1. Group, G.: 2006 Press Releases. November 2 (2006), http://www.gartner.com/it/page.jsp?id=498310
2. Rohs, M., Gfeller, B.: Using camera-equipped mobile phones for interacting with real-world objects. In: Advances in Pervasive Computing, pp. 265–271. Austrian Computer Society (OCG), Austria (2004)
3. Yeh, T., Grauman, K., Tollmar, K., Darrell, T.: A picture is worth a thousand keywords: image-based object search on a mobile platform. In: CHI 2005: CHI 2005 extended abstracts on Human factors in computing systems, pp. 2025–2028. ACM, New York (2005)
4. Robertsone, D., Cipolla, R.: An image-based system for urban navigation. In: The 15th British Machine Vision Conference (BMVC 2004), pp. 819–828 (2004)
5. Swain, M.J., Ballard, D.H.: Color indexing, vol. 7(1), pp. 11–32. Kluwer Academic Publishers, Hingham (1991)