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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 __itkComposeDiffeomorphismsImageFilter_hxx
#define __itkComposeDiffeomorphismsImageFilter_hxx
#include "itkComposeDiffeomorphismsImageFilter.h"
#include "itkImageRegionConstIterator.h"
#include "itkImageRegionIteratorWithIndex.h"
#include "itkVectorLinearInterpolateImageFunction.h"
namespace itk
{
/*
* ComposeDiffeomorphismsImageFilter class definitions
*/
template <class InputImage, class TOutputImage>
ComposeDiffeomorphismsImageFilter<InputImage, TOutputImage>
::ComposeDiffeomorphismsImageFilter()
{
this->SetNumberOfRequiredInputs( 2 );
typedef VectorLinearInterpolateImageFunction
<InputFieldType, RealType> DefaultInterpolatorType;
typename DefaultInterpolatorType::Pointer interpolator
= DefaultInterpolatorType::New();
this->m_Interpolator = interpolator;
}
template <class InputImage, class TOutputImage>
ComposeDiffeomorphismsImageFilter<InputImage, TOutputImage>
::~ComposeDiffeomorphismsImageFilter()
{
}
template <class InputImage, class TOutputImage>
void
ComposeDiffeomorphismsImageFilter<InputImage, TOutputImage>
::SetInterpolator( InterpolatorType *interpolator )
{
itkDebugMacro( "setting Interpolator to " << interpolator );
if( this->m_Interpolator != interpolator )
{
this->m_Interpolator = interpolator;
this->Modified();
if( !this->GetDisplacementField() )
{
this->m_Interpolator->SetInputImage( this->GetInput( 0 ) );
}
}
}
template <class InputImage, class TOutputImage>
void
ComposeDiffeomorphismsImageFilter<InputImage, TOutputImage>
::BeforeThreadedGenerateData()
{
VectorType zeroVector( 0.0 );
this->AllocateOutputs();
this->GetOutput()->FillBuffer( zeroVector );
}
template <class InputImage, class TOutputImage>
void
ComposeDiffeomorphismsImageFilter<InputImage, TOutputImage>
::ThreadedGenerateData( const RegionType & region, ThreadIdType itkNotUsed( threadId ) )
{
VectorType zeroVector( 0.0 );
typename OutputFieldType::Pointer output = this->GetOutput();
ImageRegionConstIterator<InputFieldType> ItW( this->GetWarpingField(), region );
ImageRegionIteratorWithIndex<OutputFieldType> ItF( output, region );
for( ItW.GoToBegin(), ItF.GoToBegin(); !ItW.IsAtEnd(); ++ItW, ++ItF )
{
PointType point1;
output->TransformIndexToPhysicalPoint( ItF.GetIndex(), point1 );
typename InputFieldType::PixelType tmpWarp = ItW.Get();
PointType point2 = point1;
for( unsigned int d = 0; d < point2.PointDimension; d++ )
{
point2[d] += tmpWarp[d];
}
typename InterpolatorType::OutputType displacement;
if( this->m_Interpolator->IsInsideBuffer( point2 ) )
{
displacement = this->m_Interpolator->Evaluate( point2 );
typename OutputFieldType::PixelType tmpOut;
tmpOut = ( point2 + displacement ) - point1;
ItF.Set( tmpOut );
}
}
}
template <class InputImage, class TOutputImage>
void
ComposeDiffeomorphismsImageFilter<InputImage, TOutputImage>
::PrintSelf( std::ostream& os, Indent indent ) const
{
Superclass::PrintSelf( os, indent );
}
} // end namespace itk
#endif
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