data structure for FFT manipulations More...

#include <FFTBand.h>

Public Member Functions
	FFTBand (ArrayGrid< double > *pGrid, bool isreal=true)
	Constructor: build a complex band initialized by a real-valued grid. More...

	FFTBand (ArrayGrid< std::complex< double > > *pGrid)
	Constructor: build a complex band initialized by a complex-valued grid. More...

	FFTBand (int width, int height, std::complex< double > initValue=std::complex< double >(0.0, 0.0))
	Constructor: build a complex band initialized by zeros. More...

	FFTBand (FFTBand &otherFFTBand)
	Copy constructor.

	~FFTBand ()
	destructor

FFTBand *	Clone ()
	clones the current band

std::complex< double >	GetValue (int x, int y) const
	Get a value from the complex band. More...

void	SetValue (int x, int y, std::complex< double > complexValue)
	Set a value in the complex band using a complex data type from STL. More...

void	SetValue (int x, int y, double realValue, double imagValue)
	Set a value in the complex band using two double representing the real and imaginary part of the complex number. More...

int	GetWidth () const
	Get width of data grid.

int	GetHeight () const
	Get height of data grid.

void	ApplyForwardTransform ()
	Replaces the current FFTBand with a forward transformed one.

void	ApplyInverseTransform ()
	Replaces the current FFTBand with an inverse transformed one.

void	PointMirrorBand ()
	Mirrors the whole band around the center of the band Changes the original data structure (not creating a new one)

ArrayGrid< double > *	ConvertToRealGrid ()
	creates a real-valued ArrayGrid with the real component of the complex values in this FFTBand

ArrayGrid< double > *	ConvertToImaginaryGrid ()
	creates a real-valued ArrayGrid with the imaginary component of the complex values in this FFTBand

ArrayGrid< std::complex< double > > *	ConvertToComplexGrid ()
	creates a complex-valued ArrayGrid with the complex values in this FFTBand

void	ExportAbsImage (std::string fileName)
	export abs of current FFTBand to a PGM file More...

void	SwitchQuadrants ()
	switches upper left with lower right quadrant and lower left with upper right Changes the original data structure (not creating a new one)

void	Conjugate ()
	changes all complex grid values in their complex conjugate values Changes the original data structure (not creating a new one)

double	GetBandMaximum (FFTDataType type)
	gets maximum value of real or imaginary components in the band More...

double	GetBandMinimum (FFTDataType type)
	gets minimum value of real or imaginary components in the band More...

void	Multiply (FFTBand *other)
	multiplies this FFTBand point by point with another FFTBand More...

void	Multiply (ArrayGrid< double > *grid)
	multiplies this FFTBand point by point with an ArrayGrid More...

void	Multiply (std::complex< double > myFactor)
	multiplies this FFTBand point by point with a real-valued factor More...

void	Multiply (double myFactor)
	multiplies this FFTBand point by point with a complex-valued factor More...

Detailed Description

data structure for FFT manipulations

Constructor & Destructor Documentation

stira::fouriertools::FFTBand::FFTBand	(	ArrayGrid< double > *	pGrid,
		bool	isreal = `true`
	)

Constructor: build a complex band initialized by a real-valued grid.

Parameters

pGrid	grid to initialize this complex band with
isreal	flag if real-valued grid values should be used as the real components of the complex numbers (if false: use as imag components)

References stira::imagedata::ArrayGrid< T >::GetHeight(), and stira::imagedata::ArrayGrid< T >::GetWidth().

stira::fouriertools::FFTBand::FFTBand ( ArrayGrid< std::complex< double > > * pGrid )

Constructor: build a complex band initialized by a complex-valued grid.

Parameters

pGrid grid to initialize this complex band with

References stira::imagedata::ArrayGrid< T >::GetHeight(), and stira::imagedata::ArrayGrid< T >::GetWidth().

stira::fouriertools::FFTBand::FFTBand	(	int	width,
		int	height,
		std::complex< double >	initValue = `std::complex< double >( 0.0, 0.0 )`
	)

Constructor: build a complex band initialized by zeros.

