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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 itkMaskedImageToHistogramFilter_hxx
#define itkMaskedImageToHistogramFilter_hxx
#include "itkMaskedImageToHistogramFilter.h"
#include "itkProgressReporter.h"
#include "itkImageRegionConstIterator.h"
namespace itk
{
namespace Statistics
{
template< typename TImage, typename TMaskImage >
MaskedImageToHistogramFilter< TImage, TMaskImage >
::MaskedImageToHistogramFilter()
{
// this->SetNumberOfRequiredInputs(2);
this->SetMaskValue( NumericTraits<MaskPixelType>::max() );
}
template< typename TImage, typename TMaskImage >
void
MaskedImageToHistogramFilter< TImage, TMaskImage >
::ThreadedComputeMinimumAndMaximum( const RegionType & inputRegionForThread, ThreadIdType threadId, ProgressReporter & progress )
{
unsigned int nbOfComponents = this->GetInput()->GetNumberOfComponentsPerPixel();
HistogramMeasurementVectorType min( nbOfComponents );
HistogramMeasurementVectorType max( nbOfComponents );
MaskPixelType maskValue = this->GetMaskValue();
ImageRegionConstIterator< TImage > inputIt( this->GetInput(), inputRegionForThread );
ImageRegionConstIterator< TMaskImage > maskIt( this->GetMaskImage(), inputRegionForThread );
inputIt.GoToBegin();
maskIt.GoToBegin();
HistogramMeasurementVectorType m( nbOfComponents );
min.Fill( NumericTraits<ValueType>::max() );
max.Fill( NumericTraits<ValueType>::NonpositiveMin() );
while ( !inputIt.IsAtEnd() )
{
if( maskIt.Get() == maskValue )
{
const PixelType & p = inputIt.Get();
NumericTraits<PixelType>::AssignToArray( p, m );
for( unsigned int i=0; i<nbOfComponents; i++ )
{
min[i] = std::min( m[i], min[i] );
max[i] = std::max( m[i], max[i] );
}
}
++inputIt;
++maskIt;
progress.CompletedPixel(); // potential exception thrown here
}
this->m_Minimums[threadId] = min;
this->m_Maximums[threadId] = max;
}
template< typename TImage, typename TMaskImage >
void
MaskedImageToHistogramFilter< TImage, TMaskImage >
::ThreadedComputeHistogram(const RegionType & inputRegionForThread, ThreadIdType threadId, ProgressReporter & progress )
{
unsigned int nbOfComponents = this->GetInput()->GetNumberOfComponentsPerPixel();
ImageRegionConstIterator< TImage > inputIt( this->GetInput(), inputRegionForThread );
ImageRegionConstIterator< TMaskImage > maskIt( this->GetMaskImage(), inputRegionForThread );
inputIt.GoToBegin();
maskIt.GoToBegin();
HistogramMeasurementVectorType m( nbOfComponents );
MaskPixelType maskValue = this->GetMaskValue();
typename HistogramType::IndexType index;
while ( !inputIt.IsAtEnd() )
{
if( maskIt.Get() == maskValue )
{
const PixelType & p = inputIt.Get();
NumericTraits<PixelType>::AssignToArray( p, m );
this->m_Histograms[threadId]->GetIndex( m, index );
this->m_Histograms[threadId]->IncreaseFrequencyOfIndex( index, 1 );
}
++inputIt;
++maskIt;
progress.CompletedPixel(); // potential exception thrown here
}
}
} // end of namespace Statistics
} // end of namespace itk
#endif
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