itkBSplineDecompositionImageFilter.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkBSplineDecompositionImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2003/09/10 14:28:43 $
  Version:   $Revision: 1.6 $

  Copyright (c) Insight Software Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.

  Portions of this code are covered under the VTK copyright.
  See VTKCopyright.txt or http://www.kitware.com/VTKCopyright.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 __itkBSplineDecompositionImageFilter_h
#define __itkBSplineDecompositionImageFilter_h

#include <vector>

#include "itkImageLinearIteratorWithIndex.h"
#include "vnl/vnl_matrix.h"

#include "itkImageToImageFilter.h"

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

  itkTypeMacro(BSplineDecompositionImageFilter, ImageToImageFilter);
 
  itkNewMacro( Self );

  typedef typename Superclass::InputImageType InputImageType;
  typedef typename Superclass::InputImagePointer InputImagePointer;
  typedef typename Superclass::InputImageConstPointer InputImageConstPointer;
  typedef typename Superclass::OutputImagePointer OutputImagePointer;

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

  typedef itk::ImageLinearIteratorWithIndex<TOutputImage> OutputLinearIterator;

  void SetSplineOrder(unsigned int SplineOrder);
  itkGetMacro(SplineOrder, int);


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

  void GenerateData( );

  void GenerateInputRequestedRegion();

  void EnlargeOutputRequestedRegion( DataObject *output ); 

  std::vector<double>       m_Scratch;       // temp storage for processing of Coefficients
  typename TInputImage::SizeType   m_DataLength;  // Image size
  unsigned int              m_SplineOrder;   // User specified spline order (3rd or cubic is the default)
  double                    m_SplinePoles[3];// Poles calculated for a given spline order
  int                       m_NumberOfPoles; // number of poles
  double                    m_Tolerance;     // Tolerance used for determining initial causal coefficient
  unsigned int              m_IteratorDirection; // Direction for iterator incrementing


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

  virtual void SetPoles();

  virtual bool DataToCoefficients1D();

  void DataToCoefficientsND();

  virtual void SetInitialCausalCoefficient(double z);

  virtual void SetInitialAntiCausalCoefficient(double z);

  void CopyImageToImage();

  void CopyCoefficientsToScratch( OutputLinearIterator & );

  void CopyScratchToCoefficients( OutputLinearIterator & );
  
};


} // namespace itk

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

#endif

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