itkSignedDanielssonDistanceMapImageFilter.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkSignedDanielssonDistanceMapImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2005/04/17 23:02:20 $
  Version:   $Revision: 1.3 $

  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 __itkSignedDanielssonDistanceMapImageFilter_h
#define __itkSignedDanielssonDistanceMapImageFilter_h

#include <itkImageToImageFilter.h>
#include <itkDanielssonDistanceMapImageFilter.h>
#include "itkSubtractImageFilter.h"


//Simple functor to invert an image for Outside Danielsson distance map
namespace itk
{
  namespace Functor
    {
    template <class InputPixelType> class InvertIntensityFunctor
    {
    public:
      InputPixelType operator()( InputPixelType input )
        {
        if (input)
          {
          return NumericTraits<InputPixelType>::Zero;
          }
        else
          {
          return NumericTraits<InputPixelType>::One;
          }
        }
    };
  }
}


namespace itk
{

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

  itkNewMacro(Self);

  itkTypeMacro( SignedDanielssonDistanceMapImageFilter, ImageToImageFilter );

  typedef   TInputImage       InputImageType;

  typedef   TOutputImage      OutputImageType;

  typedef typename InputImageType::RegionType   RegionType;

  typedef typename RegionType::IndexType  IndexType;

  typedef typename InputImageType::OffsetType  OffsetType;

  typedef typename InputImageType::PixelType  PixelType;

  typedef typename RegionType::SizeType   SizeType;
  
  itkStaticConstMacro(InputImageDimension, unsigned int,
                      InputImageType::ImageDimension);

  typedef Image< OffsetType,
                 itkGetStaticConstMacro(InputImageDimension)> VectorImageType;

  typedef typename InputImageType::ConstPointer InputImagePointer;

  typedef typename OutputImageType::Pointer OutputImagePointer;

  typedef typename VectorImageType::Pointer VectorImagePointer;

  itkSetMacro( SquaredDistance, bool );

  itkGetConstReferenceMacro( SquaredDistance, bool );

  itkBooleanMacro( SquaredDistance );

  itkSetMacro( UseImageSpacing, bool );

  itkGetConstReferenceMacro( UseImageSpacing, bool );

  itkBooleanMacro( UseImageSpacing );

  itkSetMacro( InsideIsPositive, bool );

  itkGetConstReferenceMacro( InsideIsPositive, bool );

  itkBooleanMacro( InsideIsPositive );
  
  OutputImageType * GetVoronoiMap(void);

  OutputImageType * GetDistanceMap(void);

  VectorImageType * GetVectorDistanceMap(void);

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

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

  bool                  m_SquaredDistance;
  bool                  m_UseImageSpacing;
  bool                  m_InsideIsPositive;   // ON is treated as inside pixels
}; // end of SignedDanielssonDistanceMapImageFilter class

} //end namespace itk


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

#endif

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