itkVectorNearestNeighborInterpolateImageFunction.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 itkVectorNearestNeighborInterpolateImageFunction_h
#define itkVectorNearestNeighborInterpolateImageFunction_h
 
#include "itkVectorInterpolateImageFunction.h"
 
namespace itk
{
template <typename TInputImage, typename TCoordinate = double>
class ITK_TEMPLATE_EXPORT VectorNearestNeighborInterpolateImageFunction
  : public VectorInterpolateImageFunction<TInputImage, TCoordinate>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(VectorNearestNeighborInterpolateImageFunction);
 
  using Self = VectorNearestNeighborInterpolateImageFunction;
  using Superclass = VectorInterpolateImageFunction<TInputImage, TCoordinate>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;
 
  itkNewMacro(Self);
 
  itkOverrideGetNameOfClassMacro(VectorNearestNeighborInterpolateImageFunction);
 
  using typename Superclass::InputImageType;
  using typename Superclass::PixelType;
  using typename Superclass::ValueType;
  using typename Superclass::RealType;
 
  static constexpr unsigned int Dimension = Superclass::Dimension;
 
  static constexpr unsigned int ImageDimension = Superclass::ImageDimension;
 
  using typename Superclass::IndexType;
 
  using typename Superclass::ContinuousIndexType;
 
  using typename Superclass::OutputType;
 
  OutputType
  EvaluateAtContinuousIndex(const ContinuousIndexType & index) const override
  {
    IndexType nindex;
 
    this->ConvertContinuousIndexToNearestIndex(index, nindex);
    return static_cast<OutputType>(this->GetInputImage()->GetPixel(nindex));
  }
 
protected:
  VectorNearestNeighborInterpolateImageFunction() = default;
  ~VectorNearestNeighborInterpolateImageFunction() override = default;
};
} // end namespace itk
 
#endif