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/*=========================================================================
*
* Copyright NumFOCUS
*
* 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
*
* https://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 itkComplexToComplex1DFFTImageFilter_hxx
#define itkComplexToComplex1DFFTImageFilter_hxx
#include "itkMetaDataDictionary.h"
#include "itkMetaDataObject.h"
namespace itk
{
template <typename TInputImage, typename TOutputImage>
ComplexToComplex1DFFTImageFilter<TInputImage, TOutputImage>::ComplexToComplex1DFFTImageFilter() = default;
template <typename TInputImage, typename TOutputImage>
void
ComplexToComplex1DFFTImageFilter<TInputImage, TOutputImage>::GenerateInputRequestedRegion()
{
// call the superclass' implementation of this method
Superclass::GenerateInputRequestedRegion();
// get pointers to the inputs
typename InputImageType::Pointer inputPtr = const_cast<InputImageType *>(this->GetInput());
typename OutputImageType::Pointer outputPtr = this->GetOutput();
if (!inputPtr || !outputPtr)
{
return;
}
// we need to compute the input requested region (size and start index)
using OutputSizeType = const typename OutputImageType::SizeType &;
OutputSizeType outputRequestedRegionSize = outputPtr->GetRequestedRegion().GetSize();
using OutputIndexType = const typename OutputImageType::IndexType &;
OutputIndexType outputRequestedRegionStartIndex = outputPtr->GetRequestedRegion().GetIndex();
//// the regions other than the fft direction are fine
typename InputImageType::SizeType inputRequestedRegionSize = outputRequestedRegionSize;
typename InputImageType::IndexType inputRequestedRegionStartIndex = outputRequestedRegionStartIndex;
// we but need all of the input in the fft direction
const unsigned int direction = this->m_Direction;
const typename InputImageType::SizeType & inputLargeSize = inputPtr->GetLargestPossibleRegion().GetSize();
inputRequestedRegionSize[direction] = inputLargeSize[direction];
const typename InputImageType::IndexType & inputLargeIndex = inputPtr->GetLargestPossibleRegion().GetIndex();
inputRequestedRegionStartIndex[direction] = inputLargeIndex[direction];
const typename InputImageType::RegionType inputRequestedRegion(inputRequestedRegionStartIndex,
inputRequestedRegionSize);
inputPtr->SetRequestedRegion(inputRequestedRegion);
}
template <typename TInputImage, typename TOutputImage>
void
ComplexToComplex1DFFTImageFilter<TInputImage, TOutputImage>::EnlargeOutputRequestedRegion(DataObject * output)
{
OutputImageType * outputPtr = dynamic_cast<OutputImageType *>(output);
// we need to enlarge the region in the fft direction to the
// largest possible in that direction
using ConstOutputSizeType = const typename OutputImageType::SizeType &;
ConstOutputSizeType requestedSize = outputPtr->GetRequestedRegion().GetSize();
ConstOutputSizeType outputLargeSize = outputPtr->GetLargestPossibleRegion().GetSize();
using ConstOutputIndexType = const typename OutputImageType::IndexType &;
ConstOutputIndexType requestedIndex = outputPtr->GetRequestedRegion().GetIndex();
ConstOutputIndexType outputLargeIndex = outputPtr->GetLargestPossibleRegion().GetIndex();
typename OutputImageType::SizeType enlargedSize = requestedSize;
typename OutputImageType::IndexType enlargedIndex = requestedIndex;
enlargedSize[this->m_Direction] = outputLargeSize[this->m_Direction];
enlargedIndex[this->m_Direction] = outputLargeIndex[this->m_Direction];
const typename OutputImageType::RegionType enlargedRegion(enlargedIndex, enlargedSize);
outputPtr->SetRequestedRegion(enlargedRegion);
}
template <typename TInputImage, typename TOutputImage>
void
ComplexToComplex1DFFTImageFilter<TInputImage, TOutputImage>::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "Direction: " << m_Direction << std::endl;
os << indent << "TransformDirection: " << m_TransformDirection << std::endl;
}
} // end namespace itk
#endif // itkComplexToComplex1DFFTImageFilter_hxx
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