vnl_fft1d< T > Class Template Reference

#include <vnl_fft1d.h>

Inheritance diagram for vnl_fft1d:

[legend]Collaboration diagram for vnl_fft1d< T >:

[legend]List of all members.

Public Methods
	vnl_fft1d (const vnl_vector< T > &r)
	vnl_fft1d (const vnl_vector< vcl_complex< T > > &z, int dir)
	vnl_fft1d (const vnl_vector< T > &r, const vnl_vector< T > &i, const vnl_fftxd_prime_factors< T > &oPF, int dir)
	vnl_fft1d (const vnl_vector< T > &r, const vnl_fftxd_prime_factors< T > &oPF, int dir)
	vnl_fft1d (const T *realdata, const T *imagdata, unsigned len, const vnl_fftxd_prime_factors< T > &, int dir)
	vnl_fft1d (const T *data, unsigned len, const vnl_fftxd_prime_factors< T > &, int dir)
	vnl_fft1d (const vnl_vector< vcl_complex< T > > &c, const vnl_fftxd_prime_factors< T > &, int dir)
	vnl_fft1d (const vcl_complex< T > *cdata, unsigned len, const vnl_fftxd_prime_factors< T > &, int dir)
Static Public Methods
int	doFFT_IP (vcl_complex< T > *cdata, unsigned len, const vnl_fftxd_prime_factors< T > &, int dir)

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Detailed Description

template<class T>
class vnl_fft1d< T >

Templated 1D FFT class based on Temperton FFT routines.

C TEMPERTON A GENERALIZED PRIME FACTOR FFT ALGORITHM FOR ANY SIAM J. SCI. STAT. COMP., MAY 1992.)

original temperton-code (fortran) converted using f2c with -C++ option. Two versions created: float and double.

subclassed from vnl_vector<vnl_complex>, i.e. internally uses vnl_vector<vnl_complex> for storing the data

two super-simple constructors, first takes as input is an vnl_vector<T> for which it will compute the FFT. Second takes vnl_complex_vector_t<T> and direction. Calculates FFT in that direction. For efficiency, all other constructors take as an argument two PrimeFactors<T>-objects which have to be initialised before the call do doFFT. These PrimeFactors<T> objects contain the prime-factors of the 'number' (the size of the array) to be FFT'd. (integral part of Temperton's algorithm)

Definition at line 37 of file vnl_fft1d.h.

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Constructor & Destructor Documentation

template<class T> vnl_fft1d< T >::vnl_fft1d (  const vnl_vector< T > &    r )

real-constructors.

template<class T> vnl_fft1d< T >::vnl_fft1d (  const vnl_vector< vcl_complex< T > > &    z, int    dir )

template<class T> vnl_fft1d< T >::vnl_fft1d (  const vnl_vector< T > &    r, const vnl_vector< T > &    i, const vnl_fftxd_prime_factors< T > &    oPF, int    dir )

(real,imag)-constructors.

template<class T> vnl_fft1d< T >::vnl_fft1d (  const vnl_vector< T > &    r, const vnl_fftxd_prime_factors< T > &    oPF, int    dir )

template<class T> vnl_fft1d< T >::vnl_fft1d (  const T *    realdata, const T *    imagdata, unsigned    len, const vnl_fftxd_prime_factors< T > &   , int    dir )

template<class T> vnl_fft1d< T >::vnl_fft1d (  const T *    data, unsigned    len, const vnl_fftxd_prime_factors< T > &   , int    dir )

template<class T> vnl_fft1d< T >::vnl_fft1d (  const vnl_vector< vcl_complex< T > > &    c, const vnl_fftxd_prime_factors< T > &   , int    dir )

complex-constructor.

template<class T> vnl_fft1d< T >::vnl_fft1d (  const vcl_complex< T > *    cdata, unsigned    len, const vnl_fftxd_prime_factors< T > &   , int    dir )

complex-constructor.

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Member Function Documentation

template<class T> int vnl_fft1d< T >::doFFT_IP (  vcl_complex< T > *    cdata, unsigned    len, const vnl_fftxd_prime_factors< T > &   , int    dir )  [static]

static member function: avoid copy-overhead.

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

• vnl_fft1d.h

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