latest version v1.9 - last update 24 Nov 2005

lti::temporalTemplate Class Reference

This functor implements temporal templates, as described by James Davis and Aaron Bobick in "The Representation and Recognition of Action Using Temporal Templates", MIT Media Lab, Tech. More...

#include <ltiTemporalTemplate.h>

Inheritance diagram for lti::temporalTemplate:

[legend]Collaboration diagram for lti::temporalTemplate:

[legend]List of all members.

Public Member Functions
	temporalTemplate ()
	temporalTemplate (const temporalTemplate &other)
virtual	~temporalTemplate ()
virtual const char *	getTypeName () const
void	reset ()
bool	apply (channel &srcdest)
bool	apply (const image &src, channel &dest)
bool	apply (const channel &src, channel &dest)
bool	apply (const channel8 &src, channel &dest)
temporalTemplate &	copy (const temporalTemplate &other)
virtual functor *	clone () const
const parameters &	getParameters () const
Protected Member Functions
float	difference (channel &newChannel, channel &diff)
float	difference (channel8 &newChannel, channel &diff)
float	difference (image &newImage, channel &diff)
void	accumulate (channel &diff, const float &threshold)
Protected Attributes
channel	lastChannel
channel8	lastChannel8
image	lastImage
channel	mhi
Classes
class	parameters
	the parameters for the class temporalTemplate More...

---

Detailed Description

This functor implements temporal templates, as described by James Davis and Aaron Bobick in "The Representation and Recognition of Action Using Temporal Templates", MIT Media Lab, Tech.

Report 402, IEEE Conference on Computer Vision and Pattern Recognition (CVPR'97) The apply()-methods return the calculated Motion-History-Image coded in a channel, where the value 1.0 means there was motion between the last two images.

---

Constructor & Destructor Documentation

lti::temporalTemplate::temporalTemplate (   )

default constructor

lti::temporalTemplate::temporalTemplate (  const temporalTemplate &  other  )

copy constructor Parameters: other  the object to be copied

virtual lti::temporalTemplate::~temporalTemplate (   )  [virtual]

destructor

---

Member Function Documentation

void lti::temporalTemplate::accumulate (  channel &  diff, const float &  threshold )  [protected]

accumulate the given difference image in the MHI. Diff will contain the same value as mhi after calling this member.

bool lti::temporalTemplate::apply (  const channel8 &  src, channel &  dest )

operates on a copy of the given parameters. Parameters: src  channel8 with the source data. dest  channel8 where the result will be left. Returns: true if successful, false otherwise Please note that all considered images MUST have the same size, otherwise your previous information will be lost. The first images will determine the used image size. You can restart with another size using reset().

bool lti::temporalTemplate::apply (  const channel &  src, channel &  dest )

operates on a copy of the given parameters. Parameters: src  channel with the source data. dest  channel where the result will be left. Returns: true if successful, false otherwise Please note that all considered images MUST have the same size, otherwise your previous information will be lost. The first images will determine the used image size. You can restart with another size using reset().

bool lti::temporalTemplate::apply (  const image &  src, channel &  dest )

operates on a copy of the given parameters. Parameters: src  image with the source data. dest  image where the result will be left. Returns: true if successful, false otherwise Please note that all considered images MUST have the same size, otherwise your previous information will be lost. The first images will determine the used image size. You can restart with another size using reset().

bool lti::temporalTemplate::apply (  channel &  srcdest  )

operates on the given parameter. Parameters: srcdest  channel with the source data. The result will be left here too. Returns: true if successful, false otherwise Please note that all considered images MUST have the same size, otherwise your previous information will be lost. The first image will determine the used image size. You can restart with another size using reset().

virtual functor* lti::temporalTemplate::clone (   )  const [virtual]

returns a pointer to a clone of this functor. Implements lti::functor.

temporalTemplate& lti::temporalTemplate::copy (  const temporalTemplate &  other  )

copy data of "other" functor. Parameters: other  the functor to be copied Returns: a reference to this functor object

float lti::temporalTemplate::difference (  image &  newImage, channel &  diff )  [protected]

calculates the difference image. The given image will substitute the lastChannel, and at the end will be empty() returns the threshold to be used.

float lti::temporalTemplate::difference (  channel8 &  newChannel, channel &  diff )  [protected]

calculates the difference image. The given image will substitute the lastChannel, and at the end will be empty() returns the threshold to be used.

float lti::temporalTemplate::difference (  channel &  newChannel, channel &  diff )  [protected]

calculates the difference image. The given image will substitute the lastChannel, and at the end will be empty() returns the threshold to be used.

const parameters& lti::temporalTemplate::getParameters (   )  const

returns used parameters Reimplemented from lti::transform.

virtual const char* lti::temporalTemplate::getTypeName (   )  const [virtual]

returns the name of this type ( "temporalTemplate" ) Reimplemented from lti::transform.

void lti::temporalTemplate::reset (   )

reset the internal accumulators, so that the next apply will be considered as the first image to detect motion

---

Member Data Documentation

channel lti::temporalTemplate::lastChannel [protected]

the last channel, required to calculate D(x,y,t)

channel8 lti::temporalTemplate::lastChannel8 [protected]

the last channel8, required to calculate D(x,y,t)

image lti::temporalTemplate::lastImage [protected]

the last image, required to calculate D(x,y,t)

channel lti::temporalTemplate::mhi [protected]

The Motion History Image.

---

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

• ltiTemporalTemplate.h

---