itkOtsuMultipleThresholdsCalculator.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkOtsuMultipleThresholdsCalculator.h,v $
  Language:  C++
  Date:      $Date: 2009-05-12 17:26:21 $
  Version:   $Revision: 1.8 $

  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 __itkOtsuMultipleThresholdsCalculator_h
#define __itkOtsuMultipleThresholdsCalculator_h

#include "itkHistogramAlgorithmBase.h"
#include "itkHistogram.h"

namespace itk
{

template< class TInputHistogram >
class ITK_EXPORT OtsuMultipleThresholdsCalculator :
      public HistogramAlgorithmBase< TInputHistogram >
{
public:
  typedef OtsuMultipleThresholdsCalculator        Self;
  typedef HistogramAlgorithmBase<TInputHistogram> Superclass;
  typedef SmartPointer<Self>                      Pointer;
  typedef SmartPointer<const Self>                ConstPointer;

  typedef typename TInputHistogram::MeasurementType MeasurementType;

#ifdef ITK_USE_REVIEW_STATISTICS
  typedef typename TInputHistogram::AbsoluteFrequencyType   FrequencyType;
#else
  typedef typename TInputHistogram::FrequencyType   FrequencyType;
#endif

  typedef typename NumericTraits<MeasurementType>::RealType MeanType;
  typedef typename NumericTraits<MeasurementType>::RealType VarianceType;

  typedef std::vector<MeanType>      MeanVectorType;
  typedef std::vector<FrequencyType> FrequencyVectorType;

  typedef typename TInputHistogram::InstanceIdentifier InstanceIdentifierType;
  typedef std::vector<InstanceIdentifierType>          InstanceIdentifierVectorType;

  itkTypeMacro(OtsuMultipleThresholdsCalculator, HistogramAlgorithmsBase);
  itkNewMacro(Self);

  typedef std::vector<MeasurementType> OutputType;

  const OutputType& GetOutput();

  itkSetClampMacro(NumberOfThresholds, unsigned long, 1, NumericTraits<unsigned long>::max() );
  itkGetConstMacro(NumberOfThresholds,unsigned long);

protected:
  OtsuMultipleThresholdsCalculator();
  virtual ~OtsuMultipleThresholdsCalculator() {}
  void PrintSelf(std::ostream& os, Indent indent) const;
                                                                                                                                      
  void GenerateData();

  bool IncrementThresholds(InstanceIdentifierVectorType& thresholdIds, MeanType totalMean, MeanVectorType& classMean, FrequencyVectorType& classFrequency);

private:
  unsigned long m_NumberOfThresholds;
  OutputType    m_Output;

}; // end of class
                                                                                                                                      
} // end of namespace itk

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

#endif

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