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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 itkGaussianTransferFunction_hxx
#define itkGaussianTransferFunction_hxx
#include "itkGaussianTransferFunction.h"
namespace itk
{
namespace Statistics
{
/** Constructor */
template<typename ScalarType>
GaussianTransferFunction<ScalarType>
::GaussianTransferFunction()
{
}
/** Destructor */
template<typename ScalarType>
GaussianTransferFunction<ScalarType>
::~GaussianTransferFunction()
{
}
/** Evaluate function */
template<typename ScalarType>
ScalarType
GaussianTransferFunction<ScalarType>
::Evaluate(const ScalarType& input) const
{
return static_cast<ScalarType>((std::exp(-1 * input * input)));
}
/** Evaluate derivatives function */
template<typename ScalarType>
ScalarType
GaussianTransferFunction<ScalarType>
::EvaluateDerivative(const ScalarType& input) const
{
return static_cast<ScalarType>(-2 * Evaluate(input) * input);
}
/** Print the object */
template<typename ScalarType>
void
GaussianTransferFunction<ScalarType>
::PrintSelf( std::ostream& os, Indent indent ) const
{
os << indent << "GaussianTransferFunction(" << this << ")" << std::endl;
Superclass::PrintSelf( os, indent );
}
} // end namespace Statistics
} // end namespace itk
#endif
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