itkAdaptiveStochasticGradientDescentOptimizer.h

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 *  Copyright UMC Utrecht and contributors
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 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
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#ifndef __itkAdaptiveStochasticGradientDescentOptimizer_h
#define __itkAdaptiveStochasticGradientDescentOptimizer_h
 
#include "../StandardGradientDescent/itkStandardGradientDescentOptimizer.h"
 
namespace itk
{
 
class AdaptiveStochasticGradientDescentOptimizer :
  public StandardGradientDescentOptimizer
{
public:
 
  typedef AdaptiveStochasticGradientDescentOptimizer Self;
  typedef StandardGradientDescentOptimizer           Superclass;
 
  typedef SmartPointer< Self >       Pointer;
  typedef SmartPointer< const Self > ConstPointer;
 
  itkNewMacro( Self );
 
  itkTypeMacro( AdaptiveStochasticGradientDescentOptimizer,
    StandardGradientDescentOptimizer );
 
  typedef Superclass::MeasureType               MeasureType;
  typedef Superclass::ParametersType            ParametersType;
  typedef Superclass::DerivativeType            DerivativeType;
  typedef Superclass::CostFunctionType          CostFunctionType;
  typedef Superclass::ScalesType                ScalesType;
  typedef Superclass::ScaledCostFunctionType    ScaledCostFunctionType;
  typedef Superclass::ScaledCostFunctionPointer ScaledCostFunctionPointer;
  typedef Superclass::StopConditionType         StopConditionType;
 
  itkSetMacro( UseAdaptiveStepSizes, bool );
  itkGetConstMacro( UseAdaptiveStepSizes, bool );
 
  itkSetMacro( SigmoidMax, double );
  itkGetConstMacro( SigmoidMax, double );
 
  itkSetMacro( SigmoidMin, double );
  itkGetConstMacro( SigmoidMin, double );
 
  itkSetMacro( SigmoidScale, double );
  itkGetConstMacro( SigmoidScale, double );
 
protected:
 
  AdaptiveStochasticGradientDescentOptimizer();
  ~AdaptiveStochasticGradientDescentOptimizer() override {}
 
  void UpdateCurrentTime( void ) override;
 
  DerivativeType m_PreviousGradient;
 
private:
 
  AdaptiveStochasticGradientDescentOptimizer( const Self & ); // purposely not implemented
  void operator=( const Self & );                             // purposely not implemented
 
  bool   m_UseAdaptiveStepSizes;
  double m_SigmoidMax;
  double m_SigmoidMin;
  double m_SigmoidScale;
 
};
 
} // end namespace itk
 
#endif // end #ifndef __itkAdaptiveStochasticGradientDescentOptimizer_h