itkBSplineScatteredDataPointSetToImageFilter.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 itkBSplineScatteredDataPointSetToImageFilter_h
#define itkBSplineScatteredDataPointSetToImageFilter_h

#include "itkPointSetToImageFilter.h"

#include "itkBSplineKernelFunction.h"
#include "itkCoxDeBoorBSplineKernelFunction.h"
#include "itkVectorContainer.h"

#include "vnl/vnl_matrix.h"

namespace itk
{
template< typename TInputPointSet, typename TOutputImage >
class BSplineScatteredDataPointSetToImageFilter:
  public PointSetToImageFilter< TInputPointSet, TOutputImage >
{
public:
  typedef BSplineScatteredDataPointSetToImageFilter             Self;
  typedef PointSetToImageFilter<TInputPointSet, TOutputImage>   Superclass;
  typedef SmartPointer<Self>                                    Pointer;
  typedef SmartPointer<const Self>                              ConstPointer;

  itkNewMacro( Self );

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

  typedef TOutputImage                              ImageType;
  typedef TInputPointSet                            PointSetType;

  typedef typename ImageType::PixelType             PixelType;
  typedef typename ImageType::RegionType            RegionType;
  typedef typename ImageType::SizeType              SizeType;
  typedef typename ImageType::IndexType             IndexType;

  typedef typename PointSetType::PointType          PointType;
  typedef typename PointSetType::Pointer            PointSetPointer;
  typedef typename PointSetType::PixelType          PointDataType;
  typedef typename PointSetType::PointDataContainer PointDataContainerType;

  typedef float                                     RealType;
  typedef VectorContainer<unsigned, RealType>       WeightsContainerType;

  typedef Image<PointDataType,
    itkGetStaticConstMacro( ImageDimension )>       PointDataImageType;
  typedef Image<RealType,
    itkGetStaticConstMacro( ImageDimension )>       RealImageType;
  typedef typename RealImageType::Pointer           RealImagePointer;
  typedef typename PointDataImageType::Pointer      PointDataImagePointer;
  typedef FixedArray<unsigned,
    itkGetStaticConstMacro( ImageDimension )>       ArrayType;

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

  // Helper functions

  void SetSplineOrder( unsigned int );

  void SetSplineOrder( const ArrayType & );

  itkGetConstReferenceMacro( SplineOrder, ArrayType );

  itkSetMacro( NumberOfControlPoints, ArrayType );

  itkGetConstReferenceMacro( NumberOfControlPoints, ArrayType );

  itkGetConstReferenceMacro( CurrentNumberOfControlPoints, ArrayType );

  void SetNumberOfLevels( unsigned int );

  void SetNumberOfLevels( const ArrayType & );

  itkGetConstReferenceMacro( NumberOfLevels, ArrayType );

  itkSetMacro( CloseDimension, ArrayType );

  itkGetConstReferenceMacro( CloseDimension, ArrayType );

  void SetPointWeights( WeightsContainerType *weights );

  itkSetMacro( GenerateOutputImage, bool );

  itkGetConstReferenceMacro( GenerateOutputImage, bool );

  itkBooleanMacro( GenerateOutputImage );

  PointDataImagePointer GetPhiLattice()
    {
    return static_cast<PointDataImageType *>( this->ProcessObject::GetOutput( 1 ) );
    }

protected:
  BSplineScatteredDataPointSetToImageFilter();
  virtual ~BSplineScatteredDataPointSetToImageFilter();

  void PrintSelf(std::ostream & os, Indent indent) const ITK_OVERRIDE;

  void ThreadedGenerateData( const RegionType &, ThreadIdType ) ITK_OVERRIDE;

  void BeforeThreadedGenerateData() ITK_OVERRIDE;

  void AfterThreadedGenerateData() ITK_OVERRIDE;

  unsigned int SplitRequestedRegion( unsigned int, unsigned int, RegionType & ) ITK_OVERRIDE;

  void GenerateData() ITK_OVERRIDE;

private:

  //purposely not implemented
  BSplineScatteredDataPointSetToImageFilter( const Self & );
  void operator=( const Self & );

  void RefineControlPointLattice();

  void UpdatePointSet();

  void GenerateOutputImage();

  void ThreadedGenerateDataForFitting( const RegionType &, ThreadIdType  );

  void ThreadedGenerateDataForReconstruction( const RegionType &, ThreadIdType  );

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

  void SetPhiLatticeParametricDomainParameters();

  IndexType NumberToIndex( const unsigned int, const SizeType );

  bool                                         m_DoMultilevel;
  bool                                         m_GenerateOutputImage;
  bool                                         m_UsePointWeights;
  unsigned int                                 m_MaximumNumberOfLevels;
  unsigned int                                 m_CurrentLevel;
  ArrayType                                    m_NumberOfControlPoints;
  ArrayType                                    m_CurrentNumberOfControlPoints;
  ArrayType                                    m_CloseDimension;
  ArrayType                                    m_SplineOrder;
  ArrayType                                    m_NumberOfLevels;

  typename WeightsContainerType::Pointer       m_PointWeights;

  typename PointDataImageType::Pointer         m_PhiLattice;
  typename PointDataImageType::Pointer         m_PsiLattice;

  vnl_matrix<RealType>     m_RefinedLatticeCoefficients[ImageDimension];

  typename PointDataContainerType::Pointer     m_InputPointData;
  typename PointDataContainerType::Pointer     m_OutputPointData;

  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;

  std::vector<RealImagePointer>                m_OmegaLatticePerThread;
  std::vector<PointDataImagePointer>           m_DeltaLatticePerThread;

  RealType                                     m_BSplineEpsilon;
  bool                                         m_IsFittingComplete;
};
} // end namespace itk

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

#endif