itkGoodnessOfFitMixtureModelCostFunction.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkGoodnessOfFitMixtureModelCostFunction.h,v $
  Language:  C++
  Date:      $Date: 2002/12/07 13:22:56 $
  Version:   $Revision: 1.4 $

  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 __itkGoodnessOfFitMixtureModelCostFunction_h
#define __itkGoodnessOfFitMixtureModelCostFunction_h

#include "itkSingleValuedCostFunction.h"
#include "itkHistogram.h"
#include "itkGoodnessOfFitComponentBase.h"
#include "itkGoodnessOfFitFunctionBase.h"
#include "itkFunctionBase.h"

namespace itk{ 
namespace Statistics{

template< class TInputSample >
class ITK_EXPORT GoodnessOfFitMixtureModelCostFunction 
  : public SingleValuedCostFunction 
{
public:
  typedef GoodnessOfFitMixtureModelCostFunction Self;
  typedef SingleValuedCostFunction Superclass;
  typedef SmartPointer< Self > Pointer;
  typedef SmartPointer< const Self > ConstPointer;
  
  itkTypeMacro(GoodnessOfFitMixtureModelCostFunction, SingleValuedCostFunction) ;

  itkNewMacro(Self) ;

  typedef TInputSample InputSampleType ;
  itkStaticConstMacro(MeasurementVectorSize, unsigned int, 
                      TInputSample::MeasurementVectorSize) ;
  typedef typename TInputSample::MeasurementType MeasurementType ;
  typedef typename TInputSample::MeasurementVectorType MeasurementVectorType ;

  typedef SingleValuedCostFunction::ParametersType ParamtersType ;

  typedef SingleValuedCostFunction::MeasureType MeasureType ;

  typedef GoodnessOfFitComponentBase< TInputSample > ComponentType ;
  typedef std::vector< ComponentType* > ComponentVectorType ;

  typedef GoodnessOfFitFunctionBase< typename ComponentType::HistogramType > 
  FunctionType ;

  void AddComponent(ComponentType* component) ;
  
  void SetFunction(FunctionType* core) ;

  FunctionType* GetFunction()
  { return m_Function ; }

  virtual unsigned int GetNumberOfParameters() const ;

  virtual MeasureType GetValue( const ParametersType & parameters ) const ;

  virtual void GetDerivative( const ParametersType &,
                                    DerivativeType & ) const 
  { /* not implemented */ }

protected:
  GoodnessOfFitMixtureModelCostFunction() ;
  virtual ~GoodnessOfFitMixtureModelCostFunction() ;
  virtual void PrintSelf(std::ostream& os, Indent indent) const ;

private:
  ComponentVectorType m_Components ;
  FunctionType* m_Function ;
} ; // end of class

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

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkGoodnessOfFitMixtureModelCostFunction.txx"
#endif

#endif

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