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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 itkHalfToFullHermitianImageFilter_h
#define itkHalfToFullHermitianImageFilter_h
#include "itkImageToImageFilter.h"
#include "itkSimpleDataObjectDecorator.h"
namespace itk
{
/** \class HalfToFullHermitianImageFilter
*
* \brief Expands a half image produced from a real-to-complex
* discrete Fourier transform (DFT) to the full complex image.
*
* The subclasses of RealToHalfHermitianForwardFFTImageFilter produce only
* the non-redundant half of the image resulting from a
* real-to-complex DFT. This filter takes the non-redundant half image
* and generates the full complex image that includes the redundant
* half. It requires additional information about the output image
* size, namely, whether the size in the first dimension of the output
* image is odd.
*
* \ingroup FourierTransform
*
* \sa RealToHalfHermitianForwardFFTImageFilter
* \ingroup ITKFFT
*/
template< typename TInputImage >
class ITK_TEMPLATE_EXPORT HalfToFullHermitianImageFilter :
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 HalfToFullHermitianImageFilter 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(HalfToFullHermitianImageFilter,
ImageToImageFilter);
/** Extract the dimensionality of the input and output images. */
itkStaticConstMacro(ImageDimension, unsigned int,
TInputImage::ImageDimension);
/** Was the original truncated dimension size in the x-dimension odd? */
itkSetGetDecoratedInputMacro(ActualXDimensionIsOdd, bool);
itkBooleanMacro(ActualXDimensionIsOdd);
protected:
HalfToFullHermitianImageFilter();
~HalfToFullHermitianImageFilter() 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;
private:
ITK_DISALLOW_COPY_AND_ASSIGN(HalfToFullHermitianImageFilter);
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkHalfToFullHermitianImageFilter.hxx"
#endif
#endif // itkHalfToFullHermitianImageFilter_h
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