Title :
Power consumption and performance analysis of object tracking and event detection with wireless embedded smart cameras
Author :
Casares, Mauricio ; Pinto, Alvaro ; Wang, Youlu ; Velipasalar, Senem
Author_Institution :
Electr. Eng. Dept., Univ. of Nebraska - Lincoln, Lincoln, NE, USA
Abstract :
An embedded smart camera is a stand-alone unit that not only captures images, but also includes a processor, memory and communication interface. With battery-powered and embedded smart cameras, it has become viable to install many spatially-distributed cameras interconnected by wireless links. Not requiring to have access to electrical outlets and have wired links increase system flexibility. However, wireless and battery-powered smart-camera networks introduce many additional challenges since they have very limited resources, such as power, memory and bandwidth. The algorithms running on the camera boards should be lightweight and efficient. In addition, the frequency of communication between camera nodes, and the content of the message packets should be carefully designed, since communication consumes power. In this paper, we present a wireless embedded smart-camera system that performs peer-to-peer object tracking and event detection. We analyze the power consumption and performance of this system during different parts of the algorithm execution and for different message exchanges between camera nodes. We also present a graph of the energy consumption for different tasks performed in a camera´s processor. The number of instructions are also presented. The results demonstrate the importance of the careful choice of when and what data to transfer between cameras, and also the necessity of having lightweight algorithms in these resource-constrained systems.
Keywords :
image sensors; intelligent sensors; object detection; power consumption; target tracking; wireless sensor networks; battery-powered smart-camera networks; event detection; object tracking; peer-to-peer object tracking; performance analysis; power consumption; resource-constrained systems; spatially-distributed camera installation; stand-alone unit; wireless embedded smart cameras; wireless smart-camera networks; Bandwidth; Control systems; Energy consumption; Event detection; Peer to peer computing; Performance analysis; Power system interconnection; Smart cameras; Surveillance; Wireless sensor networks;
Conference_Titel :
Signal Processing and Communication Systems, 2009. ICSPCS 2009. 3rd International Conference on
Conference_Location :
Omaha, NE
Print_ISBN :
978-1-4244-4473-1
Electronic_ISBN :
978-1-4244-4474-8
DOI :
10.1109/ICSPCS.2009.5306375