1. Google goggles.
https://support.google.com/websearch/topic/25275
2. Vuforia.
https://www.vuforia.com/
3. Flow.
http://www.a9.com/whatwedo/mobile-technology/flow-powered-by-amazon/
4. Jing, Y., Baluja, S.: Pagerank for product image search. In: 17th International World Wide Web Conference (IW3C2), pp. 307–316. ACM, Beijing (2008)
5. Tsai, S.S., Chen, D., Chandrasekhar, V., Takacs, G., Cheung, N.M., Vedantham, R., Grzeszczuk, R., Girod, B.: Mobile product recognition. In: International Conference on Multimedia, pp. 1587–1590. ACM, Firenze (2010)