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/*========================================================================= |
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Program: Insight Segmentation & Registration Toolkit |
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Module: $RCSfile: itkBSplineInterpolationWeightFunction.h.html,v $ |
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Language: C++ |
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Date: $Date: 2006/01/17 19:15:33 $ |
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Version: $Revision: 1.4 $ |
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Copyright (c) Insight Software Consortium. All rights reserved. |
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See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details. |
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This software is distributed WITHOUT ANY WARRANTY; without even |
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
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PURPOSE. See the above copyright notices for more information. |
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=========================================================================*/ |
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#ifndef _itkBSplineInterpolationWeightFunction_h |
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#define _itkBSplineInterpolationWeightFunction_h |
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#include "itkFunctionBase.h" |
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#include "itkContinuousIndex.h" |
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#include "itkBSplineKernelFunction.h" |
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#include "itkArray.h" |
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#include "itkArray2D.h" |
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namespace itk |
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{ |
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/** \class BSplineInterpolationWeightFunction |
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* \brief Returns the weights over the support region used for B-spline |
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* interpolation/reconstruction. |
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* |
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* Computes/evaluate the B-spline interpolation weights over the |
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* support region of the B-spline. |
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* |
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* This class is templated over the coordinate representation type, |
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* the space dimension and the spline order. |
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* |
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* \sa Point |
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* \sa Index |
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* \sa ContinuousIndex |
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* |
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* \ingroup Functions ImageInterpolators |
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*/ |
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template < |
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class TCoordRep = float, |
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unsigned int VSpaceDimension = 2, |
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unsigned int VSplineOrder = 3 |
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> |
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class ITK_EXPORT BSplineInterpolationWeightFunction : |
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**public FunctionBase< ContinuousIndex<TCoordRep,VSpaceDimension>, |
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***********************Array<double> > |
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{ |
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public: |
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/** Standard class typedefs. */ |
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typedef BSplineInterpolationWeightFunction Self; |
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typedef FunctionBase< ContinuousIndex<TCoordRep,VSpaceDimension>, |
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TDA,IND |
************Array<double> > Superclass; |
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TDA |
typedef SmartPointer<Self> Pointer; |
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TDA |
typedef SmartPointer<const Self> ConstPointer; |
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/** New macro for creation of through the object factory.*/ |
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itkNewMacro( Self ); |
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/** Run-time type information (and related methods). */ |
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itkTypeMacro(BSplineInterpolationWeightFunction, FunctionBase); |
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/** Space dimension. */ |
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itkStaticConstMacro(SpaceDimension, unsigned int, VSpaceDimension); |
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/** Spline order. */ |
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itkStaticConstMacro(SplineOrder, unsigned int, VSplineOrder); |
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/** OutputType typedef support. */ |
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typedef Array<double> WeightsType; |
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/** Index and size typedef support. */ |
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typedef Index<VSpaceDimension> IndexType; |
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TDA |
typedef Size<VSpaceDimension> SizeType; |
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/** ContinuousIndex typedef support. */ |
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typedef ContinuousIndex<TCoordRep,VSpaceDimension> ContinuousIndexType; |
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/** Evaluate the weights at specified ContinousIndex position. |
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* Subclasses must provide this method. */ |
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virtual WeightsType Evaluate( const ContinuousIndexType & index ) const; |
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/** Evaluate the weights at specified ContinousIndex position. |
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* The weights are returned in the user specified container. |
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* This function assume that weights can hold |
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* (SplineOrder + 1)^(SpaceDimension) elements. For efficiency, |
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* no size checking is done. |
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* On return, startIndex contains the start index of the |
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* support region over which the weights are defined. |
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*/ |
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virtual void Evaluate( const ContinuousIndexType & index, |
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WeightsType & weights, IndexType & startIndex ) const; |
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/** Get support region size. */ |
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itkGetMacro( SupportSize, SizeType ); |
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/** Get number of weights. */ |
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itkGetMacro( NumberOfWeights, unsigned long ); |
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protected: |
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BSplineInterpolationWeightFunction(); |
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~BSplineInterpolationWeightFunction() {} |
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void PrintSelf(std::ostream& os, Indent indent) const; |
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private: |
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BSplineInterpolationWeightFunction(const Self&); //purposely not implemented |
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void operator=(const Self&); //purposely not implemented |
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/** Number of weights. */ |
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unsigned long m_NumberOfWeights; |
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/** Size of support region. */ |
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SizeType m_SupportSize; |
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/** Lookup table type. */ |
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typedef Array2D<unsigned long> TableType; |
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/** Table mapping linear offset to indices. */ |
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TableType m_OffsetToIndexTable; |
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/** Interpolation kernel type. */ |
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typedef BSplineKernelFunction<itkGetStaticConstMacro(SplineOrder)> |
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*****KernelType; |
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/** Interpolation kernel. */ |
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typename KernelType::Pointer m_Kernel; |
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}; |
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} // namespace itk |
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#ifndef ITK_MANUAL_INSTANTIATION |
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#include "itkBSplineInterpolationWeightFunction.txx" |
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#endif |
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#endif |
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