otbSVMCrossValidationCostFunction.h

Go to the documentation of this file.

/*=========================================================================

  Program:   ORFEO Toolbox
  Language:  C++
  Date:      $Date$
  Version:   $Revision$


  Copyright (c) Centre National d'Etudes Spatiales. All rights reserved.
  See OTBCopyright.txt for details.


     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/
#ifndef __otbSVMCrossValidationCostFunction_h
#define __otbSVMCrossValidationCostFunction_h

#include "otbSVMModel.h"
#include "itkSingleValuedCostFunction.h"

namespace otb
{

template <class TModel>
class ITK_EXPORT SVMCrossValidationCostFunction
  : public itk::SingleValuedCostFunction
{
public:
  typedef SVMCrossValidationCostFunction Self;
  typedef itk::SingleValuedCostFunction  Superclass;
  typedef itk::SmartPointer<Self>        Pointer;
  typedef itk::SmartPointer<const Self>  ConstPointer;

  itkNewMacro(Self);

  typedef TModel                         SVMModelType;
  typedef typename SVMModelType::Pointer SVMModelPointer;

  typedef typename Superclass::MeasureType         MeasurementType;
  typedef typename Superclass::ParametersType      ParametersType;
  typedef typename Superclass::ParametersValueType ParametersValueType;
  typedef typename Superclass::DerivativeType      DerivativeType;

  itkSetObjectMacro(Model, SVMModelType);
  itkGetObjectMacro(Model, SVMModelType);

  itkSetMacro(NumberOfCrossValidationFolders, unsigned int);
  itkGetMacro(NumberOfCrossValidationFolders, unsigned int);

  itkSetMacro(DerivativeStep, ParametersValueType);
  itkGetMacro(DerivativeStep, ParametersValueType);

  virtual MeasureType GetValue(const ParametersType& parameters) const;

  virtual void GetDerivative(const ParametersType& parameters, DerivativeType& derivative) const;

  virtual unsigned int GetNumberOfParameters(void) const;

protected:
  SVMCrossValidationCostFunction();
  virtual ~SVMCrossValidationCostFunction();

  virtual void UpdateParameters(struct svm_parameter& svm_parameters, const ParametersType& parameters) const;

private:
  SVMCrossValidationCostFunction(const Self &); //purposely not implemented
  void operator =(const Self&); //purposely not implemented

  SVMModelPointer m_Model;

  unsigned int m_NumberOfCrossValidationFolders;

  ParametersValueType m_DerivativeStep;

}; // class SVMCrossValidationCostFunction

} // namespace otb

#ifndef OTB_MANUAL_INSTANTIATION
#include "otbSVMCrossValidationCostFunction.txx"
#endif

#endif