Next: Geo-Sensing Using Ground Up: Active Perception Previous: Active Perception

Optimal Observation with Vision Systems

Authors: [tex2html_wrap4154]K. Benameur, P.R.Bélanger

Investigator username: belanger

Category: perception

Subcategory: active perception

In this theoretical investigation, we consider the problem of estimating the state of a moving object, whose motion is described by a set of state equations. The observation equation is a nonlinear map between the position state variables of the object and the position on the plane of a camera(s). This mapping depends on variables such as: camera position and orientation, lens position, zoom action. Given a known time variation of these quantities, the observation equation is a known, time-varying function. The variance of the measurement error is also a function the state and the camera variables, hence time-varying for a given time profile of the camera variables. In that case, the state can be estimated with an extended Kalman filter. The observation can be optimised by solving the following problem: given an expected state trajectory, find the time history of camera variables that will minimize some function of the covariance of the state estimation error.