Monitoring Human Activities: Flexible Calibration of a Wide Area System of Synchronized Cameras
نویسندگان
چکیده
This paper presents an efficient procedure for calibrating a wide area system of synchronized cameras with respect to a global coordinate system. The flexibility of this procedure lies in its use of a hand-held calibration target that is automatically detected in real-time by the system, and also in its capability to provide a feedback on the working volume coverage through a sampling pyramid. In a first stage, the intrinsic parameters are computed separately for each camera, and then the relative positions of the cameras are evaluated through a bundle adjustment. The 3D reconstruction uncertainty of the camera system is assessed locally within the working volume and is verified to be acceptable for monitoring hu-
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