lti::shiftInvariance Class Reference

This functor takes a vector, which is supposed to be periodic, and generates a second "normalized" shifted one. More...

#include <ltiShiftInvariance.h>

Inheritance diagram for lti::shiftInvariance:

[legend]

Collaboration diagram for lti::shiftInvariance:

[legend]

List of all members.

Classes
class	parameters
	the parameters for the class shiftInvariance More...
Public Member Functions
	shiftInvariance ()
	shiftInvariance (const shiftInvariance &other)
virtual	~shiftInvariance ()
virtual const char *	getTypeName () const
bool	apply (dvector &srcdest) const
bool	apply (const dvector &src, dvector &dest) const
bool	apply (const dvector &src, dvector &dest, int &shft) const
shiftInvariance &	copy (const shiftInvariance &other)
virtual functor *	clone () const
const parameters &	getParameters () const

---

Detailed Description

This functor takes a vector, which is supposed to be periodic, and generates a second "normalized" shifted one.

It uses different modi.

This first one uses the property of the fourier transform to represent a vector "shift" as the addition of a factor k*w (w=2*Pi*f) to the phase of its representation in the frecuency space. To get rid of this term, the phase is twice derived, and the result is subracted from the first order derivative. This resulting vector should represent a constant value k, but due to the phase "discontinuities" is not the case. The average of the vector values which lie in a given tolerance interval will be used to calculate the shift.

This hasn't beed documented anywere

The second one calculates and centers the first momentum of the cyclic vector at the position 0

---

Constructor & Destructor Documentation

lti::shiftInvariance::shiftInvariance

(

)

default constructor

lti::shiftInvariance::shiftInvariance

(

const shiftInvariance &

other

)

copy constructor

Parameters:

other

the object to be copied

virtual lti::shiftInvariance::~shiftInvariance

(

)

[virtual]

destructor

---

Member Function Documentation

bool lti::shiftInvariance::apply	(	const dvector &	src,
		dvector &	dest,
		int &	shft
	)			const

operates on a copy of the given parameters.

Parameters:

	src	dvector with the source data.
	dest	dvector where the result will be left.
	shft	will contain the number of elements the vector was shifted

Returns:

true if apply successful or false otherwise.

bool lti::shiftInvariance::apply	(	const dvector &	src,
		dvector &	dest
	)			const

operates on a copy of the given parameters.

Parameters:

	src	dvector with the source data.
	dest	dvector where the result will be left.

Returns:

true if apply successful or false otherwise.

bool lti::shiftInvariance::apply

(

dvector &

srcdest

)

const

operates on the given parameter.

Parameters:

srcdest

dvector with the source data. The result will be left here too.

Returns:

true if apply successful or false otherwise.

virtual functor* lti::shiftInvariance::clone

(

)

const [virtual]

returns a pointer to a clone of this functor.

Reimplemented from lti::globalFeatureExtractor.

shiftInvariance& lti::shiftInvariance::copy

(

const shiftInvariance &

other

)

copy data of "other" functor.

Parameters:

other

the functor to be copied

Returns:

a reference to this functor object

Reimplemented from lti::globalFeatureExtractor.

const parameters& lti::shiftInvariance::getParameters

(

)

const

returns used parameters

Reimplemented from lti::globalFeatureExtractor.

virtual const char* lti::shiftInvariance::getTypeName

(

)

const [virtual]

returns the name of this type ("shiftInvariance")

Reimplemented from lti::globalFeatureExtractor.

---

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

• ltiShiftInvariance.h