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/*=========================================================================
*
* Copyright NumFOCUS
*
* 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
*
* https://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 itkLevelSetEvolutionUpdateLevelSetsThreader_hxx
#define itkLevelSetEvolutionUpdateLevelSetsThreader_hxx
#include "itkImageRegionIterator.h"
namespace itk
{
template <typename TImage, typename TLevelSetEvolution>
void
LevelSetEvolutionUpdateLevelSetsThreader<LevelSetDenseImage<TImage>,
ThreadedImageRegionPartitioner<TImage::ImageDimension>,
TLevelSetEvolution>::BeforeThreadedExecution()
{
this->m_RMSChangeAccumulatorPerThread.resize(this->GetNumberOfWorkUnitsUsed());
for (ThreadIdType ii = 0, maxThreads = this->GetNumberOfWorkUnitsUsed(); ii < maxThreads; ++ii)
{
this->m_RMSChangeAccumulatorPerThread[ii].ResetToZero();
}
}
template <typename TImage, typename TLevelSetEvolution>
void
LevelSetEvolutionUpdateLevelSetsThreader<LevelSetDenseImage<TImage>,
ThreadedImageRegionPartitioner<TImage::ImageDimension>,
TLevelSetEvolution>::ThreadedExecution(const DomainType & imageSubRegion,
const ThreadIdType threadId)
{
typename LevelSetContainerType::Iterator levelSetContainerIt =
this->m_Associate->m_LevelSetContainerIteratorToProcessWhenThreading;
typename LevelSetContainerType::ConstIterator levelSetUpdateContainerIt =
this->m_Associate->m_LevelSetUpdateContainerIteratorToProcessWhenThreading;
// This is for single level set analysis, so we only process the first level
// set.
typename LevelSetType::Pointer levelSet = levelSetContainerIt->GetLevelSet();
typename LevelSetType::Pointer levelSetUpdate = levelSetUpdateContainerIt->GetLevelSet();
typename LevelSetImageType::Pointer levelSetImage = levelSet->GetModifiableImage();
typename LevelSetImageType::ConstPointer levelSetUpdateImage = levelSetUpdate->GetImage();
ImageRegionIterator<LevelSetImageType> levelSetImageIt(levelSetImage, imageSubRegion);
ImageRegionConstIterator<LevelSetImageType> levelSetUpdateImageIt(levelSetUpdateImage, imageSubRegion);
levelSetImageIt.GoToBegin();
levelSetUpdateImageIt.GoToBegin();
while (!levelSetImageIt.IsAtEnd())
{
const LevelSetOutputRealType & p = this->m_Associate->m_Dt * levelSetUpdateImageIt.Get();
levelSetImageIt.Set(levelSetImageIt.Get() + p);
this->m_RMSChangeAccumulatorPerThread[threadId] += p * p;
++levelSetImageIt;
++levelSetUpdateImageIt;
}
}
template <typename TImage, typename TLevelSetEvolution>
void
LevelSetEvolutionUpdateLevelSetsThreader<LevelSetDenseImage<TImage>,
ThreadedImageRegionPartitioner<TImage::ImageDimension>,
TLevelSetEvolution>::AfterThreadedExecution()
{
for (ThreadIdType ii = 0, maxThreads = this->GetNumberOfWorkUnitsUsed(); ii < maxThreads; ++ii)
{
this->m_Associate->m_RMSChangeAccumulator += this->m_RMSChangeAccumulatorPerThread[ii].GetSum();
}
}
} // end namespace itk
#endif
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