itkLabelVotingImageFilter.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkLabelVotingImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2009-01-24 20:02:57 $
  Version:   $Revision: 1.5 $

  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 __itkLabelVotingImageFilter_h
#define __itkLabelVotingImageFilter_h

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

namespace itk
{
template <typename TInputImage, typename TOutputImage = TInputImage>
class ITK_EXPORT LabelVotingImageFilter :
    public ImageToImageFilter< TInputImage, TOutputImage >
{
public:
  typedef LabelVotingImageFilter                          Self;
  typedef ImageToImageFilter< TInputImage, TOutputImage > Superclass;
  typedef SmartPointer<Self>                              Pointer;
  typedef SmartPointer<const Self>                        ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro(LabelVotingImageFilter, ImageToImageFilter);

  typedef typename TOutputImage::PixelType OutputPixelType;
  typedef typename TInputImage::PixelType  InputPixelType;

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

  typedef TInputImage                           InputImageType;
  typedef TOutputImage                          OutputImageType;
  typedef typename InputImageType::ConstPointer InputImagePointer;
  typedef typename OutputImageType::Pointer     OutputImagePointer;

  typedef typename Superclass::OutputImageRegionType OutputImageRegionType;

  void SetLabelForUndecidedPixels( const OutputPixelType l )
    {
    this->m_LabelForUndecidedPixels = l;
    this->m_HasLabelForUndecidedPixels = true;
    this->Modified();
    }

  OutputPixelType GetLabelForUndecidedPixels() const
    {
    return this->m_LabelForUndecidedPixels;
    }

  void UnsetLabelForUndecidedPixels()
    {
    if ( this->m_HasLabelForUndecidedPixels )
      {
      this->m_HasLabelForUndecidedPixels = false;
      this->Modified();
      }
    }

#ifdef ITK_USE_CONCEPT_CHECKING

  itkConceptMacro(InputConvertibleToOutputCheck,
    (Concept::Convertible<InputPixelType, OutputPixelType>));
  itkConceptMacro(IntConvertibleToInputCheck,
    (Concept::Convertible<int, InputPixelType>));
  itkConceptMacro(SameDimensionCheck,
    (Concept::SameDimension<InputImageDimension, ImageDimension>));
  itkConceptMacro(InputConvertibleToUnsignedIntCheck,
    (Concept::Convertible<InputPixelType, unsigned int>));
  itkConceptMacro(IntConvertibleToOutputPixelType,
    (Concept::Convertible<int, OutputPixelType>));
  itkConceptMacro(InputPlusIntCheck,
    (Concept::AdditiveOperators<InputPixelType, int>));
  itkConceptMacro(InputIncrementDecrementOperatorsCheck,
    (Concept::IncrementDecrementOperators<InputPixelType>));
  itkConceptMacro(OutputOStreamWritableCheck,
    (Concept::OStreamWritable<OutputPixelType>));

#endif

protected:
  LabelVotingImageFilter() { this->m_HasLabelForUndecidedPixels = false; }
  virtual ~LabelVotingImageFilter() {}  

  void BeforeThreadedGenerateData ();
  void ThreadedGenerateData
    ( const OutputImageRegionType &outputRegionForThread, int threadId);

  void PrintSelf(std::ostream&, Indent) const;

  InputPixelType ComputeMaximumInputValue();

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

  OutputPixelType m_LabelForUndecidedPixels;
  bool            m_HasLabelForUndecidedPixels;
  InputPixelType  m_TotalLabelCount;
};
  
} // end namespace itk

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

#endif