itkGradientToMagnitudeImageFilter.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkGradientToMagnitudeImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2003/09/10 14:28:48 $
  Version:   $Revision: 1.17 $

  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 __itkGradientToMagnitudeImageFilter_h
#define __itkGradientToMagnitudeImageFilter_h

#include "itkUnaryFunctorImageFilter.h"

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

  inline TOutput operator()( const TInput & A )
  {
    return static_cast<TOutput>( A.GetNorm() );
  }
}; 
}
 
template <class TInputImage, class TOutputImage>
class ITK_EXPORT GradientToMagnitudeImageFilter :
    public
UnaryFunctorImageFilter<TInputImage,TOutputImage, 
                        Functor::GradientMagnitude< typename TInputImage::PixelType, 
                                                    typename TOutputImage::PixelType>   >
{
public:
  typedef GradientToMagnitudeImageFilter Self;
  typedef UnaryFunctorImageFilter<TInputImage,TOutputImage, 
                                  Functor::GradientMagnitude< typename TInputImage::PixelType, 
                                                              typename TOutputImage::PixelType> > Superclass;
  typedef SmartPointer<Self> Pointer;
  typedef SmartPointer<const Self> ConstPointer;
    
  itkNewMacro(Self);

protected:
  GradientToMagnitudeImageFilter() {}
  virtual ~GradientToMagnitudeImageFilter() {}
    
private:
  GradientToMagnitudeImageFilter(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented
};
 
} // end namespace itk


#endif

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