itkGradientMagnitudeImageFilter.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkGradientMagnitudeImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2008-10-16 16:45:08 $
  Version:   $Revision: 1.29 $

  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 __itkGradientMagnitudeImageFilter_h
#define __itkGradientMagnitudeImageFilter_h

#include "itkImageToImageFilter.h"
#include "itkImage.h"

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

  itkNewMacro(Self);

  itkTypeMacro(GradientMagnitudeImageFilter, ImageToImageFilter);

  typedef typename TOutputImage::PixelType                 OutputPixelType;
  typedef typename TInputImage::PixelType                  InputPixelType;
  typedef typename NumericTraits<InputPixelType>::RealType RealType;

  itkStaticConstMacro(ImageDimension, unsigned int,
                      TOutputImage::ImageDimension);

  typedef TInputImage                       InputImageType;
  typedef TOutputImage                      OutputImageType;
  typedef typename InputImageType::Pointer  InputImagePointer;
  typedef typename OutputImageType::Pointer OutputImagePointer;

  typedef typename Superclass::OutputImageRegionType OutputImageRegionType;

  virtual void GenerateInputRequestedRegion() throw(InvalidRequestedRegionError);

  void SetUseImageSpacingOn()
    { this->SetUseImageSpacing(true); }

  void SetUseImageSpacingOff()
    { this->SetUseImageSpacing(false); }

  itkSetMacro(UseImageSpacing, bool);
  itkGetMacro(UseImageSpacing, bool);

#ifdef ITK_USE_CONCEPT_CHECKING

  itkConceptMacro(InputHasNumericTraitsCheck,
                  (Concept::HasNumericTraits<InputPixelType>));

#endif

protected:
  GradientMagnitudeImageFilter()
    {
    m_UseImageSpacing = true;
    }
  virtual ~GradientMagnitudeImageFilter() {}

  void ThreadedGenerateData(const OutputImageRegionType& outputRegionForThread,
                            int threadId );

  void PrintSelf(std::ostream&, Indent) const;

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

  bool m_UseImageSpacing;

};
  
} // end namespace itk

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

#endif