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60 lines
2.1 KiB
C++
60 lines
2.1 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkImageFFT.h
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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/**
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* @class vtkImageFFT
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* @brief Fast Fourier Transform.
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*
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* vtkImageFFT implements a fast Fourier transform. The input
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* can have real or complex data in any components and data types, but
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* the output is always complex doubles with real values in component0, and
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* imaginary values in component1. The filter is fastest for images that
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* have power of two sizes. The filter uses a butterfly diagram for each
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* prime factor of the dimension. This makes images with prime number dimensions
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* (i.e. 17x17) much slower to compute. Multi dimensional (i.e volumes)
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* FFT's are decomposed so that each axis executes serially.
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*/
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#ifndef vtkImageFFT_h
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#define vtkImageFFT_h
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#include "vtkImageFourierFilter.h"
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#include "vtkImagingFourierModule.h" // For export macro
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class VTKIMAGINGFOURIER_EXPORT vtkImageFFT : public vtkImageFourierFilter
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{
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public:
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static vtkImageFFT* New();
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vtkTypeMacro(vtkImageFFT, vtkImageFourierFilter);
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protected:
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vtkImageFFT() {}
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~vtkImageFFT() override {}
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int IterativeRequestInformation(vtkInformation* in, vtkInformation* out) override;
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int IterativeRequestUpdateExtent(vtkInformation* in, vtkInformation* out) override;
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void ThreadedRequestData(vtkInformation* vtkNotUsed(request), vtkInformationVector** inputVector,
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vtkInformationVector* vtkNotUsed(outputVector), vtkImageData*** inDataVec,
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vtkImageData** outDataVec, int outExt[6], int threadId) override;
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private:
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vtkImageFFT(const vtkImageFFT&) = delete;
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void operator=(const vtkImageFFT&) = delete;
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};
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#endif
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// VTK-HeaderTest-Exclude: vtkImageFFT.h
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