/usr/include/ITK-4.5/itkHeavisideStepFunction.h is in libinsighttoolkit4-dev 4.5.0-3.
This file is owned by root:root, with mode 0o644.
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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 __itkHeavisideStepFunction_h
#define __itkHeavisideStepFunction_h
#include "itkHeavisideStepFunctionBase.h"
#include "itkNumericTraits.h"
namespace itk
{
/** \class HeavisideStepFunction
*
* \brief Implementation of the classical Heaviside step function.
*
* The Heaviside Step function is a piece-wise function:
*
* http://en.wikipedia.org/wiki/Heaviside_step_function
*
*
* \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
*
*
* \ingroup ITKCommon
*/
template< typename TInput = float, typename TOutput = double >
class HeavisideStepFunction:
public HeavisideStepFunctionBase< TInput, TOutput >
{
public:
typedef HeavisideStepFunction Self;
typedef HeavisideStepFunctionBase< TInput, TOutput > Superclass;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
itkNewMacro(Self);
itkTypeMacro(HeavisideStepFunction, HeavisideStepFunctionBase);
typedef typename Superclass::InputType InputType;
typedef typename Superclass::OutputType OutputType;
/** Evaluate at the specified input position */
OutputType Evaluate(const InputType & input) const;
/** Evaluate the derivative at the specified input position */
OutputType EvaluateDerivative(const InputType & input) const;
protected:
HeavisideStepFunction();
~HeavisideStepFunction();
private:
HeavisideStepFunction(const Self &); //purposely not implemented
void operator=(const Self &); //purposely not implemented
};
}
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkHeavisideStepFunction.hxx"
#endif
#endif
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