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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 itkLabelMapToBinaryImageFilter_hxx
#define itkLabelMapToBinaryImageFilter_hxx
#include "itkLabelMapToBinaryImageFilter.h"
#include "itkNumericTraits.h"
#include "itkProgressReporter.h"
#include "itkImageRegionIterator.h"
namespace itk
{
template< typename TInputImage, typename TOutputImage >
LabelMapToBinaryImageFilter< TInputImage, TOutputImage >
::LabelMapToBinaryImageFilter()
{
this->m_BackgroundValue = NumericTraits< OutputImagePixelType >::NonpositiveMin();
this->m_ForegroundValue = NumericTraits< OutputImagePixelType >::max();
}
template< typename TInputImage, typename TOutputImage >
void
LabelMapToBinaryImageFilter< TInputImage, TOutputImage >
::GenerateInputRequestedRegion()
{
// call the superclass' implementation of this method
Superclass::GenerateInputRequestedRegion();
// We need all the input.
InputImagePointer input = const_cast< InputImageType * >( this->GetInput() );
if ( input )
{
input->SetRequestedRegion( input->GetLargestPossibleRegion() );
}
}
template< typename TInputImage, typename TOutputImage >
void
LabelMapToBinaryImageFilter< TInputImage, TOutputImage >
::EnlargeOutputRequestedRegion(DataObject *)
{
this->GetOutput()->SetRequestedRegion( this->GetOutput()->GetLargestPossibleRegion() );
}
template< typename TInputImage, typename TOutputImage >
void
LabelMapToBinaryImageFilter< TInputImage, TOutputImage >
::BeforeThreadedGenerateData()
{
ThreadIdType numberOfThreads = this->GetNumberOfThreads();
if ( itk::MultiThreader::GetGlobalMaximumNumberOfThreads() != 0 )
{
numberOfThreads = std::min(
this->GetNumberOfThreads(), itk::MultiThreader::GetGlobalMaximumNumberOfThreads() );
}
// number of threads can be constrained by the region size, so call the
// SplitRequestedRegion to get the real number of threads which will be used
typename TOutputImage::RegionType splitRegion; // dummy region - just to call
// the following method
numberOfThreads = this->SplitRequestedRegion(0, numberOfThreads, splitRegion);
m_Barrier = Barrier::New();
m_Barrier->Initialize(numberOfThreads);
this->Superclass::BeforeThreadedGenerateData();
}
template< typename TInputImage, typename TOutputImage >
void
LabelMapToBinaryImageFilter< TInputImage, TOutputImage >
::ThreadedGenerateData(const OutputImageRegionType & outputRegionForThread, ThreadIdType threadId)
{
OutputImageType *output = this->GetOutput();
// fill the output with background value - they will be overridden with the
// foreground value later, if there is some objects
if ( this->GetNumberOfIndexedInputs() == 2 )
{
// fill the background with the background values from the background image
ImageRegionConstIterator< OutputImageType > bgIt(this->GetBackgroundImage(), outputRegionForThread);
ImageRegionIterator< OutputImageType > oIt(output, outputRegionForThread);
bgIt.GoToBegin();
oIt.GoToBegin();
while ( !oIt.IsAtEnd() )
{
const OutputImagePixelType & bg = bgIt.Get();
if ( bg != this->m_ForegroundValue )
{
oIt.Set(bg);
}
else
{
oIt.Set(this->m_BackgroundValue);
}
++oIt;
++bgIt;
}
}
else
{
// fill the background with the background value
ImageRegionIterator< OutputImageType > oIt(output, outputRegionForThread);
oIt.GoToBegin();
while ( !oIt.IsAtEnd() )
{
oIt.Set(this->m_BackgroundValue);
++oIt;
}
}
// wait for the other threads to complete that part
this->m_Barrier->Wait();
// and delegate to the superclass implementation to use the thread support for
// the label objects
this->Superclass::ThreadedGenerateData(outputRegionForThread, threadId);
}
template< typename TInputImage, typename TOutputImage >
void
LabelMapToBinaryImageFilter< TInputImage, TOutputImage >
::ThreadedProcessLabelObject(LabelObjectType *labelObject)
{
OutputImageType *output = this->GetOutput();
typename LabelObjectType::ConstIndexIterator it( labelObject );
while( ! it.IsAtEnd() )
{
output->SetPixel( it.GetIndex(), this->m_ForegroundValue );
++it;
}
}
template< typename TInputImage, typename TOutputImage >
void
LabelMapToBinaryImageFilter< TInputImage, TOutputImage >
::PrintSelf(std::ostream & os, Indent indent) const
{
this->Superclass::PrintSelf(os, indent);
os << indent << "ForegroundValue: "
<< static_cast< typename NumericTraits< OutputImagePixelType >::PrintType >( this->m_ForegroundValue )
<< std::endl;
os << indent << "BackgroundValue: "
<< static_cast< typename NumericTraits< OutputImagePixelType >::PrintType >( this->m_BackgroundValue )
<< std::endl;
os << indent << "Barrier object: " << this->m_Barrier.GetPointer() << std::endl;
}
} // end namespace itk
#endif
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