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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 itkFullToHalfHermitianImageFilter_h
#define itkFullToHalfHermitianImageFilter_h
#include "itkImageToImageFilter.h"
#include "itkSimpleDataObjectDecorator.h"
namespace itk
{
/** \class FullToHalfHermitianImageFilter
*
* \brief Reduces the size of a full complex image produced from a
* forward discrete Fourier transform of a real image to only the
* non-redundant half of the image.
*
* In particular, this filter reduces the size of the image in the
* first dimension to \f$\lfloor N/2 \rfloor + 1 \f$.
*
* \ingroup FourierTransform
*
* \sa HalfToFullHermitianImageFilter
* \sa ForwardFFTImageFilter
* \sa InverseFFTImageFilter
* \sa RealToHalfHermitianForwardFFTImageFilter
* \sa HalfHermitianToRealInverseFFTImageFilter
* \ingroup ITKFFT
*/
template< typename TInputImage >
class ITK_TEMPLATE_EXPORT FullToHalfHermitianImageFilter :
public ImageToImageFilter< TInputImage, TInputImage >
{
public:
/** Standard class typedefs. */
typedef TInputImage InputImageType;
typedef typename InputImageType::PixelType InputImagePixelType;
typedef typename InputImageType::IndexType InputImageIndexType;
typedef typename InputImageType::IndexValueType InputImageIndexValueType;
typedef typename InputImageType::SizeType InputImageSizeType;
typedef typename InputImageType::SizeValueType InputImageSizeValueType;
typedef typename InputImageType::RegionType InputImageRegionType;
typedef TInputImage OutputImageType;
typedef typename OutputImageType::PixelType OutputImagePixelType;
typedef typename OutputImageType::IndexType OutputImageIndexType;
typedef typename OutputImageType::IndexValueType OutputImageIndexValueType;
typedef typename OutputImageType::SizeType OutputImageSizeType;
typedef typename OutputImageType::SizeValueType OutputImageSizeValueType;
typedef typename OutputImageType::RegionType OutputImageRegionType;
typedef FullToHalfHermitianImageFilter Self;
typedef ImageToImageFilter< TInputImage, TInputImage > Superclass;
typedef SmartPointer< Self > Pointer;
typedef SmartPointer< const Self > ConstPointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods). */
itkTypeMacro(FullToHalfHermitianImageFilter,
ImageToImageFilter);
/** Extract the dimensionality of the input and output images. */
itkStaticConstMacro(ImageDimension, unsigned int,
TInputImage::ImageDimension);
/** Get whether the actual X dimension of the image is odd or not in the full
* representation */
itkGetDecoratedOutputMacro(ActualXDimensionIsOdd, bool);
protected:
FullToHalfHermitianImageFilter();
~FullToHalfHermitianImageFilter() ITK_OVERRIDE {}
void ThreadedGenerateData(const OutputImageRegionType & outputRegionForThread,
ThreadIdType threadId) ITK_OVERRIDE;
/** The output is a different size from the input. */
virtual void GenerateOutputInformation() ITK_OVERRIDE;
/** This class requires the entire input. */
virtual void GenerateInputRequestedRegion() ITK_OVERRIDE;
itkSetDecoratedOutputMacro(ActualXDimensionIsOdd, bool);
private:
ITK_DISALLOW_COPY_AND_ASSIGN(FullToHalfHermitianImageFilter);
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkFullToHalfHermitianImageFilter.hxx"
#endif
#endif // itkFullToHalfHermitianImageFilter_h
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