/usr/include/vtk-6.3/vtkImageFFT.h is in libvtk6-dev 6.3.0+dfsg1-11build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 | /*=========================================================================
Program: Visualization Toolkit
Module: vtkImageFFT.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
// .NAME vtkImageFFT - Fast Fourier Transform.
// .SECTION Description
// vtkImageFFT implements a fast Fourier transform. The input
// can have real or complex data in any components and data types, but
// the output is always complex doubles with real values in component0, and
// imaginary values in component1. The filter is fastest for images that
// have power of two sizes. The filter uses a butterfly diagram for each
// prime factor of the dimension. This makes images with prime number dimensions
// (i.e. 17x17) much slower to compute. Multi dimensional (i.e volumes)
// FFT's are decomposed so that each axis executes serially.
#ifndef vtkImageFFT_h
#define vtkImageFFT_h
#include "vtkImagingFourierModule.h" // For export macro
#include "vtkImageFourierFilter.h"
class VTKIMAGINGFOURIER_EXPORT vtkImageFFT : public vtkImageFourierFilter
{
public:
static vtkImageFFT *New();
vtkTypeMacro(vtkImageFFT,vtkImageFourierFilter);
// Description:
// Used internally for streaming and threads.
// Splits output update extent into num pieces.
// This method needs to be called num times. Results must not overlap for
// consistent starting extent. Subclass can override this method.
// This method returns the number of pieces resulting from a
// successful split. This can be from 1 to "total".
// If 1 is returned, the extent cannot be split.
int SplitExtent(int splitExt[6], int startExt[6],
int num, int total);
protected:
vtkImageFFT() {}
~vtkImageFFT() {}
virtual int IterativeRequestInformation(vtkInformation* in,
vtkInformation* out);
virtual int IterativeRequestUpdateExtent(vtkInformation* in,
vtkInformation* out);
virtual void ThreadedRequestData(
vtkInformation* vtkNotUsed( request ),
vtkInformationVector** inputVector,
vtkInformationVector* vtkNotUsed( outputVector ),
vtkImageData ***inDataVec,
vtkImageData **outDataVec,
int outExt[6],
int threadId);
private:
vtkImageFFT(const vtkImageFFT&); // Not implemented.
void operator=(const vtkImageFFT&); // Not implemented.
};
#endif
// VTK-HeaderTest-Exclude: vtkImageFFT.h
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