itkExpandImageFilter.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkExpandImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2008-10-14 19:20:33 $
  Version:   $Revision: 1.12 $

  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 __itkExpandImageFilter_h
#define __itkExpandImageFilter_h

#include "itkImageToImageFilter.h"
#include "itkInterpolateImageFunction.h"
#include "itkLinearInterpolateImageFunction.h"

namespace itk
{

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

  itkNewMacro(Self);  

  itkTypeMacro(ExpandImageFilter, ImageToImageFilter);

  typedef typename TOutputImage::RegionType OutputImageRegionType;

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

  typedef typename Superclass::InputImageType  InputImageType;
  typedef typename Superclass::OutputImageType OutputImageType;
  typedef typename OutputImageType::PixelType  OutputPixelType;
  typedef typename InputImageType::Pointer     InputImagePointer;
  typedef typename OutputImageType::Pointer    OutputImagePointer;

  typedef double                             CoordRepType;
  typedef InterpolateImageFunction<InputImageType,CoordRepType> 
                                             InterpolatorType;
  typedef typename InterpolatorType::Pointer InterpolatorPointer;
  typedef LinearInterpolateImageFunction<InputImageType,CoordRepType> 
                                             DefaultInterpolatorType;

  itkSetObjectMacro( Interpolator, InterpolatorType );

  itkGetObjectMacro( Interpolator, InterpolatorType );

  virtual void SetExpandFactors( const unsigned int factors[] );
  virtual void SetExpandFactors( const unsigned int factor );

  virtual const unsigned int * GetExpandFactors() const
  { return m_ExpandFactors; }

  itkSetMacro( EdgePaddingValue, OutputPixelType );

  itkGetMacro( EdgePaddingValue, OutputPixelType );

  virtual void GenerateOutputInformation();

  virtual void GenerateInputRequestedRegion();

#ifdef ITK_USE_CONCEPT_CHECKING

  itkConceptMacro(InputHasNumericTraitsCheck,
    (Concept::HasNumericTraits<typename TInputImage::PixelType>));
  itkConceptMacro(OutputHasNumericTraitsCheck,
    (Concept::HasNumericTraits<OutputPixelType>));

#endif

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

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

  virtual void BeforeThreadedGenerateData();

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

  unsigned int           m_ExpandFactors[ImageDimension];
  InterpolatorPointer    m_Interpolator;
  OutputPixelType        m_EdgePaddingValue;
 
};

} // end namespace itk

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

#endif

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