itkFastChamferDistanceImageFilter.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkFastChamferDistanceImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2008-12-21 19:13:11 $
  Version:   $Revision: 1.7 $

  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 __itkFastChamferDistanceImageFilter_h
#define __itkFastChamferDistanceImageFilter_h

#include <itkImageToImageFilter.h>
#include <itkImageRegionIteratorWithIndex.h>
#include <itkNarrowBand.h>

namespace itk
{

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

  itkNewMacro(Self);

  itkTypeMacro( FastChamferDistanceImageFilter, ImageToImageFilter );

  typedef   TInputImage       InputImageType;

  typedef   TOutputImage      OutputImageType;

  typedef typename InputImageType::RegionType   RegionType;

  typedef typename InputImageType::PixelType   PixelType;

  typedef typename RegionType::IndexType  IndexType;

  typedef typename InputImageType::OffsetType  OffsetType;

  typedef typename RegionType::SizeType   SizeType;

  itkStaticConstMacro(ImageDimension, unsigned int,
                      InputImageType::ImageDimension);
  itkStaticConstMacro(OutputImageDimension, unsigned int,
                      OutputImageType::ImageDimension);

  typedef typename InputImageType::ConstPointer InputImagePointer;

  typedef BandNode<IndexType,PixelType>    BandNodeType;
  typedef NarrowBand<BandNodeType>         NarrowBandType;
  typedef typename NarrowBandType::Pointer NarrowBandPointer;

  
  itkSetVectorMacro( Weights, float, ImageDimension);
  itkGetVectorMacro( Weights, const float, ImageDimension);

  
  itkSetMacro( MaximumDistance, float);
  itkGetMacro( MaximumDistance, float);

  void SetRegionToProcess( const RegionType &r)
    {
    if ( m_RegionToProcess != r)
      {
      m_RegionToProcess = r;
      this->Modified();
      }
    }
  RegionType GetRegionToProcess() const
    {
    return m_RegionToProcess;
    }

  void SetNarrowBand( NarrowBandType * ptr)
    {  
    if ( m_NarrowBand != ptr )
      {
      m_NarrowBand = ptr;
      this->Modified();
      }
    }
  
  NarrowBandPointer GetNarrowBand() const
    {
    return m_NarrowBand;
    }
  
#ifdef ITK_USE_CONCEPT_CHECKING

  itkConceptMacro(SameDimensionCheck,
    (Concept::SameDimension<ImageDimension, OutputImageDimension>));
  itkConceptMacro(SameTypeCheck,
    (Concept::SameType<PixelType, typename TOutputImage::PixelType>));
  itkConceptMacro(FloatConvertibleToPixelTypeCheck,
    (Concept::Convertible<float, PixelType>));
  itkConceptMacro(PixelTypeConvertibleToFloatCheck,
    (Concept::Convertible<PixelType, float>));
  itkConceptMacro(PixelTypeGreaterThanFloatCheck,
    (Concept::GreaterThanComparable<PixelType, float>));
  itkConceptMacro(PixelTypeLessThanFloatCheck,
    (Concept::LessThanComparable<PixelType, float>));
  itkConceptMacro(PixelTypeFloatAdditiveOperatorsCheck,
    (Concept::AdditiveOperators<PixelType, float, float>));
  itkConceptMacro(FloatGreaterThanPixelTypeCheck,
    (Concept::GreaterThanComparable<float, PixelType>));
  itkConceptMacro(FloatLessThanPixelTypeCheck,
    (Concept::LessThanComparable<float, PixelType>));

#endif

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

  void GenerateData();  

private:   
  FastChamferDistanceImageFilter(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented
  
  float  m_MaximumDistance;
  
  float  m_Weights[ImageDimension];

  NarrowBandPointer m_NarrowBand;
  
  typename InputImageType::RegionType m_RegionToProcess;

  
}; // end of FastChamferDistanceImageFilter class

} //end namespace itk


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

#endif