itkLabelStatisticsKeepNObjectsImageFilter.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkLabelStatisticsKeepNObjectsImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2009-08-11 14:24:43 $
  Version:   $Revision: 1.4 $

  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 __itkLabelStatisticsKeepNObjectsImageFilter_h
#define __itkLabelStatisticsKeepNObjectsImageFilter_h

#include "itkImageToImageFilter.h"
#include "itkStatisticsLabelObject.h"
#include "itkLabelMap.h"
#include "itkLabelImageToLabelMapFilter.h"
#include "itkStatisticsLabelMapFilter.h"
#include "itkStatisticsKeepNObjectsLabelMapFilter.h"
#include "itkLabelMapToLabelImageFilter.h"


namespace itk {

template<class TInputImage, class TFeatureImage>
class ITK_EXPORT LabelStatisticsKeepNObjectsImageFilter : 
    public ImageToImageFilter<TInputImage, TInputImage>
{
public:
  typedef LabelStatisticsKeepNObjectsImageFilter       Self;
  typedef ImageToImageFilter<TInputImage, TInputImage> Superclass;
  typedef SmartPointer<Self>                           Pointer;
  typedef SmartPointer<const Self>                     ConstPointer;

  typedef TInputImage                              InputImageType;
  typedef TInputImage                              OutputImageType;
  typedef typename InputImageType::Pointer         InputImagePointer;
  typedef typename InputImageType::ConstPointer    InputImageConstPointer;
  typedef typename InputImageType::RegionType      InputImageRegionType;
  typedef typename InputImageType::PixelType       InputImagePixelType;
  typedef typename OutputImageType::Pointer        OutputImagePointer;
  typedef typename OutputImageType::ConstPointer   OutputImageConstPointer;
  typedef typename OutputImageType::RegionType     OutputImageRegionType;
  typedef typename OutputImageType::PixelType      OutputImagePixelType;
  
  typedef TFeatureImage                              FeatureImageType;
  typedef typename FeatureImageType::Pointer         FeatureImagePointer;
  typedef typename FeatureImageType::ConstPointer    FeatureImageConstPointer;
  typedef typename FeatureImageType::PixelType       FeatureImagePixelType;

  itkStaticConstMacro(InputImageDimension, unsigned int,
                      TInputImage::ImageDimension);
  itkStaticConstMacro(OutputImageDimension, unsigned int,
                      TInputImage::ImageDimension);
  itkStaticConstMacro(ImageDimension, unsigned int,
                      TInputImage::ImageDimension);

  typedef StatisticsLabelObject<InputImagePixelType, itkGetStaticConstMacro(ImageDimension)>                LabelObjectType;
  typedef LabelMap< LabelObjectType >                                               LabelMapType;
  typedef LabelImageToLabelMapFilter< InputImageType, LabelMapType >                LabelizerType;
  typedef StatisticsLabelMapFilter< LabelMapType, TFeatureImage >                   LabelObjectValuatorType;
  typedef typename LabelObjectType::AttributeType                                   AttributeType;
  typedef StatisticsKeepNObjectsLabelMapFilter< LabelMapType >                      KeepNObjectsType;
  typedef LabelMapToLabelImageFilter< LabelMapType, OutputImageType >               BinarizerType;

  itkNewMacro(Self);  

  itkTypeMacro(LabelStatisticsKeepNObjectsImageFilter, 
               ImageToImageFilter);

#ifdef ITK_USE_CONCEPT_CHECKING

  itkConceptMacro(InputEqualityComparableCheck,
    (Concept::EqualityComparable<InputImagePixelType>));
  itkConceptMacro(IntConvertibleToInputCheck,
    (Concept::Convertible<int, InputImagePixelType>));
  itkConceptMacro(InputOStreamWritableCheck,
    (Concept::OStreamWritable<InputImagePixelType>));
#endif

  itkSetMacro(BackgroundValue, OutputImagePixelType);
  itkGetConstMacro(BackgroundValue, OutputImagePixelType);

  itkGetConstMacro(NumberOfObjects, unsigned long);
  itkSetMacro(NumberOfObjects, unsigned long);

  itkGetConstMacro( ReverseOrdering, bool );
  itkSetMacro( ReverseOrdering, bool );
  itkBooleanMacro( ReverseOrdering );

  itkGetConstMacro( Attribute, AttributeType );
  itkSetMacro( Attribute, AttributeType );
  void SetAttribute( const std::string & s )
    {
    this->SetAttribute( LabelObjectType::GetAttributeFromName( s ) );
    }

  void SetFeatureImage(const TFeatureImage *input)
    {
    // Process object is not const-correct so the const casting is required.
    this->SetNthInput( 1, const_cast<TFeatureImage *>(input) );
    }

  const FeatureImageType * GetFeatureImage()
    {
    return static_cast<const FeatureImageType*>(this->ProcessObject::GetInput(1));
    }

  void SetInput1(const InputImageType *input)
    {
    this->SetInput( input );
    }

  void SetInput2(const FeatureImageType *input)
    {
    this->SetFeatureImage( input );
    }


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

  void GenerateInputRequestedRegion();

  void EnlargeOutputRequestedRegion(DataObject *itkNotUsed(output));
  
  void GenerateData();
  
private:
  LabelStatisticsKeepNObjectsImageFilter(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented

  OutputImagePixelType m_BackgroundValue;
  unsigned long        m_NumberOfObjects;
  bool                 m_ReverseOrdering;
  AttributeType        m_Attribute;
}; // end of class

} // end namespace itk
  
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkLabelStatisticsKeepNObjectsImageFilter.txx"
#endif

#endif