/usr/include/ITK-4.9/itkShapePriorSegmentationLevelSetFunction.hxx is in libinsighttoolkit4-dev 4.9.0-4ubuntu1.
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 itkShapePriorSegmentationLevelSetFunction_hxx
#define itkShapePriorSegmentationLevelSetFunction_hxx
#include "itkShapePriorSegmentationLevelSetFunction.h"
#include "itkMath.h"
namespace itk
{
/**
* Constructor
*/
template< typename TImageType, typename TFeatureImageType >
ShapePriorSegmentationLevelSetFunction< TImageType, TFeatureImageType >
::ShapePriorSegmentationLevelSetFunction()
{
m_ShapeFunction = ITK_NULLPTR;
m_ShapePriorWeight = NumericTraits< ScalarValueType >::ZeroValue();
}
/**
* PrintSelf
*/
template< typename TImageType, typename TFeatureImageType >
void
ShapePriorSegmentationLevelSetFunction< TImageType, TFeatureImageType >
::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "ShapeFunction: " << m_ShapeFunction.GetPointer() << std::endl;
os << indent << "ShapePriorWeight: " << m_ShapePriorWeight << std::endl;
}
/**
* Compute the equation value.
*/
template< typename TImageType, typename TFeatureImageType >
typename ShapePriorSegmentationLevelSetFunction< TImageType, TFeatureImageType >
::PixelType
ShapePriorSegmentationLevelSetFunction< TImageType, TFeatureImageType >
::ComputeUpdate(
const NeighborhoodType & neighborhood,
void *gd,
const FloatOffsetType & offset)
{
// Compute the generic level set update using superclass
PixelType value = this->Superclass::ComputeUpdate(neighborhood, gd, offset);
// Add the shape prior term
if ( m_ShapeFunction && Math::NotExactlyEquals(m_ShapePriorWeight, NumericTraits< ScalarValueType >::ZeroValue()) )
{
IndexType idx = neighborhood.GetIndex();
ContinuousIndex< double, ImageDimension > cdx;
for ( unsigned int i = 0; i < ImageDimension; ++i )
{
cdx[i] = static_cast< double >( idx[i] ) - offset[i];
}
typename ShapeFunctionType::PointType point;
this->GetFeatureImage()->TransformContinuousIndexToPhysicalPoint(cdx, point);
ScalarValueType shape_term = m_ShapePriorWeight
* ( m_ShapeFunction->Evaluate(point) - neighborhood.GetCenterPixel() );
value += shape_term;
// collect max change to be used for calculating the time step
ShapePriorGlobalDataStruct *globalData = (ShapePriorGlobalDataStruct *)gd;
globalData->m_MaxShapePriorChange =
vnl_math_max( globalData->m_MaxShapePriorChange, vnl_math_abs(shape_term) );
}
return value;
}
/**
* Compute the global time step.
*/
template< typename TImageType, typename TFeatureImageType >
typename ShapePriorSegmentationLevelSetFunction< TImageType, TFeatureImageType >
::TimeStepType
ShapePriorSegmentationLevelSetFunction< TImageType, TFeatureImageType >
::ComputeGlobalTimeStep(void *gd) const
{
TimeStepType dt;
ShapePriorGlobalDataStruct *d = (ShapePriorGlobalDataStruct *)gd;
d->m_MaxAdvectionChange += d->m_MaxPropagationChange + d->m_MaxShapePriorChange;
if ( vnl_math_abs(d->m_MaxCurvatureChange) > 0.0 )
{
if ( d->m_MaxAdvectionChange > 0.0 )
{
dt = vnl_math_min( ( this->m_WaveDT / d->m_MaxAdvectionChange ),
( this->m_DT / d->m_MaxCurvatureChange ) );
}
else
{
dt = this->m_DT / d->m_MaxCurvatureChange;
}
}
else
{
if ( d->m_MaxAdvectionChange > 0.0 )
{
dt = this->m_WaveDT / d->m_MaxAdvectionChange;
}
else
{
dt = 0.0;
}
}
double maxScaleCoefficient = 0.0;
for ( unsigned int i = 0; i < ImageDimension; i++ )
{
maxScaleCoefficient = vnl_math_max(this->m_ScaleCoefficients[i], maxScaleCoefficient);
}
dt /= maxScaleCoefficient;
// reset the values
d->m_MaxAdvectionChange = 0;
d->m_MaxPropagationChange = 0;
d->m_MaxCurvatureChange = 0;
d->m_MaxShapePriorChange = 0;
return dt;
}
} // end namespace itk
#endif
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