rtkGetNewtonUpdateImageFilter.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 rtkGetNewtonUpdateImageFilter_h
#define rtkGetNewtonUpdateImageFilter_h

#include "itkImageToImageFilter.h"
#include "rtkMacro.h"

namespace rtk
{
template <class TGradient,
          class THessian = itk::Image<itk::Vector<typename TGradient::PixelType::ValueType,
                                                  TGradient::PixelType::Dimension * TGradient::PixelType::Dimension>,
                                      TGradient::ImageDimension>>
class ITK_TEMPLATE_EXPORT GetNewtonUpdateImageFilter : public itk::ImageToImageFilter<TGradient, TGradient>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(GetNewtonUpdateImageFilter);

  using Self = GetNewtonUpdateImageFilter;
  using Superclass = itk::ImageToImageFilter<TGradient, TGradient>;
  using Pointer = itk::SmartPointer<Self>;

  itkNewMacro(Self);

#ifdef itkOverrideGetNameOfClassMacro
  itkOverrideGetNameOfClassMacro(GetNewtonUpdateImageFilter);
#else
  itkTypeMacro(GetNewtonUpdateImageFilter, itk::ImageToImageFilter);
#endif


  static constexpr unsigned int nChannels = TGradient::PixelType::Dimension;

  using dataType = typename TGradient::PixelType::ValueType;

  void
  SetInputGradient(const TGradient * gradient);
  void
  SetInputHessian(const THessian * hessian);

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

  void
  GenerateInputRequestedRegion() override;

  void
  DynamicThreadedGenerateData(const typename TGradient::RegionType & outputRegionForThread) override;

  typename TGradient::ConstPointer
  GetInputGradient();
  typename THessian::ConstPointer
  GetInputHessian();
};
} // namespace rtk


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

#endif