 The network generally consists of the cameras themselves, which have some local image processing, communication and storage capabilities, and possibly one or more central computers, where image data from multiple cameras is further processed and fused (this processing may, however, simply take place in a distributed fashion across the cameras and their local controllers).Visual sensor networks also provide some high-level services to the user so that the large amount of data can be distilled into information of interest using specific queries.The primary difference between visual sensor networks and other types of sensor networks is the nature and volume of information the individual sensors acquire