itkResampleImageFilter.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkResampleImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2002/12/15 00:43:05 $
  Version:   $Revision: 1.23 $

  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 __itkResampleImageFilter_h
#define __itkResampleImageFilter_h

#include "itkTransform.h"
#include "itkImageFunction.h"
#include "itkImageRegionIterator.h"
#include "itkImageToImageFilter.h"
#include "itkInterpolateImageFunction.h"
#include "itkSize.h"

namespace itk
{

template <class TInputImage, class TOutputImage>
class ITK_EXPORT ResampleImageFilter:
    public ImageToImageFilter<TInputImage, TOutputImage>
{
public:
  typedef ResampleImageFilter         Self;
  typedef ImageToImageFilter<TInputImage,TOutputImage>  Superclass;
  typedef SmartPointer<Self>        Pointer;
  typedef SmartPointer<const Self>  ConstPointer;
  typedef TInputImage InputImageType;
  typedef TOutputImage OutputImageType;
  typedef typename InputImageType::Pointer InputImagePointer;
  typedef typename OutputImageType::Pointer OutputImagePointer;
  typedef typename InputImageType::RegionType InputImageRegionType;

  itkNewMacro(Self);  

  itkTypeMacro(ResampleImageFilter, ImageToImageFilter);

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

  typedef Transform<double, itkGetStaticConstMacro(ImageDimension), itkGetStaticConstMacro(ImageDimension)> TransformType;
  typedef typename TransformType::Pointer TransformPointerType;

  typedef InterpolateImageFunction<InputImageType, double> InterpolatorType;
  typedef typename InterpolatorType::Pointer  InterpolatorPointerType;

  typedef Size<itkGetStaticConstMacro(ImageDimension)> SizeType;

  typedef typename TOutputImage::IndexType IndexType;

  typedef typename InterpolatorType::PointType    PointType;

  typedef typename TOutputImage::PixelType   PixelType;

  typedef typename TOutputImage::RegionType OutputImageRegionType;

  itkSetObjectMacro( Transform, TransformType ); 

  itkGetObjectMacro( Transform, TransformType );

  itkSetObjectMacro( Interpolator, InterpolatorType );

  itkGetObjectMacro( Interpolator, InterpolatorType );

  itkSetMacro( Size, SizeType );

  itkGetConstReferenceMacro( Size, SizeType );
     
  itkSetMacro(DefaultPixelValue,PixelType);

  itkGetMacro(DefaultPixelValue,PixelType);

  virtual void SetOutputSpacing( const double values[ImageDimension] );

  const double * GetOutputSpacing()
    { return m_OutputSpacing; }

  virtual void SetOutputOrigin( const double values[ImageDimension] );

  const double * GetOutputOrigin()
    { return m_OutputSpacing; }


  virtual void GenerateOutputInformation();

  virtual void GenerateInputRequestedRegion();

  virtual void BeforeThreadedGenerateData();

  unsigned long GetMTime( void ) const;

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

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

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

  SizeType                m_Size;       // Size of the output image
  TransformPointerType    m_Transform;  // Coordinate transform to use
  InterpolatorPointerType m_Interpolator;
                                        // Image function for interpolation
  PixelType               m_DefaultPixelValue; 
                                        // default pixel value if the point 
                                        // is outside the image
  double                  m_OutputSpacing[ImageDimension]; // output image spacing
  double                  m_OutputOrigin[ImageDimension];  // output image origin

};

  
} // end namespace itk
  
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkResampleImageFilter.txx"
#endif
  
#endif

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