Applies the various different DFT algorithms to Blitz++ constructs. More...

#include <DGVFourierTransform.h>

Public Member Functions
void	FFT (Array< complex< type >, rank > &field, Array< complex< type >, rank > &fftOfField)
	The Complex valued Fast Fourier Transform (FFT). Uses the FFTW C library.
void	iFFT (Array< complex< type >, rank > &fftOfField, Array< complex< type >, rank > &field)
	The Complex valued Inverse Fast Fourier Transform (iFFT). Uses the FFTW C library.
void	FFT_Real2Complex (Array< type, rank > &field, Array< complex< type >, rank > &fftOfField)
void	FFT_Complex2Real (Array< complex< type >, rank > &fftOfField, Array< type, rank > &field)
void	normalise (Array< complex< type >, rank > &field)
	Normalise the result of the Transform.
void	normalise (Array< type, rank > &field)
	Normalise the result of the Transform.
Array< type, rank >	shiftDC (Array< type, rank > &field)
	Shift the DC by half the array size periodically.
Array< complex< type >, rank >	shiftDC (Array< complex< type >, rank > &field)
	Shift the DC by half the array size periodically.
void	reset ()
	Reset the Transform.
Constructors

	DGVFourierTransform ()
	Standard Constructor.
virtual	~DGVFourierTransform ()
Protected Member Functions
void	execute ()
	Execute the plan constructed.
Protected Attributes
unsigned	mode
	FFTW Plan Flag.
fftw_plan	plan
	FFTW Paln for DFT's.

Detailed Description

template<typename type, int rank>
class DGVFourierTransform< type, rank >

Applies the various different DFT algorithms to Blitz++ constructs.

The FFTW library is used to implement the DFT algorithms on Blitz++ Arrays. The class can only handle upto 1D/2D/3D transforms and not higher. All results are un-normalised. Normalisations must be called using the normalise() function.

Usage Example:

    DGVFourierTransform<double,2> Fourier; 
    Array<complex<double>,2> image, kSpace;

    //Load or create image here
    ...

    Fourier.FFT(image,kSpace);

Definition at line 49 of file DGVFourierTransform.h.

Constructor & Destructor Documentation

template<typename type , int rank>

DGVFourierTransform< type, rank >::DGVFourierTransform ( void )

Standard Constructor.

Definition at line 116 of file DGVFourierTransform.h.

template<typename type , int rank>

DGVFourierTransform< type, rank >::~DGVFourierTransform ( ) [virtual]

Definition at line 122 of file DGVFourierTransform.h.

Member Function Documentation

template<typename type , int rank>

void DGVFourierTransform< type, rank >::execute ( ) [protected]

Execute the plan constructed.

Definition at line 247 of file DGVFourierTransform.h.