itkUniformRandomSpatialNeighborSubsampler.h

Go to the documentation of this file.

/*=========================================================================
 *
 *  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
 *
 *  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 itkUniformRandomSpatialNeighborSubsampler_h
#define itkUniformRandomSpatialNeighborSubsampler_h

#include "itkSpatialNeighborSubsampler.h"
#include "itkMersenneTwisterRandomVariateGenerator.h"

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

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

  itkTypeMacro(UniformRandomSpatialNeighborSubsampler, SpatialNeighborSubsampler);

  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 SeedType = typename Baseclass::SeedType;

  using SearchSizeType = unsigned long;
  using RandomIntType = unsigned int;

  using RadiusType = typename Superclass::RadiusType;
  using RegionType = typename Superclass::RegionType;
  using IndexType = typename Superclass::IndexType;
  using IndexValueType = typename Superclass::IndexValueType;
  using SizeType = typename Superclass::SizeType;
  using ImageHelperType = typename Superclass::ImageHelperType;


  using RandomGeneratorType = Statistics::MersenneTwisterRandomVariateGenerator;

  void SetSeed(const SeedType seed) override
  {
    Superclass::SetSeed(seed);
    this->m_RandomNumberGenerator->SetSeed(this->m_Seed);
  }

  virtual void SetUseClockForSeed(const bool& useClock)
  {
    if (useClock != this->m_UseClockForSeed)
    {
      this->m_UseClockForSeed = useClock;
      if (this->m_UseClockForSeed)
      {
        this->m_RandomNumberGenerator->SetSeed();
      }
      this->Modified();
    }
  }

  itkBooleanMacro(UseClockForSeed);
  itkGetConstMacro(UseClockForSeed, bool);

  virtual void SetNumberOfResultsRequested(const SearchSizeType& numberRequested)
  {
    itkDebugMacro("setting NumberOfResultsRequested to " << numberRequested);
    if (this->m_RequestMaximumNumberOfResults ||
        this->m_NumberOfResultsRequested != numberRequested)
    {
      this->m_NumberOfResultsRequested = numberRequested;
      this->m_RequestMaximumNumberOfResults = false;
      this->Modified();
    }
  }
  itkGetConstMacro(NumberOfResultsRequested, SearchSizeType);

  void Search(const InstanceIdentifier& query,
                      SubsamplePointer& results) override;

protected:
  typename LightObject::Pointer InternalClone() const override;

  UniformRandomSpatialNeighborSubsampler();
  ~UniformRandomSpatialNeighborSubsampler() override = default;

  void PrintSelf(std::ostream& os, Indent indent) const override;

  virtual RandomIntType GetIntegerVariate(RandomIntType lowerBound,
                                          RandomIntType upperBound,
                                          RandomIntType itkNotUsed(mean));

  SearchSizeType               m_NumberOfResultsRequested;
  RandomGeneratorType::Pointer m_RandomNumberGenerator;
  bool                         m_UseClockForSeed;
}; // end of class UniformRandomSpatialNeighborSubsampler

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

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

#endif