itkSymmetricSigmoidTransferFunction.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 __itkSymmetricSigmoidTransferFunction_h
#define __itkSymmetricSigmoidTransferFunction_h

#include "itkTransferFunctionBase.h"

namespace itk
{
namespace Statistics
{
template<typename ScalarType>
class SymmetricSigmoidTransferFunction : public TransferFunctionBase<ScalarType>
{
public:

  typedef SymmetricSigmoidTransferFunction Self;
  typedef TransferFunctionBase<ScalarType> Superclass;
  typedef SmartPointer<Self>               Pointer;
  typedef SmartPointer<const Self>         ConstPointer;

  itkTypeMacro(SymmetricSigmoidTransferFunction, TransferFunctionBase);

  itkNewMacro(Self);

  virtual ScalarType Evaluate(const ScalarType& input) const;

  virtual ScalarType EvaluateDerivative(const ScalarType& input) const;

protected:

  SymmetricSigmoidTransferFunction();
  virtual ~SymmetricSigmoidTransferFunction();

  ScalarType m_Range;
  ScalarType m_Offset;

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

} // end namespace Statistics
} // end namespace itk

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


#endif