/usr/include/InsightToolkit/Review/itkRegularizedHeavisideStepFunction.h is in libinsighttoolkit3-dev 3.20.1+git20120521-6build1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 | /*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkRegularizedHeavisideStepFunction.h
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.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 __itkRegularizedHeavisideStepFunction_h
#define __itkRegularizedHeavisideStepFunction_h
#include "itkHeavisideStepFunctionBase.h"
#include "itkNumericTraits.h"
#include "vnl/vnl_math.h"
namespace itk
{
/** \class RegularizedHeavisideStepFunction
*
* \brief Base class of the Regularized (smoothed) Heaviside functions.
*
* \author Mosaliganti K., Smith B., Gelas A., Gouaillard A., Megason S.
*
* This code was taken from the Insight Journal paper:
*
* "Cell Tracking using Coupled Active Surfaces for Nuclei and Membranes"
* http://www.insight-journal.org/browse/publication/642
* http://hdl.handle.net/10380/3055
*
* That is based on the papers:
*
* "Level Set Segmentation: Active Contours without edge"
* http://www.insight-journal.org/browse/publication/322
* http://hdl.handle.net/1926/1532
*
* and
*
* "Level set segmentation using coupled active surfaces"
* http://www.insight-journal.org/browse/publication/323
* http://hdl.handle.net/1926/1533
*
*
*/
template< class TInput = float, class TOutput = double >
class RegularizedHeavisideStepFunction : public HeavisideStepFunctionBase< TInput, TOutput >
{
public:
typedef RegularizedHeavisideStepFunction Self;
typedef HeavisideStepFunctionBase< TInput, TOutput > Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
typedef typename Superclass::InputType InputType;
typedef typename Superclass::OutputType OutputType;
typedef typename NumericTraits< InputType >::RealType RealType;
/** Evaluate at the specified input position */
virtual OutputType Evaluate( const InputType& input ) const = 0;
/** Evaluate the derivative at the specified input position */
virtual OutputType EvaluateDerivative( const InputType& input ) const = 0;
void SetEpsilon( const RealType & ieps )
{
this->m_Epsilon = ieps;
if ( ieps > vnl_math::eps )
{
m_OneOverEpsilon = 1.0 / ieps;
}
else
{
itkGenericExceptionMacro("ERROR: Epsilon needs to be greater than " << vnl_math::eps );
}
}
RealType GetEpsilon() const
{
return this->m_Epsilon;
}
RealType GetOneOverEpsilon() const
{
return this->m_OneOverEpsilon;
}
protected:
RegularizedHeavisideStepFunction()
{
this->m_Epsilon = 1.0;
this->m_OneOverEpsilon = 1.0;
}
virtual ~RegularizedHeavisideStepFunction() {}
private:
RegularizedHeavisideStepFunction(const Self& ); //purposely not implemented
void operator=(const Self& ); //purposely not implemented
RealType m_Epsilon;
RealType m_OneOverEpsilon;
};
}
#endif
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