Electrical Engineering
      and Computer Sciences

Electrical Engineering and Computer Sciences

COLLEGE OF ENGINEERING

UC Berkeley

   

2009 Research Summary

CITRIC: A Low-bandwidth Wireless Camera Network Platform (CITRIC)

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Phoebus Wei-Chih Chen, Parvez Ahammad, Colby Boyer1, Shih-I Huang2, Leon Lin3, Edgar J. Lobaton, Marci Lenore Meingast, Songhwai Oh4, Simon Wang5, Posu Yan6, Allen Yang7, Chuohao Yeo, Lung-Chung Chang8, Doug Tygar, S. Shankar Sastry and Kirak Hong9

Army Research Office W911NF-06-1-0076 and TRUST/iCAST Academia Sinica 20071065

CITRIC is a wireless camera network system. The core component of this system is a new hardware platform that integrates a camera, a frequency-scalable (up to 624 MHz) CPU, 16 MB FLASH, and 64 MB RAM onto a single device. The device then connects with a standard sensor network mote to form a camera mote. The design enables in-network processing of images to reduce communication requirements, which has traditionally been high in existing camera networks with centralized processing. We also propose a back-end client/server architecture to provide a user interface to the system and support further centralized processing for higher-level applications. Our camera mote enables a wider variety of distributed pattern recognition applications than traditional platforms because it provides more computing power and tighter integration of physical components while still consuming relatively little power. Furthermore, the mote easily integrates with existing low-bandwidth sensor networks because it can communicate over the IEEE 802.15.4 protocol with other sensor network platforms.

We have developed and demonstrated the basic camera network system [1]. We are now refining the system and carrying out research on camera networks using this platform, including usage of the CITRIC mote to recognize and track targets in urban terrain (on the related project "Heterogeneous Sensor Webs for Automated Target Recognition and Tracking in Urban Terrain").

Figure 1
Figure 1: The CITRIC (Cal-ITRI Camera) Mote. This includes a custom made camera board and a commercially available Telos B mote.

[1]
P. W.-C. Chen, P. Ahammad, C. Boyer, S.-I. Huang, L. Lin, E. J. Lobaton, M. L. Meingast, S. Oh, S. Wang, P. Yan, A. Yang, C. Yeo, L.-C. Chang, J. D. Tygar, and S. S. Sastry, "CITRIC: A Low-Bandwidth Wireless Camera Network Platform," ACM/IEEE International Conference on Distributed Smart Cameras (ICDSC), September 2008.

1UC Berkeley
2Industrial Technology Research Institute (ITRI)
3Industrial Technology Research Institute (ITRI)
4UC Merced
5Industrial Technology Research Institute (ITRI)
6UC Berkeley
7UC Berkeley
8Industrial Technology Research Institute (ITRI)
9UC Berkeley/Yonsei University