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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.
*
*=========================================================================*/
/*=========================================================================
*
* Portions of this file are subject to the VTK Toolkit Version 3 copyright.
*
* Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
*
* For complete copyright, license and disclaimer of warranty information
* please refer to the NOTICE file at the top of the ITK source tree.
*
*=========================================================================*/
#ifndef itkInPlaceLabelMapFilter_hxx
#define itkInPlaceLabelMapFilter_hxx
#include "itkInPlaceLabelMapFilter.h"
/*
*
* This code was contributed in the Insight Journal paper:
* "Label object representation and manipulation with ITK"
* by Lehmann G.
* https://hdl.handle.net/1926/584
* http://www.insight-journal.org/browse/publication/176
*
*/
namespace itk
{
/**
*
*/
template< typename TInputImage >
InPlaceLabelMapFilter< TInputImage >
::InPlaceLabelMapFilter():m_InPlace(true)
{}
/**
*
*/
template< typename TInputImage >
InPlaceLabelMapFilter< TInputImage >
::~InPlaceLabelMapFilter()
{}
template< typename TInputImage >
void
InPlaceLabelMapFilter< TInputImage >
::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "InPlace: " << ( this->m_InPlace ? "On" : "Off" ) << std::endl;
if ( this->CanRunInPlace() )
{
os << indent << "The input and output to this filter are the same type. The filter can be run in place."
<< std::endl;
}
else
{
os << indent << "The input and output to this filter are different types. The filter cannot be run in place."
<< std::endl;
}
}
template< typename TInputImage >
void
InPlaceLabelMapFilter< TInputImage >
::AllocateOutputs()
{
// if told to run in place and the types support it,
if ( this->m_InPlace && this->CanRunInPlace() )
{
// Graft this first input to the output. Later, we'll need to
// remove the input's hold on the bulk data.
//
OutputImagePointer inputAsOutput = dynamic_cast< TOutputImage * >( const_cast< TInputImage * >( this->GetInput() ) );
if ( inputAsOutput )
{
// save the largest possible region to restore it after the graft output.
// the largest possible region is not that important with LabelMap and
// can be managed by the filter, even when running inplace
RegionType region = this->GetOutput()->GetLargestPossibleRegion();
this->GraftOutput(inputAsOutput);
this->GetOutput()->SetRegions(region);
}
// If there are more than one outputs, allocate the remaining outputs
for ( unsigned int i = 1; i < this->GetNumberOfIndexedOutputs(); i++ )
{
OutputImagePointer outputPtr;
outputPtr = this->GetOutput(i);
outputPtr->SetBufferedRegion( outputPtr->GetRequestedRegion() );
outputPtr->Allocate();
}
}
else
{
Superclass::AllocateOutputs();
// copy the content of the input image to the output image
const TInputImage *input = this->GetInput();
TOutputImage * output = this->GetOutput();
itkAssertInDebugAndIgnoreInReleaseMacro(input != ITK_NULLPTR);
itkAssertInDebugAndIgnoreInReleaseMacro(output != ITK_NULLPTR);
output->SetBackgroundValue( input->GetBackgroundValue() );
typename TInputImage::ConstIterator it( input );
while ( ! it.IsAtEnd() )
{
const LabelObjectType *labelObject = it.GetLabelObject();
itkAssertInDebugAndIgnoreInReleaseMacro(labelObject != ITK_NULLPTR);
itkAssertInDebugAndIgnoreInReleaseMacro(labelObject->GetLabel() == it.GetLabel());
typename LabelObjectType::Pointer newLabelObject = LabelObjectType::New();
newLabelObject->template CopyAllFrom<LabelObjectType>(labelObject);
output->AddLabelObject(newLabelObject);
++it;
}
}
}
} // end namespace itk
#endif
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