itkHistogram.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkHistogram.h,v $
  Language:  C++
  Date:      $Date: 2002/09/11 19:57:14 $
  Version:   $Revision: 1.22 $

  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 __itkHistogram_h
#define __itkHistogram_h

#include <vector>

#include "itkIndex.h"
#include "itkSize.h"
#include "itkFixedArray.h"
#include "itkSample.h"
#include "itkDenseFrequencyContainer.h"
#include "itkSparseFrequencyContainer.h"

namespace itk{
namespace Statistics{

template < class TMeasurement = float, unsigned int VMeasurementVectorSize = 1,
  class TFrequencyContainer = DenseFrequencyContainer< float > > 
class ITK_EXPORT Histogram 
  : public Sample < FixedArray< TMeasurement, VMeasurementVectorSize > >
{
public:
  typedef Histogram  Self ;
  typedef Sample< FixedArray< TMeasurement, VMeasurementVectorSize > > Superclass ;
  typedef SmartPointer<Self> Pointer ;

  itkTypeMacro(Histogram, Sample) ;

  itkNewMacro(Self) ;

  itkStaticConstMacro(MeasurementVectorSize, unsigned int,
                      VMeasurementVectorSize);
 
  typedef TMeasurement MeasurementType ;

  typedef typename Superclass::MeasurementVectorType MeasurementVectorType ;
  typedef typename Superclass::InstanceIdentifier InstanceIdentifier ;
  typedef MeasurementVectorType ValueType ;

  typedef TFrequencyContainer FrequencyContainerType ;
  typedef typename FrequencyContainerType::Pointer FrequencyContainerPointer ;

  typedef typename FrequencyContainerType::FrequencyType FrequencyType ;

  typedef itk::Index< VMeasurementVectorSize >  IndexType;
  typedef typename IndexType::IndexValueType  IndexValueType;

  typedef itk::Size< VMeasurementVectorSize > SizeType ;
  typedef typename SizeType::SizeValueType SizeValueType ;

  typedef std::vector< MeasurementType > BinMinVectorType ;
  typedef std::vector< MeasurementType > BinMaxVectorType ;
  typedef std::vector< BinMinVectorType > BinMinContainerType ;
  typedef std::vector< BinMaxVectorType > BinMaxContainerType ;

  void Initialize(const SizeType &size) ;
  

  void Initialize(const SizeType &size, MeasurementVectorType lowerBound,
                  MeasurementVectorType upperBound) ;

  IndexType& GetIndex(const MeasurementVectorType &measurement) ;
  
  IndexType& GetIndex(const InstanceIdentifier &id) ;

  bool IsIndexOutOfBound(const IndexType &index) const;

  InstanceIdentifier GetInstanceIdentifier(const IndexType &index) const ;
  
  unsigned int GetNumberOfInstances() const ;

  unsigned int Size() const ;

  unsigned int Size(const unsigned int &dimension) const 
  { return static_cast< int >(m_Size[dimension]) ; }

  SizeType GetSize() const
  { return m_Size ; }

  SizeValueType GetSize(const unsigned int dimension) const
  {
    return m_Size[dimension] ; 
  }

  MeasurementType& GetBinMin(const unsigned int dimension, 
                             const unsigned long nbin) 
  { return m_Min[dimension][nbin] ; }
  
  MeasurementType& GetBinMax(const unsigned int dimension,
                             const unsigned long nbin)
  { return m_Max[dimension][nbin] ; }
  
  void SetBinMin(const unsigned int dimension, const unsigned long nbin,
                 const MeasurementType min)
  { m_Min[dimension][nbin] = min ; }
  
  void SetBinMax(const unsigned int dimension, 
                 unsigned long nbin, const MeasurementType max)
  { m_Max[dimension][nbin] = max ; }
  
  MeasurementType& GetBinMinFromValue(const unsigned int dimension, 
                                      const float value ) const  ;
  
  MeasurementType& GetBinMaxFromValue(const unsigned int dimension, 
                                      const float value ) const ;
  
  BinMinVectorType& GetDimensionMins(const unsigned int dimension) const
  { return m_Min[dimension] ; }
  
  BinMaxVectorType& GetDimensionMaxs(const unsigned int dimension) const
  {  return m_Max[dimension] ; }
  
  BinMinContainerType& GetMins() const
  { return m_Min ; }
  
  BinMaxContainerType& GetMaxs() const
  { return m_Max ; }
  
  MeasurementVectorType& GetHistogramMinFromValue(const MeasurementVectorType 
                                                  &measurement)  ; 
  
