Sensor networks, or sensor webs, which consist of a large number of interconnected sensing devices, have been the subject of extensive research in the past couple of years. Typical applications of sensor networks include monitoring of possibly very large, remote and/or inaccessible areas, surveillance, smart environments like meeting rooms, buildings, homes, and highways. Our focus is on visual...

Wireless Sensor Networks (WSN) mainly deal with scalar data such as temperature, humidity, and light which are very suitable for low rate and low power IEEE 802.15 based networking technology. The commercial off-the-shelf (COTS) CMOS camera has fostered researchers to push WSN a step further. The unique properties of multimedia data delivery pose fresh challenges for resource constrained sensor...

The development of wireless sensor networks for control and monitoring functions has created a vibrant investigation scenario, where many critical topics, such as communication efficiency and energy consumption, have been investigated in the past few years. However, when sensors are endowed with low-power cameras for visual monitoring, a new scope of challenges is raised, demanding new research...

A sensor node is composed of different parts including processing units, sensor, transmitter, receiver, and security unit. There are many nodes in a sensor unit. These networks can be used for military, industrial, medicine, environmental, house, and many other applications. These nodes may be established in the lands of enemies to monitor the relations. Hence, it is important to consider conse...

Wireless Sensor Networks continue to gain tremendous popularity, as evidenced by the increasing number of applications for these networks. The limiting factors of the sensor nodes, such as their finite energy supplies and their moderate processing abilities, as well as the unreliable wireless medium restrict the performance of wireless sensor networks. In this dissertation, we explore applicati...