BIAS::FFT2D_free< StorageType > Class Template Reference

Wrapper to the fftpack library from netlib (see fftpack/fft.c), implementing the fft (Fast Fourier Transform) for images. More...

#include <Image/FFT2D_free.hh>

Public Member Functions
	FFT2D_free ()
void	Forward (const Image< StorageType > &in, Image< float > &ComplexOut)
	apply FFT on More...
void	GetMagnitude (const Image< float > &ComplexIn, Image< float > &value)
	take the spectrum image (2-channel) and compute the absolute value for each pixel More...
void	Init (int sizex, int sizey)
void	Normalize (Image< float > &Image)
	apply normalisation on spectrum image, which is float-type More...
void	Reverse (const Image< float > &ComplexIn, Image< StorageType > &res)
virtual	~FFT2D_free ()

Protected Member Functions
void	ComplexColumnToWorkArray1_ (const Image< float > &ComplexImg, unsigned int col)
void	ComplexRowToWorkArray0_ (const Image< float > &ComplexImg, unsigned int row)
void	WorkArray0ToComplexRow_ (Image< float > &ComplexImg, unsigned int row)
void	WorkArray1ToComplexColumn_ (Image< float > &ComplexImg, unsigned int col)

Protected Attributes
unsigned long long int	Normalize_
float *	TmpArray0_
float *	TmpArray1_
long int	TmpArraySize0_
long int	TmpArraySize1_
float *	WorkArray0_
float *	WorkArray1_
long int	WorkSize0_
long int	WorkSize1_

Detailed Description

template<class StorageType>
class BIAS::FFT2D_free< StorageType >

Wrapper to the fftpack library from netlib (see fftpack/fft.c), implementing the fft (Fast Fourier Transform) for images.

This is a replacement for FFT2D which is usable under the GPL.

Author

evers

Date

2009

Examples:

ExampleFFT2D_free.cpp.

Definition at line 42 of file FFT2D_free.hh.

Constructor & Destructor Documentation

template<class StorageType >

FFT2D_free::FFT2D_free

(

)

Definition at line 12 of file FFT2D_free.cpp.

template<class StorageType >

FFT2D_free::~FFT2D_free ( )

virtual

Definition at line 24 of file FFT2D_free.cpp.

Member Function Documentation

template<class StorageType >

void FFT2D_free::ComplexColumnToWorkArray1_ ( const Image< float > &  ComplexImg, unsigned int  col  )

protected

Definition at line 71 of file FFT2D_free.cpp.

References BIAS::ImageBase::GetHeight(), and BIAS::Image< StorageType >::GetImageDataArray().

template<class StorageType >

void FFT2D_free::ComplexRowToWorkArray0_ ( const Image< float > &  ComplexImg, unsigned int  row  )

protected

Definition at line 84 of file FFT2D_free.cpp.

References BIAS::Image< StorageType >::GetImageDataArray(), and BIAS::ImageBase::GetWidth().

template<class StorageType >

void FFT2D_free::Forward	(	const Image< StorageType > &	in,
		Image< float > &	ComplexOut
	)

apply FFT on

Parameters

in,result

is 2-channel image with real an img. Result ist _not_normalized.

Definition at line 120 of file FFT2D_free.cpp.

References BIAS::ImageBase::GetChannelCount(), BIAS::ImageBase::GetHeight(), BIAS::Image< StorageType >::GetImageDataArray(), BIAS::ImageBase::GetWidth(), and BIAS::Image< StorageType >::Init().

template<class StorageType >

void FFT2D_free::GetMagnitude	(	const Image< float > &	ComplexIn,
		Image< float > &	value
	)

take the spectrum image (2-channel) and compute the absolute value for each pixel

Definition at line 197 of file FFT2D_free.cpp.

References BIAS::ImageBase::GetHeight(), BIAS::Image< StorageType >::GetImageData(), BIAS::ImageBase::GetWidth(), BIAS::Image< StorageType >::Init(), BIAS::ImageBase::IsEmpty(), and BIAS::Image< StorageType >::Release().

template<class StorageType >

void FFT2D_free::Init	(	int	sizex,
		int	sizey
	)

Definition at line 32 of file FFT2D_free.cpp.

template<class StorageType >

void FFT2D_free::Normalize

(

Image< float > &

Image

)

apply normalisation on spectrum image, which is float-type

Definition at line 184 of file FFT2D_free.cpp.

References BIAS::ImageBase::GetChannelCount(), BIAS::ImageBase::GetHeight(), BIAS::Image< StorageType >::GetImageData(), and BIAS::ImageBase::GetWidth().

template<class StorageType >

void FFT2D_free::Reverse	(	const Image< float > &	ComplexIn,
		Image< StorageType > &	res
	)

Definition at line 154 of file FFT2D_free.cpp.

References BIAS::ImageBase::GetHeight(), BIAS::Image< StorageType >::GetImageDataArray(), BIAS::ImageBase::GetWidth(), and BIAS::Image< StorageType >::Init().

template<class StorageType >

void FFT2D_free::WorkArray0ToComplexRow_ ( Image< float > &  ComplexImg, unsigned int  row  )

protected

Definition at line 96 of file FFT2D_free.cpp.

References BIAS::Image< StorageType >::GetImageDataArray(), and BIAS::ImageBase::GetWidth().

template<class StorageType >

void FFT2D_free::WorkArray1ToComplexColumn_ ( Image< float > &  ComplexImg, unsigned int  col  )

protected

Definition at line 106 of file FFT2D_free.cpp.

References BIAS::ImageBase::GetHeight(), and BIAS::Image< StorageType >::GetImageDataArray().

Member Data Documentation

template<class StorageType>

unsigned long long int BIAS::FFT2D_free< StorageType >::Normalize_

protected

Definition at line 77 of file FFT2D_free.hh.

template<class StorageType>

float* BIAS::FFT2D_free< StorageType >::TmpArray0_

protected

Definition at line 75 of file FFT2D_free.hh.

template<class StorageType>

float * BIAS::FFT2D_free< StorageType >::TmpArray1_

protected

Definition at line 75 of file FFT2D_free.hh.

template<class StorageType>

long int BIAS::FFT2D_free< StorageType >::TmpArraySize0_

protected

Definition at line 76 of file FFT2D_free.hh.

template<class StorageType>

long int BIAS::FFT2D_free< StorageType >::TmpArraySize1_

protected

Definition at line 76 of file FFT2D_free.hh.

template<class StorageType>

float* BIAS::FFT2D_free< StorageType >::WorkArray0_

protected

Definition at line 74 of file FFT2D_free.hh.

template<class StorageType>

float * BIAS::FFT2D_free< StorageType >::WorkArray1_

protected

Definition at line 74 of file FFT2D_free.hh.

template<class StorageType>

long int BIAS::FFT2D_free< StorageType >::WorkSize0_

protected

Definition at line 73 of file FFT2D_free.hh.

template<class StorageType>

long int BIAS::FFT2D_free< StorageType >::WorkSize1_

protected

Definition at line 73 of file FFT2D_free.hh.

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

• Image/FFT2D_free.hh
• Image/FFT2D_free.cpp