itkGradientToMagnitudeImageFilter.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkGradientToMagnitudeImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2002/09/26 16:35:56 $
  Version:   $Revision: 1.14 $

  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 __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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