otbSVMMarginSampler.h

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/*
 * Copyright (C) 2005-2022 Centre National d'Etudes Spatiales (CNES)
 *
 * This file is part of Orfeo Toolbox
 *
 *     https://www.orfeo-toolbox.org/
 *
 * 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
 *
 * 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 otbSVMMarginSampler_h
#define otbSVMMarginSampler_h
 
#include "itkSampleClassifierFilter.h"
#include "itkVectorImage.h"
 
namespace otb
{
 
template <class TSample, class TModel>
class ITK_EXPORT SVMMarginSampler : public itk::Statistics::SampleClassifierFilter<TSample>
{
public:
  typedef SVMMarginSampler                                 Self;
  typedef itk::Statistics::SampleClassifierFilter<TSample> Superclass;
  typedef itk::SmartPointer<Self>                          Pointer;
  typedef itk::SmartPointer<const Self>                    ConstPointer;
 
  itkTypeMacro(SVMMarginSampler, itk::Statistics::SampleClassifierFilter);
  itkNewMacro(Self);
 
  typedef typename Superclass::MembershipSampleType OutputType;
 
  typedef typename TSample::MeasurementType       MeasurementType;
  typedef typename TSample::MeasurementVectorType MeasurementVectorType;
  typedef std::pair<unsigned int, double> IndexAndDistanceType;
  typedef std::vector<IndexAndDistanceType> IndexAndDistanceVectorType;
  typedef std::vector<unsigned int>         IndexVectorType;
 
 
  static bool Compare(const IndexAndDistanceType& l1, const IndexAndDistanceType& l2)
  {
    bool resp = l2.second > l1.second;
    return resp;
  }
 
  typedef TModel                         SVMModelType;
  typedef typename SVMModelType::Pointer SVMModelPointer;
 
  itkSetMacro(NumberOfCandidates, unsigned int);
  itkGetMacro(NumberOfCandidates, unsigned int);
 
  itkSetObjectMacro(Model, SVMModelType);
 
  itkGetObjectMacro(Model, SVMModelType);
 
  const IndexVectorType& GetMarginSamples()
  {
    return m_MarginSamples;
  }
 
protected:
  SVMMarginSampler();
  ~SVMMarginSampler() override
  {
  }
  void PrintSelf(std::ostream& os, itk::Indent indent) const override;
 
  void         GenerateData() override;
  virtual void DoMarginSampling();
 
private:
  SVMModelPointer m_Model;
 
  unsigned int m_NumberOfCandidates;
 
  IndexVectorType m_MarginSamples;
 
}; // end of class
 
 
} // end of namespace otb
 
 
#ifndef OTB_MANUAL_INSTANTIATION
#include "otbSVMMarginSampler.hxx"
#endif
 
#endif