Wireless sensor networks: seamless computing across the physical and digital worlds

摘要

It is our great pleasure to welcome you to the 2nd ACM Workshop on Video Surveillance & Sensor Networks - VSSN'04. With the proliferation of inexpensive cameras (optical sensors) and non-optical (e.g., electrical, thermal, and biological) sensing devices, and the deployment of high-speed, wired/wireless networks, it has become economically and technically feasible to employ a large number of sensing devices for applications such as security surveillance, environment monitoring, and health care. In a sensor network, multiple sensors with or without spatially and temporally overlapping coverage generate signals. These signals need to be sampled, filtered, transmitted, processed, fused, stored, indexed, and then summarized as semantic events to allow efficient and effective queries and mining.