1. Y. Yagi, S. Kawato and S. Tsuji: “Collision Avoidance for Mobile Robot with Omnidirectional Image Sensor (COPIS)”, Proceedings IEEE the International Conference on Robotics and Automation, Vol. 1, pp. 910–915, 1991
2. A. Clerentin, L. Delahoche, E. Brassart: “Cooperation between two omnidirectional perception systems for mobile robot localization”, Proceedings of the 2000 IEEE/RSJ Intemational Conference on Intelligent Robots and Systems, pp. 1499–1504, 2000
3. N. Mori et al.: “Realization of Soccer Game with Small Size Robots which have Omni-directional Mobile Mechanism and Omni-directional Vision — Strategies of Team OMNI—”(in Japanese), Proceedings of the 6th SIG-Challenge of Japanese Society for Artificial Intelligence, pp. 42–47, 2000
4. D. Sekimori et al.: “High-speed Obstacle Avoidance of Mobile Robot Based on Labeling of Omni-directional Image”(in Japanese), Proceedings of the 18th Annual Conference of the Robotics Society of Japan, Vol. 3,pp. 995–996, 2000
5. Mark de Berg et al.: “Computational Geometry: Algorithms and Applications”, Springer-Verlag, 2000