itkSumProjectionImageFilter.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.
 *
 *=========================================================================*/
#ifndef itkSumProjectionImageFilter_h
#define itkSumProjectionImageFilter_h
 
#include "itkProjectionImageFilter.h"
#include "itkConceptChecking.h"
 
namespace itk
{
 
namespace Functor
{
template <typename TInputPixel, typename TOutputPixel>
class SumAccumulator
{
public:
  SumAccumulator(SizeValueType) {}
  ~SumAccumulator() = default;
 
  inline void
  Initialize()
  {
    m_Sum = TOutputPixel{};
  }
 
  inline void
  operator()(const TInputPixel & input)
  {
    m_Sum = m_Sum + input;
  }
 
  inline TOutputPixel
  GetValue()
  {
    return m_Sum;
  }
 
  TOutputPixel m_Sum;
};
} // namespace Functor
 
template <typename TInputImage, typename TOutputImage>
class SumProjectionImageFilter
  : public ProjectionImageFilter<
      TInputImage,
      TOutputImage,
      Functor::SumAccumulator<typename TInputImage::PixelType, typename TOutputImage::PixelType>>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(SumProjectionImageFilter);
 
  using Self = SumProjectionImageFilter;
  using Superclass =
    ProjectionImageFilter<TInputImage,
                          TOutputImage,
                          Functor::SumAccumulator<typename TInputImage::PixelType, typename TOutputImage::PixelType>>;
 
  using InputImageType = TInputImage;
  using InputPixelType = typename InputImageType::PixelType;
 
  using OutputImageType = TOutputImage;
  using OutputPixelType = typename OutputImageType::PixelType;
 
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;

  itkOverrideGetNameOfClassMacro(SumProjectionImageFilter);

  itkNewMacro(Self);
 
  itkConceptMacro(InputPixelToOutputPixelTypeGreaterAdditiveOperatorCheck,
                  (Concept::AdditiveOperators<OutputPixelType, InputPixelType, OutputPixelType>));
  itkConceptMacro(InputHasNumericTraitsCheck, (Concept::HasNumericTraits<InputPixelType>));
 
protected:
  SumProjectionImageFilter() = default;
  ~SumProjectionImageFilter() override = default;
}; // end SumProjectionImageFilter
} // end namespace itk
 
#endif