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SearchLight - A Lightweight Search Function for Pervasive Environments

Andreas Butz; Michael Schneider; Lübomira Spassova
In: Alois Ferscha; Friedemann Mattern (Hrsg.). Proceedings of the Second International Conference on Pervasive Computing. International Conference on Pervasive Computing (Pervasive), April 21-23, Vienna, Austria, Pages 351-356, Lecture Notes in Computer Science (LNCS), Vol. 3001/2004, ISBN 3-540-21835-1, Springer, Berlin, Heidelberg, 2004.


We present a lightweight search function for physical objects in instrumented environments. Objects are tagged with optical markers which are scanned by a steerable camera and projector unit on the ceiling. The same projector can then highlight the objects when given the corresponding marker ID. The process is very robust regarding calibration, and no 3D model of the environment is needed. We discuss the scenario of finding books in a library or office environment and several extensions currently under development.

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