/usr/include/ITK-4.5/itkLevelSetEquationChanAndVeseInternalTerm.hxx 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 __itkLevelSetEquationChanAndVeseInternalTerm_hxx
#define __itkLevelSetEquationChanAndVeseInternalTerm_hxx
#include "itkLevelSetEquationChanAndVeseInternalTerm.h"
namespace itk
{
template< typename TInput, typename TLevelSetContainer >
LevelSetEquationChanAndVeseInternalTerm< TInput, TLevelSetContainer >
::LevelSetEquationChanAndVeseInternalTerm() :
m_Mean( NumericTraits< InputPixelRealType >::Zero ),
m_TotalValue( NumericTraits< InputPixelRealType >::Zero ),
m_TotalH( NumericTraits< LevelSetOutputRealType >::Zero )
{
this->m_TermName = "Internal Chan And Vese term";
this->m_RequiredData.insert( "Value" );
}
template< typename TInput, typename TLevelSetContainer >
LevelSetEquationChanAndVeseInternalTerm< TInput, TLevelSetContainer >
::~LevelSetEquationChanAndVeseInternalTerm()
{
}
template< typename TInput, typename TLevelSetContainer >
void LevelSetEquationChanAndVeseInternalTerm< TInput, TLevelSetContainer >
::Update()
{
if( this->m_TotalH > NumericTraits< LevelSetOutputRealType >::epsilon() )
{
const LevelSetOutputRealType inv_total_h = 1. / this->m_TotalH;
// depending on the pixel type, it may be more efficient to do
// a multiplication than to do a division
this->m_Mean = this->m_TotalValue * inv_total_h;
}
else
{
this->m_Mean = NumericTraits< InputPixelRealType >::Zero;
}
}
template< typename TInput, typename TLevelSetContainer >
void LevelSetEquationChanAndVeseInternalTerm< TInput, TLevelSetContainer >
::InitializeParameters()
{
this->m_TotalValue = NumericTraits< InputPixelRealType >::Zero;
this->m_TotalH = NumericTraits< LevelSetOutputRealType >::Zero;
this->SetUp();
}
template< typename TInput, typename TLevelSetContainer >
void LevelSetEquationChanAndVeseInternalTerm< TInput, TLevelSetContainer >
::Initialize( const LevelSetInputIndexType& inputIndex )
{
if( this->m_Heaviside.IsNotNull() )
{
InputPixelType pixel = this->m_Input->GetPixel( inputIndex );
LevelSetOutputRealType prod;
this->ComputeProduct( inputIndex, prod );
this->Accumulate( pixel, prod );
}
else
{
itkWarningMacro( << "m_Heaviside is NULL" );
}
}
template< typename TInput, typename TLevelSetContainer >
void LevelSetEquationChanAndVeseInternalTerm< TInput, TLevelSetContainer >
::ComputeProduct( const LevelSetInputIndexType& inputIndex, LevelSetOutputRealType& prod )
{
LevelSetOutputRealType value = this->m_CurrentLevelSetPointer->Evaluate( inputIndex );
prod = this->m_Heaviside->Evaluate( -value );
}
template< typename TInput, typename TLevelSetContainer >
void LevelSetEquationChanAndVeseInternalTerm< TInput, TLevelSetContainer >
::UpdatePixel( const LevelSetInputIndexType& inputIndex,
const LevelSetOutputRealType & oldValue,
const LevelSetOutputRealType & newValue )
{
// For each affected h val: h val = new hval (this will dirty some cvals)
InputPixelType input = this->m_Input->GetPixel( inputIndex );
const LevelSetOutputRealType oldH = this->m_Heaviside->Evaluate( -oldValue );
const LevelSetOutputRealType newH = this->m_Heaviside->Evaluate( -newValue );
const LevelSetOutputRealType change = newH - oldH;
// update the foreground constant for current level-set function
this->m_TotalH += change;
this->m_TotalValue += input * change;
}
template< typename TInput, typename TLevelSetContainer >
typename LevelSetEquationChanAndVeseInternalTerm< TInput, TLevelSetContainer >::LevelSetOutputRealType
LevelSetEquationChanAndVeseInternalTerm< TInput, TLevelSetContainer >
::Value( const LevelSetInputIndexType& inputIndex )
{
if( this->m_Heaviside.IsNotNull() )
{
const LevelSetOutputRealType value =
static_cast< LevelSetOutputRealType >( this->m_CurrentLevelSetPointer->Evaluate( inputIndex ) );
const LevelSetOutputRealType d_val = this->m_Heaviside->EvaluateDerivative( -value );
const InputPixelType pixel = this->m_Input->GetPixel( inputIndex );
LevelSetOutputRealType prod = 1;
this->ComputeProductTerm( inputIndex, prod );
const LevelSetOutputRealType oValue = d_val * prod *
static_cast< LevelSetOutputRealType >( ( pixel - this->m_Mean ) * ( pixel - this->m_Mean ) );
return oValue;
}
else
{
itkWarningMacro( << "m_Heaviside is NULL" );
}
return NumericTraits< LevelSetOutputPixelType >::Zero;
}
template< typename TInput, typename TLevelSetContainer >
typename LevelSetEquationChanAndVeseInternalTerm< TInput, TLevelSetContainer >::LevelSetOutputRealType
LevelSetEquationChanAndVeseInternalTerm< TInput, TLevelSetContainer >
::Value( const LevelSetInputIndexType& inputIndex, const LevelSetDataType& data )
{
if( this->m_Heaviside.IsNotNull() )
{
const LevelSetOutputRealType value = data.Value.m_Value;
const LevelSetOutputRealType d_val = this->m_Heaviside->EvaluateDerivative( -value );
const InputPixelType pixel = this->m_Input->GetPixel( inputIndex );
LevelSetOutputRealType prod = 1;
this->ComputeProductTerm( inputIndex, prod );
const LevelSetOutputRealType oValue = d_val * prod *
static_cast< LevelSetOutputRealType >( ( pixel - this->m_Mean ) * ( pixel - this->m_Mean ) );
return oValue;
}
else
{
itkWarningMacro( << "m_Heaviside is NULL" );
}
return NumericTraits< LevelSetOutputPixelType >::Zero;
}
template< typename TInput, typename TLevelSetContainer >
void LevelSetEquationChanAndVeseInternalTerm< TInput, TLevelSetContainer >
::Accumulate( const InputPixelType& inputPixel, const LevelSetOutputRealType& heavisideValue )
{
this->m_TotalValue += static_cast< InputPixelRealType >( inputPixel ) *
static_cast< LevelSetOutputRealType >( heavisideValue );
this->m_TotalH += static_cast< LevelSetOutputRealType >( heavisideValue );
}
}
#endif
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