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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 itkVnlHalfHermitianToRealInverseFFTImageFilter_h
#define itkVnlHalfHermitianToRealInverseFFTImageFilter_h
#include "itkHalfHermitianToRealInverseFFTImageFilter.h"
#include "itkVnlFFTCommon.h"
#include "itkImage.h"
#include "vnl/algo/vnl_fft_base.h"
#include "itkFFTImageFilterFactory.h"
namespace itk
{
/**
* \class VnlHalfHermitianToRealInverseFFTImageFilter
*
* \brief VNL-based reverse Fast Fourier Transform.
*
* The input image size must be a multiple of combinations of 2s, 3s,
* and/or 5s in all dimensions (2, 3, and 5 should be the only prime
* factors of the image size along each dimension).
*
* \ingroup FourierTransform
*
* \sa HalfHermitianToRealInverseFFTImageFilter
* \ingroup ITKFFT
*
*/
template <typename TInputImage,
typename TOutputImage = Image<typename TInputImage::PixelType::value_type, TInputImage::ImageDimension>>
class ITK_TEMPLATE_EXPORT VnlHalfHermitianToRealInverseFFTImageFilter
: public HalfHermitianToRealInverseFFTImageFilter<TInputImage, TOutputImage>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(VnlHalfHermitianToRealInverseFFTImageFilter);
/** Standard class type aliases. */
using InputImageType = TInputImage;
using InputPixelType = typename InputImageType::PixelType;
using InputSizeType = typename InputImageType::SizeType;
using InputIndexType = typename InputImageType::IndexType;
using InputSizeValueType = typename InputImageType::SizeValueType;
using OutputImageType = TOutputImage;
using OutputPixelType = typename OutputImageType::PixelType;
using OutputIndexType = typename OutputImageType::IndexType;
using OutputSizeType = typename OutputImageType::SizeType;
using OutputIndexValueType = typename OutputImageType::IndexValueType;
using Self = VnlHalfHermitianToRealInverseFFTImageFilter;
using Superclass = HalfHermitianToRealInverseFFTImageFilter<TInputImage, TOutputImage>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(VnlHalfHermitianToRealInverseFFTImageFilter);
/** Extract the dimensionality of the images. They must be the
* same. */
static constexpr unsigned int ImageDimension = TOutputImage::ImageDimension;
static constexpr unsigned int InputImageDimension = TInputImage::ImageDimension;
static constexpr unsigned int OutputImageDimension = TOutputImage::ImageDimension;
SizeValueType
GetSizeGreatestPrimeFactor() const override;
#ifdef ITK_USE_CONCEPT_CHECKING
// Begin concept checking
itkConceptMacro(PixelUnsignedIntDivisionOperatorsCheck, (Concept::DivisionOperators<OutputPixelType, unsigned int>));
itkConceptMacro(ImageDimensionsMatchCheck, (Concept::SameDimension<InputImageDimension, OutputImageDimension>));
// End concept checking
#endif
protected:
VnlHalfHermitianToRealInverseFFTImageFilter() = default;
~VnlHalfHermitianToRealInverseFFTImageFilter() override = default;
void
GenerateData() override;
private:
using SignalVectorType = vnl_vector<InputPixelType>;
};
// Describe whether input/output are real- or complex-valued
// for factory registration
template <>
struct FFTImageFilterTraits<VnlHalfHermitianToRealInverseFFTImageFilter>
{
template <typename TUnderlying>
using InputPixelType = std::complex<TUnderlying>;
template <typename TUnderlying>
using OutputPixelType = TUnderlying;
using FilterDimensions = std::integer_sequence<unsigned int, 4, 3, 2, 1>;
};
} // namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkVnlHalfHermitianToRealInverseFFTImageFilter.hxx"
#endif
#endif
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