itkBSplineControlPointImageFilter.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 __itkBSplineControlPointImageFilter_h
#define __itkBSplineControlPointImageFilter_h

#include "itkImageToImageFilter.h"
#include "itkBSplineKernelFunction.h"
#include "itkCoxDeBoorBSplineKernelFunction.h"
#include "itkFixedArray.h"
#include "itkPointSet.h"
#include "itkVariableSizeMatrix.h"
#include "itkVector.h"
#include "itkVectorContainer.h"

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

namespace itk
{

template <typename TInputImage, typename TOutputImage = TInputImage>
class BSplineControlPointImageFilter
  : public ImageToImageFilter<TInputImage, TOutputImage>
{
public:
  typedef BSplineControlPointImageFilter                Self;
  typedef ImageToImageFilter<TInputImage, TOutputImage> Superclass;
  typedef SmartPointer<Self>                            Pointer;
  typedef SmartPointer<const Self>                      ConstPointer;

  itkNewMacro(Self);

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

  typedef TInputImage  ControlPointLatticeType;
  typedef TOutputImage OutputImageType;

  typedef typename OutputImageType::PixelType  PixelType;
  typedef typename OutputImageType::RegionType RegionType;
  typedef typename OutputImageType::IndexType  IndexType;
  typedef typename OutputImageType::PointType  PointType;
  typedef typename OutputImageType::RegionType OutputImageRegionType;

  typedef typename OutputImageType::SpacingType   SpacingType;
  typedef typename OutputImageType::PointType     OriginType;
  typedef typename OutputImageType::SizeType      SizeType;
  typedef typename OutputImageType::DirectionType DirectionType;

  typedef float RealType;
  typedef Image<RealType,
    itkGetStaticConstMacro( ImageDimension )>       RealImageType;
  typedef typename RealImageType::Pointer           RealImagePointer;

  typedef FixedArray<unsigned,
    itkGetStaticConstMacro( ImageDimension )>       ArrayType;

  typedef PointSet<PixelType,
    itkGetStaticConstMacro( ImageDimension )>       PointSetType;
  typedef typename PointSetType::PixelType          PointDataType;
  typedef typename PointSetType::PointDataContainer PointDataContainerType;
  typedef Image<PointDataType,
    itkGetStaticConstMacro( ImageDimension )>       PointDataImageType;
  typedef typename PointDataImageType::Pointer      PointDataImagePointer;

  typedef CoxDeBoorBSplineKernelFunction<3> KernelType;
  typedef BSplineKernelFunction<0>          KernelOrder0Type;
  typedef BSplineKernelFunction<1>          KernelOrder1Type;
  typedef BSplineKernelFunction<2>          KernelOrder2Type;
  typedef BSplineKernelFunction<3>          KernelOrder3Type;

  void SetSplineOrder( unsigned int );

  void SetSplineOrder( ArrayType );

  itkGetConstReferenceMacro( SplineOrder, ArrayType );

  itkSetMacro( CloseDimension, ArrayType );

  itkGetConstReferenceMacro( CloseDimension, ArrayType );

  itkSetMacro( Spacing, SpacingType );

  itkGetConstMacro( Spacing, SpacingType );

  itkSetMacro( Origin, OriginType );

  itkGetConstMacro( Origin, OriginType );

  itkSetMacro( Size, SizeType );

  itkGetConstMacro( Size, SizeType );

  itkSetMacro( Direction, DirectionType );

  itkGetConstMacro( Direction, DirectionType );

  typename ControlPointLatticeType::Pointer
    RefineControlPointLattice( ArrayType );

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

  void ThreadedGenerateData( const OutputImageRegionType &, ThreadIdType );

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


  void BeforeThreadedGenerateData();

  unsigned int SplitRequestedRegion( unsigned int, unsigned int, OutputImageRegionType & );

  void CollapsePhiLattice( PointDataImageType *, PointDataImageType *,
    const RealType, const unsigned int );

  void SetNumberOfLevels( ArrayType );

  SizeType                                     m_Size;
  SpacingType                                  m_Spacing;
  OriginType                                   m_Origin;
  DirectionType                                m_Direction;

  bool                                         m_DoMultilevel;
  unsigned int                                 m_MaximumNumberOfLevels;
  ArrayType                                    m_NumberOfControlPoints;
  ArrayType                                    m_CloseDimension;
  ArrayType                                    m_SplineOrder;
  ArrayType                                    m_NumberOfLevels;

  vnl_matrix<RealType>       m_RefinedLatticeCoefficients[ImageDimension];

  typename KernelType::Pointer                 m_Kernel[ImageDimension];
  typename KernelOrder0Type::Pointer           m_KernelOrder0;
  typename KernelOrder1Type::Pointer           m_KernelOrder1;
  typename KernelOrder2Type::Pointer           m_KernelOrder2;
  typename KernelOrder3Type::Pointer           m_KernelOrder3;

  RealType m_BSplineEpsilon;

  inline typename RealImageType::IndexType
  NumberToIndex( unsigned int number, typename RealImageType::SizeType size )
    {
    typename RealImageType::IndexType k;
    k[0] = 1;

    for ( unsigned int i = 1; i < ImageDimension; i++ )
      {
      k[i] = size[ImageDimension-i-1]*k[i-1];
      }
    typename RealImageType::IndexType index;
    for ( unsigned int i = 0; i < ImageDimension; i++ )
      {
      index[ImageDimension-i-1]
        = static_cast<unsigned int>( number/k[ImageDimension-i-1] );
      number %= k[ImageDimension-i-1];
      }
    return index;
    }

};

} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkBSplineControlPointImageFilter.hxx"
#endif

#endif