1. Rohs, M., Gfeller, B.: Using camera-equipped mobile phones for interacting with real-world objects. In: Ferscha, A., Hoertner, H., Kotsis, G. (eds.) Advances in Pervasive Computing, Vienna, Austria, pp. 265–271. Austrian Computer Society, OCG (2004)
2. Rekimoto, J., Ayatsuka, Y.: CyberCode: Designing augmented reality environments with visual tags. In: DARE 2000: Proceedings of DARE 2000 on Designing augmented reality environments, pp. 1–10. ACM Press, New York (2000)
3. de Ipiña, D.L., Mendonça, P.R.S., Hopper, A.: TRIP: A low-cost vision-based location system for ubiquitous computing. Personal Ubiquitous Comput. 6, 206–219 (2002)
4. Siio, I., Masui, T., Fukuchi, K.: Real-world interaction using the FieldMouse. In: UIST 1999: Proceedings of the 12th annual ACM symposium on User interface software and technology, pp. 113–119. ACM Press, New York (1999)
5. Madhavapeddy, A., Scott, D., Sharp, R., Upton, E.: Using camera-phones to enhance human-computer interaction. In: Sixth International Conference on Ubiquitous Computing (Adjunct Proceedings: Demos) (2004)