rtkNesterovUpdateImageFilter.h

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/*=========================================================================
 *
 *  Copyright RTK 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
 *
 *         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 rtkNesterovUpdateImageFilter_h
#define rtkNesterovUpdateImageFilter_h

#include "itkInPlaceImageFilter.h"

namespace rtk
{

template <typename TImage>
class ITK_TEMPLATE_EXPORT NesterovUpdateImageFilter : public itk::InPlaceImageFilter<TImage, TImage>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(NesterovUpdateImageFilter);

  using Self = NesterovUpdateImageFilter;
  using Superclass = itk::InPlaceImageFilter<TImage, TImage>;
  using Pointer = itk::SmartPointer<Self>;

  using OutputImageRegionType = typename Superclass::OutputImageType::RegionType;

  itkNewMacro(Self);

  itkOverrideGetNameOfClassMacro(NesterovUpdateImageFilter);

  itkGetMacro(NumberOfIterations, int);
  itkSetMacro(NumberOfIterations, int);

protected:
  NesterovUpdateImageFilter();
  ~NesterovUpdateImageFilter() override;

  void
  BeforeThreadedGenerateData() override;
  void
  DynamicThreadedGenerateData(const OutputImageRegionType & outputRegionForThread) override;
  void
  AfterThreadedGenerateData() override;

  void
  GenerateInputRequestedRegion() override;

  int                                   m_NumberOfIterations;
  int                                   m_CurrentIteration;
  bool                                  m_MustInitializeIntermediateImages;
  typename TImage::PixelType::ValueType m_TCoeff;
  typename TImage::PixelType::ValueType m_TCoeffNext;
  typename TImage::PixelType::ValueType m_Sum;
  typename TImage::PixelType::ValueType m_Ratio;

  // Internal images
  typename TImage::Pointer m_Vk;
  typename TImage::Pointer m_Alphak;
};
} // namespace rtk


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

#endif