lti::opticalFlowHS Class Reference

Computes the optical flow between two consecutive images according to Horn-Schunks gradient based method. More...

#include <ltiOpticalFlowHS.h>

Inheritance diagram for lti::opticalFlowHS:

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Collaboration diagram for lti::opticalFlowHS:

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List of all members.

Classes
class	parameters
	the parameters for the class opticalFlowHS More...
Public Member Functions
	opticalFlowHS ()
	opticalFlowHS (const opticalFlowHS &other)
virtual	~opticalFlowHS ()
virtual const char *	getTypeName () const
void	apply (channel &ch_t0_u, channel &ch_t1_v) const
void	apply (const channel &ch_t0, const channel &ch_t1, channel &u, channel &v) const
opticalFlowHS &	copy (const opticalFlowHS &other)
virtual functor *	clone () const
const parameters &	getParameters () const

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Detailed Description

Computes the optical flow between two consecutive images according to Horn-Schunks gradient based method.

Optical flow is determined by 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: "The Computation of Optical Flow", Beauchemin & Barron, ACM Computing Surveys, Vol.27 No. 3

Algorithm: "Computer Vision", Klette, Schluens & koschan, Springer, pp.190

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Constructor & Destructor Documentation

lti::opticalFlowHS::opticalFlowHS

(

)

default constructor

lti::opticalFlowHS::opticalFlowHS

(

const opticalFlowHS &

other

)

copy constructor

Parameters:

other

the object to be copied

virtual lti::opticalFlowHS::~opticalFlowHS

(

)

[virtual]

destructor

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Member Function Documentation

void lti::opticalFlowHS::apply	(	const channel &	ch_t0,
		const channel &	ch_t1,
		channel &	u,
		channel &	v
	)			const

operates on a copy of the given parameters.

Parameters:

	ch_t0	channel at timeindex 0.
	ch_t1	channel at timeindex 1. Note that ch_t0 is the predecessor of ch_t1.
	u	x component of flowfield
	v	y component of flowfield

void lti::opticalFlowHS::apply	(	channel &	ch_t0_u,
		channel &	ch_t1_v
	)			const

operates on the given parameter.

Parameters:

	ch_t0_u	channel at timeindex 0.
	ch_t1_v	channel at timeindex 1. Note that ch_t0 is the predecessor of ch_t1. u,v (x,y components of flowfield) are returned in ch_t0_u, ch_t1_v

virtual functor* lti::opticalFlowHS::clone

(

)

const [virtual]

returns a pointer to a clone of this functor.

Implements lti::functor.

opticalFlowHS& lti::opticalFlowHS::copy

(

const opticalFlowHS &

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::opticalFlowHS::getParameters

(

)

const

returns used parameters

Reimplemented from lti::transform.

virtual const char* lti::opticalFlowHS::getTypeName

(

)

const [virtual]

returns the name of this type ("opticalFlowHS")

Reimplemented from lti::transform.

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

• ltiOpticalFlowHS.h