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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkMeanShiftModeCacheMethod.txx,v $
Language: C++
Date: $Date: 2009-03-04 15:24:00 $
Version: $Revision: 1.5 $
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef __itkMeanShiftModeCacheMethod_txx
#define __itkMeanShiftModeCacheMethod_txx
namespace itk {
namespace Statistics {
template< class TMeasurementVector >
MeanShiftModeCacheMethod< TMeasurementVector >
::MeanShiftModeCacheMethod()
{
m_MaximumEntries = 200;
m_MaximumConsecutiveFailures = 5;
m_HitRatioThreshold = 0.75;
m_HitsSuccess = 0;
m_NumberOfRequests = 0;
m_ConsecutiveFailures = 0;
m_TotalHitsSuccess = 0;
m_TotalHitsFailure = 0;
m_TotalTableSize = 0;
m_TimesOfRebuilding = 0;
m_TimesOfRebuildingByHitRatio = 0;
m_TimesOfRebuildingByConsecutiveFailures = 0;
}
template< class TMeasurementVector >
MeanShiftModeCacheMethod< TMeasurementVector >
::~MeanShiftModeCacheMethod()
{
}
template< class TMeasurementVector >
void
MeanShiftModeCacheMethod< TMeasurementVector >
::PrintSelf(std::ostream& os, Indent indent) const
{
Superclass::PrintSelf(os,indent);
os << indent << "Maximum entries: " << m_MaximumEntries << std::endl;
os << indent << "Maximum consecutive failures: "
<< m_MaximumConsecutiveFailures << std::endl;
os << indent << "Hit ratio threshold: "
<< m_HitRatioThreshold << std::endl;
os << indent << "Last consecutive failures: "
<< m_ConsecutiveFailures << std::endl;
os << indent << "Last successful hits: "
<< m_HitsSuccess << std::endl;
os << indent << "Last number of requests: "
<< m_NumberOfRequests << std::endl;
os << indent << "Total successful hits: " << m_TotalHitsSuccess << std::endl;
os << indent << "Total failed hits: " << m_TotalHitsFailure << std::endl;
os << indent << "Total table size before destuction: "
<< m_TotalTableSize << std::endl;
os << indent << "Number of cache rebuildings: "
<< m_TimesOfRebuilding << std::endl;
os << indent << "Average cache table size: ";
if ( m_TimesOfRebuilding > 0 )
{
os << (float)(m_TotalTableSize / m_TimesOfRebuilding) << std::endl;
}
else
{
os << m_TotalTableSize << std::endl;
}
os << indent << "Number of cache rebuildings caused by hit ratio threshold: "
<< m_TimesOfRebuildingByHitRatio << std::endl;
os << indent << "Number of cache rebuildings caused by consecutive failures: "
<< m_TimesOfRebuildingByConsecutiveFailures << std::endl;
os << indent << "Cache table: " << &m_CacheTable << std::endl;
}
template< class TMeasurementVector >
bool
MeanShiftModeCacheMethod< TMeasurementVector >
::SetMeasurementVector(MeasurementVectorType& source,
MeasurementVectorType& target)
{
MeasurementVectorTraits::Assert( source,
MeasurementVectorTraits::GetLength(target),
"MeanShiftModeCacheMethod::SetMeasurementVector Map container must be used with MeasurementVectors of the same size." );
if ( this->IsFull() )
{
return false;
}
else
{
m_CacheTable[source] = target;
return true;
}
}
template< class TMeasurementVector >
bool
MeanShiftModeCacheMethod< TMeasurementVector >
::GetMeasurementVector(MeasurementVectorType& source,
MeasurementVectorType& target)
{
typename CacheTableType::iterator iter = m_CacheTable.find( source );
++m_NumberOfRequests;
if ( iter != m_CacheTable.end() )
{
target = iter->second;
++m_HitsSuccess;
++m_TotalHitsSuccess;
m_ConsecutiveFailures = 0;
return true;
}
else
{
++m_TotalHitsFailure;
if ( this->IsFull() )
{
++m_ConsecutiveFailures;
if ( float(m_HitsSuccess / m_NumberOfRequests) < m_HitRatioThreshold )
{
++m_TimesOfRebuildingByHitRatio;
this->DestroyCacheTable();
return false;
}
if ( m_ConsecutiveFailures > m_MaximumConsecutiveFailures )
{
++m_TimesOfRebuildingByConsecutiveFailures;
this->DestroyCacheTable();
return false;
}
}
return false;
}
}
template< class TMeasurementVector >
bool
MeanShiftModeCacheMethod< TMeasurementVector >
::IsFull()
{
if ( m_CacheTable.size() < m_MaximumEntries )
{
return false;
}
else
{
return true;
}
}
template< class TMeasurementVector >
void
MeanShiftModeCacheMethod< TMeasurementVector >
::DestroyCacheTable()
{
++m_TimesOfRebuilding;
m_TotalTableSize += m_CacheTable.size();
m_NumberOfRequests = 0;
m_HitsSuccess = 0;
m_ConsecutiveFailures = 0;
m_CacheTable.clear();
}
} // end of namespace Statistics
} // end of namespace itk
#endif
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