Method and system for measurement of the duration an area is...

Details Method and system for measurement of the duration an area is... Method and system for measurement of the duration an area is...

G - Physics

06

T

G06T 7/60 (2006.01)

Patent

CA 2454297

A system and method for calculation of the duration a target area included within an image stream utilizes a three-dimensional model of at least one target area within a site. A counter is incremented during periods, for example on a frame-by-frame basis, when the target area is included in the image stream. An occlusion parameter is calculated for adjusting the calculated duration that the target area is included within the image stream. The occlusion parameter facilitates accounting for variations in a target area obstruction and is used for making adjustments to a counter so that a count indicative of a duration reflects variations in obstructions of the target area. A foreground parameter associated with target area is calculated for adjusting the calculated duration of the target area. The foreground parameter facilitates accounting for variations in the viewability of an image included within the target area resulting from various camera zooms.

L'invention porte sur un système et un procédé de calcul de la durée d'une zone cible incluse dans une suite d'images, ce procédé utilisant un modèle tridimensionnel d'au moins une zone cible dans un site. Un compteur est incrémenté sur des périodes, par exemple, sur une base trame par trame, lorsque la zone cible est incluse dans la suie d'images. Un paramètre d'occlusion est calcul pour ajuster la durée calculée indiquant que la zone cible est incluse dans la suite d'images. Le paramètre d'occlusion facilite la comptabilisation des variations dans une obstruction de zone cible et est utilisé pour faire des ajustements sur un compteur de sorte qu'un nombre indiquant une durée soit le reflet des variations d'obstructions de la zone cible. Un paramètre prioritaire associé à une zone cible est calcul pour ajuster la durée calculée de la zone cible. Le paramètre prioritaire facilite la comptabilisation des variations de la représentation d'une image incluse dans la zone cible obtenue par diverses caméras à focale variable.

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