itkGaussianRandomSpatialNeighborSubsampler.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
 *
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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
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef itkGaussianRandomSpatialNeighborSubsampler_h
#define itkGaussianRandomSpatialNeighborSubsampler_h
 
#include "itkUniformRandomSpatialNeighborSubsampler.h"
 
namespace itk::Statistics
{
 
template <typename TSample, typename TRegion>
class ITK_TEMPLATE_EXPORT GaussianRandomSpatialNeighborSubsampler
  : public UniformRandomSpatialNeighborSubsampler<TSample, TRegion>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(GaussianRandomSpatialNeighborSubsampler);

  using Self = GaussianRandomSpatialNeighborSubsampler<TSample, TRegion>;
  using Superclass = UniformRandomSpatialNeighborSubsampler<TSample, TRegion>;
  using Baseclass = typename Superclass::Baseclass;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;

  itkOverrideGetNameOfClassMacro(GaussianRandomSpatialNeighborSubsampler);

  itkNewMacro(Self);

  using typename Superclass::SampleType;
  using typename Superclass::SampleConstPointer;
  using typename Superclass::MeasurementVectorType;
  using typename Superclass::InstanceIdentifier;
 
  using typename Superclass::SubsampleType;
  using typename Superclass::SubsamplePointer;
  using typename Superclass::SubsampleConstIterator;
  using typename Superclass::InstanceIdentifierHolder;
 
  using typename Superclass::SearchSizeType;
  using typename Superclass::RandomIntType;
  using typename Superclass::RadiusType;
  using typename Superclass::RegionType;
  using typename Superclass::IndexType;
  using typename Superclass::SizeType;
  using typename Superclass::ImageHelperType;
 
  using RealType = double;
 
  using typename Superclass::RandomGeneratorType;
  static constexpr int DefaultVariance = 900;

  itkSetMacro(Variance, RealType);

  itkGetConstMacro(Variance, RealType);
 
protected:
  [[nodiscard]] typename LightObject::Pointer
  InternalClone() const override;
 
  GaussianRandomSpatialNeighborSubsampler();
  ~GaussianRandomSpatialNeighborSubsampler() override = default;
 
  void
  PrintSelf(std::ostream & os, Indent indent) const override;

  RandomIntType
  GetIntegerVariate(RandomIntType lowerBound, RandomIntType upperBound, RandomIntType mean) override;
 
  RealType m_Variance{};
}; // end of class GaussianRandomSpatialNeighborSubsampler
 
} // namespace itk::Statistics
 
#ifndef ITK_MANUAL_INSTANTIATION
#  include "itkGaussianRandomSpatialNeighborSubsampler.hxx"
#endif
 
#endif