itkGPUGradientNDAnisotropicDiffusionFunction.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
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
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 *  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
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#ifndef itkGPUGradientNDAnisotropicDiffusionFunction_h
#define itkGPUGradientNDAnisotropicDiffusionFunction_h
 
#include "itkGPUScalarAnisotropicDiffusionFunction.h"
#include "itkNeighborhoodAlgorithm.h"
#include "itkNeighborhoodInnerProduct.h"
#include "itkDerivativeOperator.h"
 
namespace itk
{
itkGPUKernelClassMacro(GPUGradientNDAnisotropicDiffusionFunctionKernel);
 
template <typename TImage>
class ITK_TEMPLATE_EXPORT GPUGradientNDAnisotropicDiffusionFunction
  : public GPUScalarAnisotropicDiffusionFunction<TImage>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(GPUGradientNDAnisotropicDiffusionFunction);
 
  using Self = GPUGradientNDAnisotropicDiffusionFunction;
  using Superclass = GPUScalarAnisotropicDiffusionFunction<TImage>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;
 
  itkNewMacro(Self);
 
  itkTypeMacro(GPUGradientNDAnisotropicDiffusionFunction, GPUScalarAnisotropicDiffusionFunction);
 
  using ImageType = typename Superclass::ImageType;
  using PixelType = typename Superclass::PixelType;
  using PixelRealType = typename Superclass::PixelRealType;
  using TimeStepType = typename Superclass::TimeStepType;
  using RadiusType = typename Superclass::RadiusType;
  using NeighborhoodType = typename Superclass::NeighborhoodType;
  using FloatOffsetType = typename Superclass::FloatOffsetType;
 
  using NeighborhoodSizeValueType = SizeValueType;
 
  static constexpr unsigned int ImageDimension = Superclass::ImageDimension;
 
  itkGetOpenCLSourceFromKernelMacro(GPUGradientNDAnisotropicDiffusionFunctionKernel);
 
  void
  GPUComputeUpdate(const typename TImage::Pointer output, typename TImage::Pointer buffer, void * globalData) override;
 
  void
  InitializeIteration() override
  {
    m_K = static_cast<PixelType>(this->GetAverageGradientMagnitudeSquared() * this->GetConductanceParameter() *
                                 this->GetConductanceParameter() * -2.0f);
  }
 
protected:
  GPUGradientNDAnisotropicDiffusionFunction();
  ~GPUGradientNDAnisotropicDiffusionFunction() override = default;
 
  NeighborhoodInnerProduct<ImageType> m_InnerProduct;
 
  std::slice x_slice[ImageDimension];
  std::slice xa_slice[ImageDimension][ImageDimension];
  std::slice xd_slice[ImageDimension][ImageDimension];
 
  DerivativeOperator<PixelType, Self::ImageDimension> m_DerivativeOperator;
 
  PixelType m_K;
 
  NeighborhoodSizeValueType m_Center;
  NeighborhoodSizeValueType m_Stride[ImageDimension];
 
  static double m_MIN_NORM;
};
} // end namespace itk
 
#ifndef ITK_MANUAL_INSTANTIATION
#  include "itkGPUGradientNDAnisotropicDiffusionFunction.hxx"
#endif
 
#endif