  MeasurementVectorType& GetHistogramMaxFromValue(const MeasurementVectorType 
                                                  &measurement) ; 
  
  MeasurementVectorType& GetHistogramMinFromIndex(const IndexType &index) ;
  
  MeasurementVectorType& GetHistogramMaxFromIndex(const IndexType &index) ; 
  
  FrequencyType GetFrequency(const InstanceIdentifier &id) const
  { return m_FrequencyContainer->GetFrequency(id) ; }

  FrequencyType GetFrequency(const IndexType &index) const ;

  void SetFrequency(const FrequencyType value) ;

  void SetFrequency(const InstanceIdentifier &id, const FrequencyType value) 
  { m_FrequencyContainer->SetFrequency(id, value) ; }

  void SetFrequency(const IndexType &index, 
                    const FrequencyType value) ;
  
  void SetFrequency(const MeasurementVectorType &measurement, 
                    const FrequencyType value) ;


  void IncreaseFrequency(const InstanceIdentifier &id,
                         const FrequencyType value) 
  { m_FrequencyContainer->IncreaseFrequency(id, value) ; }

  void IncreaseFrequency(const IndexType &index, 
                         const FrequencyType value) ;
  
  void IncreaseFrequency(const MeasurementVectorType &measurement, 
                         const FrequencyType value) ;
  
  MeasurementVectorType& GetMeasurementVector(const InstanceIdentifier &id) ;
  
  MeasurementVectorType& GetMeasurementVector(const IndexType &index) ;
  
  MeasurementType& GetMeasurement(const unsigned long n,
                                  const unsigned int dimension) const ;

  FrequencyType GetFrequency(const unsigned long n,
                             const unsigned int dimension) const ;

  FrequencyType GetTotalFrequency(const unsigned int &dimension) const ;

  double Quantile(const unsigned int dimension, const double &p) ;

  class Iterator ;
  friend class Iterator ;

  Iterator  Begin()
  { 
    Iterator iter(0, this) ; 
    return iter ;
  }
           
  Iterator  End()        
  {
    return Iterator(m_OffsetTable[VMeasurementVectorSize], this) ;
  }
  

  class Iterator
  {
  public:
    Iterator(){};
    
    Iterator(Pointer histogram) 
    { 
      m_Id = 0 ;
      m_Histogram = histogram; 
    } 
    
    Iterator(InstanceIdentifier id, Pointer histogram)
      : m_Id(id), m_Histogram(histogram)
    {}
    
    FrequencyType GetFrequency() const
    { 
      return  m_Histogram->GetFrequency(m_Id) ;
    }
    
    void SetFrequency(const FrequencyType value) 
    { 
      m_Histogram->SetFrequency(m_Id, value); 
    }

    InstanceIdentifier GetInstanceIdentifier() const
    { return m_Id ; }

    MeasurementVectorType& GetMeasurementVector() const
    { 
      return m_Histogram->GetMeasurementVector(m_Id) ;
    } 

    Iterator& operator++() 
    { 
      ++m_Id; 
      return *this;
    }
    
    bool operator!=(const Iterator& it) 
    { return (m_Id != it.m_Id); }
    
    bool operator==(const Iterator& it) 
    { return (m_Id == it.m_Id); }
    
    Iterator& operator=(const Iterator& it)
    { 
      m_Id  = it.m_Id;
      m_Histogram = it.m_Histogram ; 
      return *this ;
    }

    Iterator(const Iterator& it)
    { 
      m_Id        = it.m_Id;
      m_Histogram = it.m_Histogram ; 
    }
   
  private:
    // Iterator pointing DenseFrequencyContainer
    InstanceIdentifier m_Id;
    
    // Pointer of DenseFrequencyContainer
    Pointer m_Histogram ;
  } ; // end of iterator class

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

  // The number of bins for each dimension
  SizeType m_Size ;
  
  // lower bound of each bin
  std::vector< std::vector<MeasurementType> > m_Min ;
  
  // upper bound of each bin
  std::vector< std::vector<MeasurementType> > m_Max ;
  
private:
  Histogram(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented

  InstanceIdentifier          m_OffsetTable[VMeasurementVectorSize + 1] ;
  FrequencyContainerPointer   m_FrequencyContainer ;
  unsigned int                m_NumberOfInstances ;
  MeasurementVectorType       m_TempMeasurementVector ;
  IndexType                   m_TempIndex ;
} ; // end of class

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

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

#endif

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