/usr/include/ITK-4.5/itkJointHistogramMutualInformationComputeJointPDFThreaderBase.hxx is in libinsighttoolkit4-dev 4.5.0-3.
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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 __itkJointHistogramMutualInformationComputeJointPDFThreaderBase_hxx
#define __itkJointHistogramMutualInformationComputeJointPDFThreaderBase_hxx
#include "itkJointHistogramMutualInformationComputeJointPDFThreaderBase.h"
#include "itkImageRegionIterator.h"
namespace itk
{
template< typename TDomainPartitioner, typename TJointHistogramMetric >
JointHistogramMutualInformationComputeJointPDFThreaderBase< TDomainPartitioner, TJointHistogramMetric >
::JointHistogramMutualInformationComputeJointPDFThreaderBase():
m_JointHistogramMIPerThreadVariables( NULL )
{
}
template< typename TDomainPartitioner, typename TJointHistogramMetric >
JointHistogramMutualInformationComputeJointPDFThreaderBase< TDomainPartitioner, TJointHistogramMetric >
::~JointHistogramMutualInformationComputeJointPDFThreaderBase()
{
delete[] this->m_JointHistogramMIPerThreadVariables;
}
template< typename TDomainPartitioner, typename TJointHistogramMetric >
void
JointHistogramMutualInformationComputeJointPDFThreaderBase< TDomainPartitioner, TJointHistogramMetric >
::BeforeThreadedExecution()
{
delete[] this->m_JointHistogramMIPerThreadVariables;
this->m_JointHistogramMIPerThreadVariables = new AlignedJointHistogramMIPerThreadStruct[ this->GetNumberOfThreadsUsed() ];
for( ThreadIdType i = 0; i < this->GetNumberOfThreadsUsed(); ++i )
{
if( this->m_JointHistogramMIPerThreadVariables[i].JointHistogram.IsNull() )
{
this->m_JointHistogramMIPerThreadVariables[i].JointHistogram = JointHistogramType::New();
}
this->m_JointHistogramMIPerThreadVariables[i].JointHistogram->CopyInformation( this->m_Associate->m_JointPDF );
this->m_JointHistogramMIPerThreadVariables[i].JointHistogram->SetRegions( this->m_Associate->m_JointPDF->GetLargestPossibleRegion() );
this->m_JointHistogramMIPerThreadVariables[i].JointHistogram->Allocate();
this->m_JointHistogramMIPerThreadVariables[i].JointHistogram->FillBuffer( NumericTraits< SizeValueType >::Zero );
this->m_JointHistogramMIPerThreadVariables[i].JointHistogramCount = NumericTraits< SizeValueType >::Zero;
}
}
template< typename TDomainPartitioner, typename TJointHistogramMetric >
void
JointHistogramMutualInformationComputeJointPDFThreaderBase< TDomainPartitioner, TJointHistogramMetric >
::ProcessPoint( const VirtualIndexType & itkNotUsed(virtualIndex),
const VirtualPointType & virtualPoint,
const ThreadIdType threadId )
{
typename AssociateType::Superclass::FixedImagePointType mappedFixedPoint;
typename AssociateType::Superclass::FixedImagePixelType fixedImageValue;
typename AssociateType::Superclass::FixedImageGradientType fixedImageGradients;
typename AssociateType::Superclass::MovingImagePointType mappedMovingPoint;
typename AssociateType::Superclass::MovingImagePixelType movingImageValue;
typename AssociateType::Superclass::MovingImageGradientType movingImageGradients;
bool pointIsValid = false;
try
{
pointIsValid = this->m_Associate->TransformAndEvaluateFixedPoint( virtualPoint, mappedFixedPoint, fixedImageValue );
if( pointIsValid )
{
pointIsValid = this->m_Associate->TransformAndEvaluateMovingPoint( virtualPoint, mappedMovingPoint, movingImageValue );
}
}
catch( ExceptionObject & exc )
{
//NOTE: there must be a cleaner way to do this:
std::string msg("Caught exception: \n");
msg += exc.what();
ExceptionObject err(__FILE__, __LINE__, msg);
throw err;
}
/** Add the paired intensity points to the joint histogram */
if( pointIsValid )
{
JointPDFPointType jointPDFpoint;
this->m_Associate->ComputeJointPDFPoint( fixedImageValue, movingImageValue, jointPDFpoint );
JointPDFIndexType jointPDFIndex;
this->m_JointHistogramMIPerThreadVariables[threadId].JointHistogram->TransformPhysicalPointToIndex( jointPDFpoint, jointPDFIndex );
if( this->m_JointHistogramMIPerThreadVariables[threadId].JointHistogram->GetBufferedRegion().IsInside( jointPDFIndex ) )
{
typename JointHistogramType::PixelType jointHistogramPixel;
jointHistogramPixel = this->m_JointHistogramMIPerThreadVariables[threadId].JointHistogram->GetPixel( jointPDFIndex );
jointHistogramPixel++;
this->m_JointHistogramMIPerThreadVariables[threadId].JointHistogram->SetPixel( jointPDFIndex, jointHistogramPixel );
this->m_JointHistogramMIPerThreadVariables[threadId].JointHistogramCount++;
}
}
}
template< typename TDomainPartitioner, typename TJointHistogramMetric >
void
JointHistogramMutualInformationComputeJointPDFThreaderBase< TDomainPartitioner, TJointHistogramMetric >
::AfterThreadedExecution()
{
const ThreadIdType numberOfThreadsUsed = this->GetNumberOfThreadsUsed();
typedef typename JointHistogramType::PixelType JointHistogramPixelType;
this->m_Associate->m_JointHistogramTotalCount = NumericTraits<SizeValueType>::Zero;
for( ThreadIdType i = 0; i < numberOfThreadsUsed; ++i )
{
this->m_Associate->m_JointHistogramTotalCount += this->m_JointHistogramMIPerThreadVariables[i].JointHistogramCount;
}
if( this->m_Associate->m_JointHistogramTotalCount == 0 )
{
this->m_Associate->m_JointPDF->FillBuffer( NumericTraits< SizeValueType >::Zero );
return;
}
typedef ImageRegionIterator< JointPDFType > JointPDFIteratorType;
JointPDFIteratorType jointPDFIt( this->m_Associate->m_JointPDF, this->m_Associate->m_JointPDF->GetBufferedRegion() );
jointPDFIt.GoToBegin();
typedef ImageRegionConstIterator< JointHistogramType > JointHistogramIteratorType;
std::vector< JointHistogramIteratorType > jointHistogramPerThreadIts;
for( ThreadIdType i = 0; i < numberOfThreadsUsed; ++i )
{
jointHistogramPerThreadIts.push_back( JointHistogramIteratorType( this->m_JointHistogramMIPerThreadVariables[i].JointHistogram,
this->m_JointHistogramMIPerThreadVariables[i].JointHistogram->GetBufferedRegion() ) );
jointHistogramPerThreadIts[i].GoToBegin();
}
JointHistogramPixelType jointHistogramPixel;
while( !jointPDFIt.IsAtEnd() )
{
jointHistogramPixel = NumericTraits< JointHistogramPixelType >::Zero;
for( ThreadIdType i = 0; i < numberOfThreadsUsed; ++i )
{
jointHistogramPixel += jointHistogramPerThreadIts[i].Get();
++jointHistogramPerThreadIts[i];
}
jointPDFIt.Set( static_cast< JointPDFValueType >( jointHistogramPixel ) / static_cast< JointPDFValueType >( this->m_Associate->m_JointHistogramTotalCount ) );
++jointPDFIt;
}
}
} // end namespace itk
#endif
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