itkBinaryThresholdImageFilter.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkBinaryThresholdImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2002/04/29 19:09:21 $
  Version:   $Revision: 1.1 $

  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 __itkBinaryThresholdImageFilter_h
#define __itkBinaryThresholdImageFilter_h

#include "itkUnaryFunctorImageFilter.h"
#include "itkConceptChecking.h"

namespace itk
{
  
namespace Functor {  
  
  template< class TInput, class TOutput>
  class BinaryThreshold
  {
  public:
    BinaryThreshold() {};
    ~BinaryThreshold() {};

    void SetLowerThreshold( const TInput & thresh )
      { m_LowerThreshold = thresh; }
    void SetUpperThreshold( const TInput & thresh )
      { m_UpperThreshold = thresh; }
    void SetInsideValue( const TOutput & value )
      { m_InsideValue = value; }
    void SetOutsideValue( const TOutput & value )
      { m_OutsideValue = value; }

    inline TOutput operator()( const TInput & A )
    {
      if ( m_LowerThreshold <= A && A <= m_UpperThreshold )
        {
        return m_InsideValue;
        }
      return m_OutsideValue;
    }

  private:
    TInput      m_LowerThreshold;
    TInput      m_UpperThreshold;
    TOutput     m_InsideValue;
    TOutput     m_OutsideValue;

  };
}

template <class TInputImage, class TOutputImage>
class ITK_EXPORT BinaryThresholdImageFilter :
    public
    UnaryFunctorImageFilter<TInputImage,TOutputImage, 
    Functor::BinaryThreshold< 
              typename TInputImage::PixelType, 
              typename TOutputImage::PixelType> >
{
public:
  typedef BinaryThresholdImageFilter  Self;
  typedef UnaryFunctorImageFilter<TInputImage,TOutputImage, 
    Functor::BinaryThreshold< 
              typename TInputImage::PixelType, 
              typename TOutputImage::PixelType>   
                >  Superclass;
  typedef SmartPointer<Self>   Pointer;
  typedef SmartPointer<const Self>  ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro(BinaryThresholdImageFilter, UnaryFunctorImageFilter);

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

  itkConceptMacro(PixelTypeComparable, (Concept::Comparable<InputPixelType>));

  itkSetMacro(OutsideValue,OutputPixelType);
  
  itkGetMacro(OutsideValue,OutputPixelType);

  itkSetMacro(InsideValue,OutputPixelType);
  
  itkGetMacro(InsideValue,OutputPixelType);

  itkSetMacro( UpperThreshold, InputPixelType );
  itkSetMacro( LowerThreshold, InputPixelType );
                 
  itkGetMacro( UpperThreshold, InputPixelType );
  itkGetMacro( LowerThreshold, InputPixelType );

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

  virtual void BeforeThreadedGenerateData();

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

  InputPixelType      m_LowerThreshold;
  InputPixelType      m_UpperThreshold;
  OutputPixelType     m_InsideValue;
  OutputPixelType     m_OutsideValue;

};

} // end namespace itk

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

#endif

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