1. Bahlmann, C., Zhu, Y., Ramesh, V., Pellkofer, M., Koehler, T.: A system for traffic sign detection, tracking, and recognition using color, shape, and motion information. In: Proceedings of the IEEE Intelligent Vehicles Symposium (IV 2005), IEEE Computer Society Press, Los Alamitos (2004)
2. Ballard, D., Brown, C.: Computer Vision. Prentice-Hall, Englewood Cliffs, New Jersey (1982)
3. Benallal, M., Meunier, J.: Real-time color segmentation of road signs. In: Proceedings of the Canadian Conference on Electrical and Computer Engineering (IEEE CCECE 2003), pp. 1823–1826 (2003)
4. Chutorian, M., Trivedi, M.M.: N-tree Disjoint-Set Forests for Maximally Stable Extremal Regions. In: Proceedings of the British Machine Vision Conference, Edinburgh, PA (September 2006)
5. de la Escalera, A., Moreno, L.: Road traffic sign detection and classification. IEEE Transactions on Industrial Electronics 44, 848–859 (1997)