lti::opticalFlowLK Class Reference

This class computes the optical flow between two consecutive images according to the gradient based method of Lucas+Kanade. More...

#include <ltiOpticalFlowLK.h>

Inheritance diagram for lti::opticalFlowLK:

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Collaboration diagram for lti::opticalFlowLK:

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List of all members.

Classes
class	parameters
	the parameters for the class opticalFlowLK More...
Public Member Functions
	opticalFlowLK ()
	opticalFlowLK (const opticalFlowLK &other)
virtual	~opticalFlowLK ()
virtual const char *	getTypeName () const
void	apply (channel &at_t, channel &at_delta_t) const
void	apply (const channel &at_t, const channel &at_delta_t, channel &u, channel &v) const
opticalFlowLK &	copy (const opticalFlowLK &other)
virtual functor *	clone () const
const parameters &	getParameters () const

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Detailed Description

This class computes the optical flow between two consecutive images according to the gradient based method of Lucas+Kanade.

Optical flow is determined by the velocity components u, v, which are searched to complete the optical flow equation:

I(x+u*delta_t, y+v*delta_t, t+delta_t) = I(x,y,t) + e

I=intensity function, t=timeindex, x/y=coordinates, e=error

Theory and Algorithm: "Performance of Optical Flow Techniques", Barron+Fleet+Beauchemin, IEEE CVPR, 1992. "An iterative image registration technique with ...", Lucas+Kanade, DARPA IU Workshop, 1981.

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Constructor & Destructor Documentation

lti::opticalFlowLK::opticalFlowLK

(

)

default constructor

lti::opticalFlowLK::opticalFlowLK

(

const opticalFlowLK &

other

)

copy constructor

Parameters:

other

the object to be copied

virtual lti::opticalFlowLK::~opticalFlowLK

(

)

[virtual]

destructor

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Member Function Documentation

void lti::opticalFlowLK::apply	(	const channel &	at_t,
		const channel &	at_delta_t,
		channel &	u,
		channel &	v
	)			const

operates on a copy of the given parameters.

Parameters:

	at_t	channel with the source data at time index t.
	at_delta_t	channel with the source data at time index t+delta_t.
	u	is the x-component of the resulting optical flow.
	v	is the y-component of the resulting optical flow.

void lti::opticalFlowLK::apply	(	channel &	at_t,
		channel &	at_delta_t
	)			const

operates on the given parameter.

Parameters:

	at_t	channel with the source data at time index t. The x-component of the result (u) will be left here too.
	at_delta_t	channel with the source data at time index t+delta_t. The y-component of the result (v) will be left here too.

virtual functor* lti::opticalFlowLK::clone

(

)

const [virtual]

returns a pointer to a clone of this functor.

Implements lti::functor.

opticalFlowLK& lti::opticalFlowLK::copy

(

const opticalFlowLK &

other

)

copy data of "other" functor.

Parameters:

other

the functor to be copied

Returns:

a reference to this functor object

Reimplemented from lti::functor.

const parameters& lti::opticalFlowLK::getParameters

(

)

const

returns used parameters

Reimplemented from lti::transform.

virtual const char* lti::opticalFlowLK::getTypeName

(

)

const [virtual]

returns the name of this type ("opticalFlowLK")

Reimplemented from lti::transform.

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

• ltiOpticalFlowLK.h