Parent class to compute the Fourier transforms based on several libraries Survey of FFT implementations: http://www.jjj.de/fft/fftpage.html Child classes specifically offer interface to. More...

#include <FFTCalculator.h>

Inheritance diagram for stira::fouriertools::FFTCalculator:

Public Member Functions
	FFTCalculator (ArrayGrid< std::complex< double > > *pComplexGrid)
	construct an FFT calculator initialized with and FFTBand More...

	FFTCalculator ()
	construct an FFT calculator; not initialized

virtual	~FFTCalculator ()
	destructor

virtual void	ApplyForwardTransform ()=0
	Computes the forward FFT.

virtual void	ApplyInverseTransform ()=0
	Computes the inverse FFT.

void	SwitchQuadrants ()
	Switches the four quadrants by mirroring them around the center of the image As source image, the image given at construction time is used.

void	SwitchQuadrants (ArrayGrid< std::complex< double > > *pGridIn)
	Switches the four quadrants by mirroring them around the center of the image. More...

Protected Member Functions
virtual bool	CreateLibData (ArrayGrid< std::complex< double > > *pGridin)=0
	help method to create the intermediate data structures for the underlying library

virtual bool	CleanLibData ()=0
	help method to clean the intermediate input data structures for the underlying library

virtual void	WriteResultInFFTBand ()=0
	Converts the KISS data structure with the result back to an FFTBand.

Protected Attributes
ArrayGrid< std::complex< double > > *	mpComplexGrid
	Grid with the complex data.

int	mWidth
	width of the data

int	mHeight
	height of the data

Detailed Description

Parent class to compute the Fourier transforms based on several libraries Survey of FFT implementations: http://www.jjj.de/fft/fftpage.html Child classes specifically offer interface to.

FFTWCalculator : FFTW http://www.fftw.org/
KISSFFTCalculator : Kiss FFT http://sourceforge.net/projects/kissfft/

Constructor & Destructor Documentation

stira::fouriertools::FFTCalculator::FFTCalculator ( ArrayGrid< std::complex< double > > * pComplexGrid )

construct an FFT calculator initialized with and FFTBand

Parameters

pComplexGrid pointer to an ArrayGrid of complex values

Member Function Documentation

void stira::fouriertools::FFTCalculator::SwitchQuadrants ( ArrayGrid< std::complex< double > > * pGridIn )

Switches the four quadrants by mirroring them around the center of the image.

Parameters

pGridIn the grid of which the quadrants are to be switched (object itself is altered; no new object created)

References stira::imagedata::ArrayGrid< T >::GetValue(), and stira::imagedata::ArrayGrid< T >::SetValue().

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

fouriertools/fouriertools/FFTCalculator.h
fouriertools/fouriertools/FFTCalculator.cpp

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation