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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 itkFFTWInverseFFTImageFilter_hxx
#define itkFFTWInverseFFTImageFilter_hxx
#include "itkFullToHalfHermitianImageFilter.h"
#include "itkFFTWInverseFFTImageFilter.h"
#include "itkInverseFFTImageFilter.hxx"
#include "itkImageRegionIterator.h"
#include "itkProgressReporter.h"
namespace itk
{
template< typename TInputImage, typename TOutputImage >
FFTWInverseFFTImageFilter< TInputImage, TOutputImage >
::FFTWInverseFFTImageFilter()
{
m_PlanRigor = FFTWGlobalConfiguration::GetPlanRigor();
}
template< typename TInputImage, typename TOutputImage >
void
FFTWInverseFFTImageFilter< TInputImage, TOutputImage >
::BeforeThreadedGenerateData()
{
// Get pointers to the input and output.
typename InputImageType::ConstPointer inputPtr = this->GetInput();
typename OutputImageType::Pointer outputPtr = this->GetOutput();
if ( !inputPtr || !outputPtr )
{
return;
}
// We don't have a nice progress to report, but at least this simple line
// reports the beginning and the end of the process.
ProgressReporter progress( this, 0, 1 );
// Allocate output buffer memory.
outputPtr->SetBufferedRegion( outputPtr->GetRequestedRegion() );
outputPtr->Allocate();
const InputSizeType inputSize = inputPtr->GetLargestPossibleRegion().GetSize();
const OutputSizeType outputSize = outputPtr->GetLargestPossibleRegion().GetSize();
// Figure out sizes.
// Size of input and output aren't the same which is handled in the superclass,
// sort of.
// The input size and output size only differ in the fastest moving dimension.
unsigned int totalOutputSize = 1;
unsigned int totalInputSize = 1;
for ( unsigned i = 0; i < ImageDimension; i++ )
{
totalOutputSize *= outputSize[i];
totalInputSize *= inputSize[i];
}
// Cut the full complex image to just the portion needed by FFTW.
typedef FullToHalfHermitianImageFilter< InputImageType > FullToHalfFilterType;
typename FullToHalfFilterType::Pointer fullToHalfFilter = FullToHalfFilterType::New();
fullToHalfFilter->SetInput( this->GetInput() );
fullToHalfFilter->SetNumberOfThreads( this->GetNumberOfThreads() );
fullToHalfFilter->UpdateLargestPossibleRegion();
typename FFTWProxyType::ComplexType * in =
(typename FFTWProxyType::ComplexType *) fullToHalfFilter->GetOutput()->GetBufferPointer();
OutputPixelType * out = outputPtr->GetBufferPointer();
typename FFTWProxyType::PlanType plan;
int sizes[ImageDimension];
for( unsigned int i = 0; i < ImageDimension; i++ )
{
sizes[(ImageDimension - 1) - i] = outputSize[i];
}
plan = FFTWProxyType::Plan_dft_c2r( ImageDimension, sizes, in, out, m_PlanRigor,
this->GetNumberOfThreads(), false );
FFTWProxyType::Execute( plan );
// Some cleanup.
FFTWProxyType::DestroyPlan( plan );
}
template <typename TInputImage, typename TOutputImage>
void
FFTWInverseFFTImageFilter< TInputImage, TOutputImage >
::ThreadedGenerateData(const OutputImageRegionType& outputRegionForThread, ThreadIdType itkNotUsed(threadId) )
{
typedef ImageRegionIterator< OutputImageType > IteratorType;
unsigned long totalOutputSize = this->GetOutput()->GetRequestedRegion().GetNumberOfPixels();
IteratorType it( this->GetOutput(), outputRegionForThread );
while( !it.IsAtEnd() )
{
it.Set( it.Value() / totalOutputSize );
++it;
}
}
template< typename TInputImage, typename TOutputImage >
void
FFTWInverseFFTImageFilter< TInputImage, TOutputImage >
::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf( os, indent );
os << indent << "PlanRigor: " << FFTWGlobalConfiguration::GetPlanRigorName( m_PlanRigor )
<< " (" << m_PlanRigor << ")" << std::endl;
}
template< typename TInputImage, typename TOutputImage >
SizeValueType
FFTWInverseFFTImageFilter< TInputImage, TOutputImage >
::GetSizeGreatestPrimeFactor() const
{
return FFTWProxyType::GREATEST_PRIME_FACTOR;
}
} // namespace itk
#endif // _itkFFTWInverseFFTImageFilter_hxx
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