The introduction of video sensors into a sensor network allows existing sensor network applications to be enhanced as well as providing for new applications which cannot be supported by typical scalar sensor networks. This is due to the vast amount of information which can be obtained from an image. Scalar data is insufficient for many applications such as video surveillance and traffic monitoring. Whereas, camera sensors collect video data, which are rich in information and offer tremendous potential when used in wireless sensor networks. Video sensor networks continue to gain increase interest due to their ability to collect video information for a wide range of applications in recent years. However, knowledge about these types of networks is mostly related to visual algorithms, leaving the issues such as the coverage of video sensor network and the transmission of video data aside. In this paper, we first highlight the issues and opportunities of video sensor network. And then we discuss key research issue on video sensor network, specifically camera coverage problem, network architecture, and low-power video data processing and communication. Finally, we identify enabling approaches in this area.

1. Akyildiz IF, Su w, Sankarasubramaniam Y, Cayirci E. Wireless sensor networks: A survey. Computer Networks, 2002,38(4) : 393-422
2. Sun LM, Li JZ, Chen Y, Zhu HS. Wireless Sensor network. Beijing: Tsinghua university Press, 2005(in Chinese)
3. Li JZ, Li JB, Shi SF. Concepts, issues and advance of sensor networks and data management of sensor networks. Journal of Software, 2003,14(10) : 1717-1727
4. Ren FY, Huang HN, Lin C. Wireless sensor networks . Journal of Software,2003,14(7) : 1282-1291
5. Chong C. and Kumar,S(2003) Sensor networks evolution, opportunities, and challenges. Proceedings of the IEEE, August, vol. 91,no. 8
6. Zhang DM, HD Ma, Liu L, Tao D. An approach to environment adaptive application reconfiguration in sensor network. Proc. of the In!' I Conf. on Mobile Ad-hoc and Sensor Networks
7. Cucchiara R. Multimedia surveillance systems. In : Aggarwal JK, Cucchiara R, Chang E, Wang YF, eds. Proc. of the ACM VSSN 2005. New York: ACM Press 2005 1-10
8. Ma HD, Liu YH. Correlation based video processing in video sensor networks. In : Proc of the IEEE WirelessCom 2005. IEEE Press,2005 987-992
9. DeBardelaben JA. Multimedia sensor networks for ISR applications. 2003. 2009-2012
10. Kulkarrni P, Ganesan D, Shenoy P, Liu QF. SensEye : A multi-tier camera sensor network. In : Zhang HJ, Chua T-S,eds. Proc. of the 13th Annual ACM international Conference on Multimedia'05. New York: ACM Press, 2005. 229-238
11. Feng W , Code B : A Scalable architecture for video sensor networking applications In : Rowe L, Yin H, eds. Proc of the ACM In!'1 Conf. on Multimedia 2003. New York : ACM Press 2003. 151-167
12. Gao Y, Wu K, Li F. Analysis on the redundancy of wireless sensor networks. In : Proc of the 2nd ACM In!'1 Workshop on Wireless Sensor Networks and Applications(WSNA). New York: ACM
13. Chow, K. -Y. , Lui, K. -S. , & Lam, E. Y. (2009). Wireless sensor networks scheduling for full angle coverage. Multidimensional Systems and Signal Processing. doi:10. 1007/s11045-008-0062-3.
14. Czarlinska, A. , & Kundur, D. (2009). Wireless image sensor networks: Event acquisition in attackprone and uncertain environments. Multidimensional Systems and Signal Processing. doi:10. 1007/ s11045-008-0071-2.

Wireless Sensor Network Video Sensor Network Key Issue Camera Coverage