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/*========================================================================= |
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Program: Insight Segmentation & Registration Toolkit |
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Module: $RCSfile: itkBSplineDerivativeKernelFunction.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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DEF |
#ifndef _itkBSplineDerivativeKernelFunction_h |
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DEF |
#define _itkBSplineDerivativeKernelFunction_h |
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#include "itkKernelFunction.h" |
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#include "itkBSplineKernelFunction.h" |
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namespace itk |
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{ |
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/** \class BSplineDerivativeKernelFunction |
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* \brief Derivative of a BSpline kernel used for density estimation and |
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* nonparameteric regression. |
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* |
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* This class enscapsulates the derivative of a BSpline kernel for |
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* density estimation or nonparameteric regression. |
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* See documentation for KernelFunction for more details. |
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* |
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* This class is templated over the spline order. |
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* \warning Evaluate is only implemented for spline order 1 to 4 |
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* |
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* \sa KernelFunction |
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* |
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* \ingroup Functions |
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*/ |
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template <unsigned int VSplineOrder = 3> |
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class ITK_EXPORT BSplineDerivativeKernelFunction : public KernelFunction |
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{ |
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public: |
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/** Standard class typedefs. */ |
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typedef BSplineDerivativeKernelFunction Self; |
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TDA |
typedef KernelFunction Superclass; |
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TDA |
typedef SmartPointer<Self> Pointer; |
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/** Method for creation 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(BSplineDerivativeKernelFunction, KernelFunction); |
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/** Enum of for spline order. */ |
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itkStaticConstMacro(SplineOrder, unsigned int, VSplineOrder); |
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/** Evaluate the function. */ |
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inline double Evaluate( const double & u ) const |
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{ |
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return ( m_KernelFunction->Evaluate( u + 0.5 ) - |
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******m_KernelFunction->Evaluate( u - 0.5 ) ); |
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} |
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protected: |
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typedef BSplineKernelFunction<itkGetStaticConstMacro(SplineOrder) - 1> |
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******KernelType; |
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BSplineDerivativeKernelFunction() |
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{ |
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m_KernelFunction = KernelType::New(); |
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}; |
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~BSplineDerivativeKernelFunction(){}; |
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void PrintSelf(std::ostream& os, Indent indent) const |
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{ |
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Superclass::PrintSelf( os, indent ); |
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os << indent << "Spline Order: " << SplineOrder << std::endl; |
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} |
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private: |
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BSplineDerivativeKernelFunction(const Self&); //purposely not implemented |
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void operator=(const Self&); //purposely not implemented |
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typename KernelType::Pointer m_KernelFunction; |
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}; |
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EML |
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} // namespace itk |
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#endif |
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