itkGradientMagnitudeImageFilter.h

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/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef __itkGradientMagnitudeImageFilter_h
#define __itkGradientMagnitudeImageFilter_h

#include "itkImageToImageFilter.h"

namespace itk
{
template< typename TInputImage, typename TOutputImage >
class 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();

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

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

  itkSetMacro(UseImageSpacing, bool);
  itkGetConstMacro(UseImageSpacing, bool);

#ifdef ITK_USE_CONCEPT_CHECKING
  // Begin concept checking
  itkConceptMacro( InputHasNumericTraitsCheck,
                   ( Concept::HasNumericTraits< InputPixelType > ) );
  // End concept checking
#endif

protected:
  GradientMagnitudeImageFilter()
  {
    m_UseImageSpacing = true;
  }

  virtual ~GradientMagnitudeImageFilter() {}

  void ThreadedGenerateData(const OutputImageRegionType & outputRegionForThread,
                            ThreadIdType 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.hxx"
#endif

#endif