Parameters

width	width of the band to construct
height	height of the band to construct
initValue	optional value to initialize this band with

Member Function Documentation

void stira::fouriertools::FFTBand::ExportAbsImage ( std::string fileName )

export abs of current FFTBand to a PGM file

Parameters

fileName name of PGM to export to

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

Referenced by stira::steerable::PyramidMaster< T >::ExtractB(), and stira::steerable::PyramidMaster< T >::ExtractB0().

double stira::fouriertools::FFTBand::GetBandMaximum ( FFTDataType type )

gets maximum value of real or imaginary components in the band

Parameters

type	real or imaginary component

double stira::fouriertools::FFTBand::GetBandMinimum ( FFTDataType type )

gets minimum value of real or imaginary components in the band

Parameters

type	real or imaginary component

complex< double > stira::fouriertools::FFTBand::GetValue	(	int	x,
		int	y
	)		const

Get a value from the complex band.

Parameters

x	x coordinate of the value to get
y	y coordinate of the value to get

Referenced by stira::fouriertools::FFT::ApplyTransferFunction(), stira::fouriertools::FFT::ApplyTransferFunctionFFT(), stira::fouriertools::FFT::ComputePowerSpectrum(), stira::fouriertools::FFT::Convolve(), FFTBand(), Multiply(), PointMirrorBand(), stira::deconvolve::TikhonovMillerDeconvolve::Run(), stira::deconvolve::WienerDeconvolve::RunSingleband(), stira::steerable::PyramidMaster< T >::ViewTransferFunction(), stira::fouriertools::FFT::WriteFFTDataToPPM(), and stira::deconvolve::WienerDeconvolve::~WienerDeconvolve().

void stira::fouriertools::FFTBand::Multiply ( FFTBand * other )

multiplies this FFTBand point by point with another FFTBand

Parameters

other the other FFTBand

Warning: works directly on the band data; original data is lost

References GetValue().

Referenced by stira::steerable::PyramidMaster< T >::ExtractB(), stira::steerable::PyramidMaster< T >::ExtractB0(), stira::steerable::PyramidMaster< T >::ReconstructB(), stira::steerable::PyramidMaster< T >::ReconstructB0(), and stira::steerable::PyramidMaster< T >::ReconstructL0().

void stira::fouriertools::FFTBand::Multiply ( ArrayGrid< double > * grid )

multiplies this FFTBand point by point with an ArrayGrid

Parameters

grid	the ArrayGrid

Warning: works directly on the band data; original data is lost

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

void stira::fouriertools::FFTBand::Multiply ( std::complex< double > myFactor )

multiplies this FFTBand point by point with a real-valued factor

Parameters

myFactor factor to multiply every value in the grid with

Warning: works directly on the band data; original data is lost

void stira::fouriertools::FFTBand::Multiply ( double myFactor )

multiplies this FFTBand point by point with a complex-valued factor

Parameters

myFactor factor to multiply every value in the grid with

Warning: works directly on the band data; original data is lost

void stira::fouriertools::FFTBand::SetValue	(	int	x,
		int	y,
		std::complex< double >	complexValue
	)

Set a value in the complex band using a complex data type from STL.

Parameters

x	x coordinate of the value to set
y	y coordinate of the value to set
complexValue	the value to set

Referenced by stira::fouriertools::FFT::ApplyTransferFunction(), stira::fouriertools::FFT::ApplyTransferFunctionFFT(), stira::fouriertools::FFT::Convolve(), stira::fouriertools::TransferFunctionGenerator::GenerateOrientedTransferFunction(), stira::fouriertools::TransferFunctionGenerator::HighFrequencyCrossMask(), stira::deconvolve::TikhonovMillerDeconvolve::Run(), stira::deconvolve::WienerDeconvolve::RunSingleband(), and stira::steerable::PyramidMaster< T >::SumFFTBands().

void stira::fouriertools::FFTBand::SetValue	(	int	x,
		int	y,
		double	realValue,
		double	imagValue
	)

Set a value in the complex band using two double representing the real and imaginary part of the complex number.

Parameters

x	x coordinate of the value to set
y	y coordinate of the value to set
realValue	real part of the complex number to set
imagValue	imaginary part of the complex number to set

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

fouriertools/fouriertools/FFTBand.h
fouriertools/fouriertools/FFTBand.cpp

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation