itkSingleValuedVnlCostFunctionAdaptor.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkSingleValuedVnlCostFunctionAdaptor.h,v $
  Language:  C++
  Date:      $Date: 2002/02/26 00:48:55 $
  Version:   $Revision: 1.1 $

  Copyright (c) 2002 Insight Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm 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 __itkSingleValuedVnlCostFunctionAdaptor_h
#define __itkSingleValuedVnlCostFunctionAdaptor_h

#include "itkSingleValuedCostFunction.h"
#include "vnl/vnl_cost_function.h"


namespace itk
{
  
class SingleValuedVnlCostFunctionAdaptor : 
          public vnl_cost_function
{
public:

  typedef   vnl_vector<double>     InternalParametersType;

  typedef   double                 InternalMeasureType;

  typedef   vnl_vector<double>     InternalDerivativeType;

  typedef SingleValuedCostFunction::ParametersType ParametersType;

  typedef SingleValuedCostFunction::DerivativeType DerivativeType;


  SingleValuedVnlCostFunctionAdaptor(unsigned int spaceDimension);

  void SetCostFunction( SingleValuedCostFunction * costFunction )
          { m_CostFunction = costFunction; }
    
  const SingleValuedCostFunction * GetCostFunction( void ) const
          { return m_CostFunction; }
    
  virtual InternalMeasureType f( const InternalParametersType & inparameters );
    
  virtual void gradf(const InternalParametersType   & inparameters,
                           InternalDerivativeType   & gradient );
    
  virtual void compute(const InternalParametersType   & x,
                             InternalMeasureType      * f, 
                             InternalDerivativeType   * g   );

  static void ConvertInternalToExternalParameters( 
                            const InternalParametersType & input,
                                  ParametersType         & output );

  static void ConvertExternalToInternalParameters(
                            const  ParametersType         & input,
                                   InternalParametersType & output );
    
  void ConvertExternalToInternalGradient(
                            const DerivativeType         & input,
                                  InternalDerivativeType & output );

private:

  SingleValuedCostFunction::Pointer   m_CostFunction;

};  // end of Class CostFunction

    
} // end namespace itk


#endif

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