itkScalarImageKmeansImageFilter.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkScalarImageKmeansImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2009-05-02 05:43:55 $
  Version:   $Revision: 1.6 $

  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 __itkScalarImageKmeansImageFilter_h
#define __itkScalarImageKmeansImageFilter_h

#include "itkImageToImageFilter.h"
#include "itkImage.h"
#include "itkNumericTraits.h"

#include "itkKdTree.h"
#include "itkKdTreeBasedKmeansEstimator.h"
#include "itkWeightedCentroidKdTreeGenerator.h"

#ifdef ITK_USE_REVIEW_STATISTICS
#include "itkEuclideanDistanceMetric.h"
#include "itkSampleClassifierFilter.h"
#include "itkImageToListSampleAdaptor.h"
#include "itkMinimumDecisionRule2.h"
#else
#include "itkMinimumDecisionRule.h"
#include "itkEuclideanDistance.h"
#include "itkSampleClassifier.h"
#include "itkScalarImageToListAdaptor.h"
#endif

#include "itkImageRegion.h"
#include "itkRegionOfInterestImageFilter.h"

#include <vector>

namespace itk
{
template <class TInputImage >
class ITK_EXPORT ScalarImageKmeansImageFilter :
    public ImageToImageFilter< TInputImage, Image<unsigned char,
             ::itk::GetImageDimension<TInputImage>::ImageDimension> >
{
public:
  itkStaticConstMacro(ImageDimension, unsigned int,
                      TInputImage::ImageDimension);

  typedef TInputImage InputImageType;
  typedef Image<unsigned char,
             ::itk::GetImageDimension<TInputImage>::ImageDimension> OutputImageType;

  typedef ScalarImageKmeansImageFilter                         Self;
  typedef ImageToImageFilter< InputImageType, OutputImageType> Superclass;
  typedef SmartPointer<Self>                                   Pointer;
  typedef SmartPointer<const Self>                             ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro(ScalarImageKmeansImageFilter, ImageToImageFilter);

  typedef typename InputImageType::PixelType  InputPixelType;
  typedef typename OutputImageType::PixelType OutputPixelType;

  typedef typename NumericTraits< InputPixelType >::RealType RealPixelType;

#ifdef ITK_USE_REVIEW_STATISTICS
  typedef itk::Statistics::ImageToListSampleAdaptor< InputImageType > AdaptorType;
#else
  typedef itk::Statistics::ScalarImageToListAdaptor< 
                                   InputImageType > AdaptorType;
#endif  

  typedef typename AdaptorType::MeasurementVectorType  MeasurementVectorType;

#ifdef ITK_USE_REVIEW_STATISTICS
  typedef itk::Statistics::DistanceToCentroidMembershipFunction< MeasurementVectorType > MembershipFunctionType;
  typedef itk::Statistics::SampleClassifierFilter< AdaptorType > ClassifierType;
  typedef itk::Statistics::MinimumDecisionRule2                  DecisionRuleType;
#else
  typedef itk::Statistics::EuclideanDistance< MeasurementVectorType > MembershipFunctionType;
  typedef itk::Statistics::SampleClassifier< AdaptorType > ClassifierType;
  typedef itk::MinimumDecisionRule                         DecisionRuleType;
#endif

#ifdef ITK_USE_REVIEW_STATISTICS
  typedef typename ClassifierType::ClassLabelVectorType ClassLabelVectorType;
#else
  typedef std::vector< unsigned int > ClassLabelVectorType;
#endif
  
#ifdef ITK_USE_REVIEW_STATISTICS
  typedef typename ClassifierType::MembershipFunctionVectorType MembershipFunctionVectorType;
  typedef typename MembershipFunctionType::CentroidType  MembershipFunctionOriginType;
#else
  typedef typename MembershipFunctionType::OriginType  MembershipFunctionOriginType;
#endif
  
  typedef typename MembershipFunctionType::Pointer     MembershipFunctionPointer;
  
  typedef itk::Statistics::WeightedCentroidKdTreeGenerator< 
                                                      AdaptorType > 
                                                                TreeGeneratorType;
  typedef typename TreeGeneratorType::KdTreeType                TreeType;
  typedef itk::Statistics::KdTreeBasedKmeansEstimator<TreeType> EstimatorType;

  typedef typename EstimatorType::ParametersType ParametersType;

  typedef typename InputImageType::RegionType        ImageRegionType;
  
  typedef RegionOfInterestImageFilter< 
                                 InputImageType,
                                 InputImageType  > RegionOfInterestFilterType;


  void AddClassWithInitialMean( RealPixelType mean );

  itkGetConstReferenceMacro( FinalMeans, ParametersType );

  itkSetMacro( UseNonContiguousLabels, bool );
  itkGetConstReferenceMacro( UseNonContiguousLabels, bool );
  itkBooleanMacro( UseNonContiguousLabels );

  void SetImageRegion( const ImageRegionType & region );

  itkGetConstReferenceMacro( ImageRegion, ImageRegionType );

#ifdef ITK_USE_CONCEPT_CHECKING

  itkConceptMacro(InputHasNumericTraitsCheck,
                  (Concept::HasNumericTraits<InputPixelType>));

#endif

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

  void GenerateData();

private:
  ScalarImageKmeansImageFilter(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented

  typedef std::vector< RealPixelType > MeansContainer;

  MeansContainer  m_InitialMeans;

  ParametersType  m_FinalMeans;

  bool m_UseNonContiguousLabels;

  ImageRegionType m_ImageRegion;

  bool m_ImageRegionDefined;
};
  
} // end namespace itk

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

#endif

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