I. Introduction
The explosive development in VLSI devices and image sensor techniques has enabled the cost effective development of the large-scale, small-size, and energy-saving wireless camera sensor networks (WCSNs). As a result, how to efficiently design and implement WCSNs in many critical applications, such as the battlefield surveillance, homeland security, industrial process supervision, and health monitoring systems has received a great deal of research attention from both academia and industry [1], [2].