itkGoodnessOfFitMixtureModelCostFunction.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkGoodnessOfFitMixtureModelCostFunction.h,v $
  Language:  C++
  Date:      $Date: 2009-03-04 15:23:49 $
  Version:   $Revision: 1.7 $

  Copyright (c) Insight Software 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;
  typedef typename TInputSample::MeasurementType           MeasurementType;
  typedef typename TInputSample::MeasurementVectorType     MeasurementVectorType;
  typedef typename TInputSample::MeasurementVectorSizeType MeasurementVectorSizeType;

  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 {}

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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