SYSTEM AND METHOD FOR LOCATING A TARGET WITH A NETWORK OF CAMERAS
First Claim
1. A method for tracking at least one target using a network of intelligent cameras, each comprising data processing resources implementing at least one algorithm for tracking a target or targets, image acquisition resources and communication resources, the network of cameras covering at least one geographic area, called the region, comprising detection of at least one target in the region, by at least one camera in the network, based on execution of at least one detection algorithm, followed by, for each instant (t), an iteration of at least one tracking operation of the target by at least one camera, called the active camera, thanks to at least one variational filtering algorithm based on a variational filter, using a likelihood function for the position of the target in the image acquired by said active camera and using a model, called a transition model, represented by a continuous mixture of Gaussians and based on a temporal correlation of a trajectory of the target from one instant to another, by implementing estimation of the position of the target by a probability density.
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Abstract
The present invention relates to a system, a method and an intelligent camera for following at least one target (X) with at least one intelligent camera (S) comprising means (S1) for processing data implementing at least one algorithm (AS, AD, AF) for following target(s), means (S2) for acquiring images and means (S21) for communication, characterized in that a detection of at least one target (X) in the region (Z) covered, by virtue of at least one algorithm (AD) for detection at an initial instant, is followed, for each instant (t), by an iteration of at least one step of following the target (X) with at least one camera, termed an active camera, by virtue of at least one variational filtering algorithm (AF) based on a variational filter by estimation (551) of the position of the target (X) through a continuous mixture of Gaussians.
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20 Claims
- 1. A method for tracking at least one target using a network of intelligent cameras, each comprising data processing resources implementing at least one algorithm for tracking a target or targets, image acquisition resources and communication resources, the network of cameras covering at least one geographic area, called the region, comprising detection of at least one target in the region, by at least one camera in the network, based on execution of at least one detection algorithm, followed by, for each instant (t), an iteration of at least one tracking operation of the target by at least one camera, called the active camera, thanks to at least one variational filtering algorithm based on a variational filter, using a likelihood function for the position of the target in the image acquired by said active camera and using a model, called a transition model, represented by a continuous mixture of Gaussians and based on a temporal correlation of a trajectory of the target from one instant to another, by implementing estimation of the position of the target by a probability density.
Specification