Distributed Calibration of a Camera Sensor Network

Wireless camera sensor networks are finding potential applications in the areas of sensing and control. Such applications require the camera nodes of the network be calibrated precisely. This paper proposes a simple algorithm to perform distributed calibration of a camera sensor network that has been deployed in an unknown environment. The camera sensor nodes use their imaging abilities in collaboration with a cooperative moving target to determine their positions and orientations. The proposed algorithm requires simple arithmetic calculations and hence, it can be programmed on to low power processors. Its correctness, reliability and scalability for a large scale network have been validated by performing simulations using Player/Stage robotic simulations software. The algorithm has been implemented practically on a real time camera sensor network.