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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 itkFFTPadImageFilter_hxx
#define itkFFTPadImageFilter_hxx
#include "itkFFTPadImageFilter.h"
#include "itkProgressAccumulator.h"
#include "itkNumericTraits.h"
#include "itkPadImageFilter.h"
#include "itkChangeInformationImageFilter.h"
#include "itkForwardFFTImageFilter.h"
#include "itkMath.h"
namespace itk
{
template <class TInputImage, class TOutputImage>
FFTPadImageFilter<TInputImage, TOutputImage>
::FFTPadImageFilter()
{
typedef Image< float, TInputImage::ImageDimension > RealImageType;
typedef ForwardFFTImageFilter< RealImageType > FFTFilterType;
m_SizeGreatestPrimeFactor = FFTFilterType::New()->GetSizeGreatestPrimeFactor();
Self::InternalSetBoundaryCondition( &m_DefaultBoundaryCondition );
}
template <class TInputImage, class TOutputImage>
void
FFTPadImageFilter<TInputImage, TOutputImage>
::GenerateOutputInformation()
{
// call the superclass' implementation of this method
Superclass::GenerateOutputInformation();
const InputImageType * input0 = this->GetInput();
OutputImageType * output0 = this->GetOutput();
RegionType region0 = input0->GetLargestPossibleRegion();
SizeType size;
IndexType index;
for( unsigned int i=0; i<ImageDimension; ++i )
{
SizeValueType padSize = 0;
if( m_SizeGreatestPrimeFactor > 1 )
{
while( Math::GreatestPrimeFactor( region0.GetSize()[i] + padSize ) > m_SizeGreatestPrimeFactor )
{
++padSize;
}
}
else if( m_SizeGreatestPrimeFactor == 1 )
{
// make sure the total size is even
padSize += ( region0.GetSize()[i] + padSize ) % 2;
}
index[i] = region0.GetIndex()[i] - padSize/2;
size[i] = region0.GetSize()[i] + padSize;
}
RegionType region( index, size );
output0->SetLargestPossibleRegion( region );
}
template<class TInputImage, class TOutputImage>
void
FFTPadImageFilter<TInputImage, TOutputImage>
::PrintSelf(std::ostream &os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "SizeGreatestPrimeFactor: " << m_SizeGreatestPrimeFactor << std::endl;
}
}// end namespace itk
#endif
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