itkGaussianRandomSpatialNeighborSubsampler.h

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/*=========================================================================
 *
 *  Copyright Insight Software 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
 *
 *         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 itkGaussianRandomSpatialNeighborSubsampler_h
#define itkGaussianRandomSpatialNeighborSubsampler_h

#include "itkUniformRandomSpatialNeighborSubsampler.h"

namespace itk {
namespace Statistics {
template < typename TSample, typename TRegion >
  class ITK_TEMPLATE_EXPORT GaussianRandomSpatialNeighborSubsampler : public UniformRandomSpatialNeighborSubsampler<TSample, TRegion>
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(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>;

  itkTypeMacro(GaussianRandomSpatialNeighborSubsampler,
               UniformRandomSpatialNeighborSubsampler);

  itkNewMacro(Self);

  using SampleType = typename Superclass::SampleType;
  using SampleConstPointer = typename Superclass::SampleConstPointer;
  using MeasurementVectorType = typename Superclass::MeasurementVectorType;
  using InstanceIdentifier = typename Superclass::InstanceIdentifier;

  using SubsampleType = typename Superclass::SubsampleType;
  using SubsamplePointer = typename Superclass::SubsamplePointer;
  using SubsampleConstIterator = typename Superclass::SubsampleConstIterator;
  using InstanceIdentifierHolder = typename Superclass::InstanceIdentifierHolder;

  using SearchSizeType = typename Superclass::SearchSizeType;
  using RandomIntType = typename Superclass::RandomIntType;
  using RadiusType = typename Superclass::RadiusType;
  using RegionType = typename Superclass::RegionType;
  using IndexType = typename Superclass::IndexType;
  using SizeType = typename Superclass::SizeType;
  using ImageHelperType = typename Superclass::ImageHelperType;

  using RealType = double;

  using RandomGeneratorType = typename Superclass::RandomGeneratorType;
  static constexpr int DefaultVariance = 900;

  itkSetMacro(Variance, RealType);

  itkGetConstMacro(Variance, RealType);

protected:
  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

} // end of namespace Statistics
} // end of namespace itk

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

#endif