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Simulate and fit neutron and x-ray scattering at grazing incidence
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FourierTransform Class Reference
Tools_internal

Fourier transform of vectors (in 1D or 2D) using Fast Fourier Transform (fftw package). More...

Public Types

typedef std::vector< double > double1d_t
 definition of 1D vector of double
 
typedef std::vector< double1d_t > double2d_t
 definition of 2D vector of double
 

Public Member Functions

void fft (const double1d_t &source, double1d_t &result)
 FT in 1D.
 
void fftshift (double1d_t &result)
 Shift low frequency to the center of 1D FT array.
 
void fft (const double2d_t &source, double2d_t &result)
 FT in 2D.
 
void fftshift (double2d_t &result)
 Shift low frequency to the center of 2D FT array.
 
void init (int h_src, int w_src)
 prepare arrays for 2D Fourier Transformation (FT) of the given vector
 

Detailed Description

Fourier transform of vectors (in 1D or 2D) using Fast Fourier Transform (fftw package).

Usage: std::vector<double> signal, result; FourierTransform ft; ft.fft(signal, result)

Given code rely on code from Jeremy Fix page, http://jeremy.fix.free.fr/spip.php?article15, see also "Efficient convolution using the Fast Fourier Transform, Application in C++" by Jeremy Fix, May 30, 2011

Definition at line 34 of file FourierTransform.h.

The documentation for this class was generated from the following files: