuousIndexType &, OutputType *) const;
};
 
} // end namespace itk
 
#ifndef ITK_MANUAL_INSTANTIATION
#  include "itkLabelImageGenericInterpolateImageFunction.hxx"
#endif
 
#endif