camera localization in distributed networks using trajectory estimation
;Nadeem Anjum
Molecular diversity2011Vol. 2011pp. -
188
anjum2011journalcamera
Abstract
This paper presents an algorithm for camera localization
using trajectory estimation (CLUTE) in a distributed
network of nonoverlapping cameras. The algorithm recovers the
extrinsic calibration parameters, namely, the relative position and
orientation of the camera network on a common ground plane
coordinate system. We first model the observed trajectories in
each camera's field of view using Kalman filtering, then we use
this information to estimate the missing trajectory information
in the unobserved areas by fusing the results of a forward and
backward linear regression estimation from adjacent cameras.
These estimated trajectories are then filtered and used to recover
the relative position and orientation of the cameras by analyzing
the estimated and observed exit and entry points of an object in
each camera's field of view. The final configuration of the network
is established by considering one camera as a reference and by
adjusting the remaining cameras with respect to this reference.
We demonstrate the algorithm on both simulated and real data
and compare the results with state-of-the-art approaches. The
experimental results show that the proposed algorithm is more
robust to noisy and missing data and in case of camera failure.