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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 itkBinaryMinMaxCurvatureFlowFunction_hxx
#define itkBinaryMinMaxCurvatureFlowFunction_hxx
#include "itkBinaryMinMaxCurvatureFlowFunction.h"
#include "itkMath.h"
#include "itkNeighborhoodInnerProduct.h"
namespace itk
{
/**
* Constructor
*/
template< typename TImage >
BinaryMinMaxCurvatureFlowFunction< TImage >
::BinaryMinMaxCurvatureFlowFunction()
{
m_Threshold = 0.0;
}
/**
* Update the solution at pixels which does not lie on the
* data boundary.
*/
template< typename TImage >
typename BinaryMinMaxCurvatureFlowFunction< TImage >::PixelType
BinaryMinMaxCurvatureFlowFunction< TImage >
::ComputeUpdate(const NeighborhoodType & it, void *globalData,
const FloatOffsetType & offset)
{
typedef CurvatureFlowFunction< TImage > CurvatureFlowFunctionType;
PixelType update = this->CurvatureFlowFunctionType::ComputeUpdate(
it, globalData, offset);
if ( update == 0.0 )
{
return update;
}
NeighborhoodInnerProduct< ImageType > innerProduct;
PixelType avgValue = innerProduct(it, this->m_StencilOperator);
if ( avgValue < m_Threshold )
{
return ( std::min(update, NumericTraits< PixelType >::ZeroValue()) );
}
else
{
return ( std::max(update, NumericTraits< PixelType >::ZeroValue()) );
}
}
} // end namespace itk
#endif
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