- Visual sensor network
A visual sensor network is a network of spatially distributed
smart cameradevices capable of processing and fusing images of a scene from a variety of viewpoints into some form more useful than the individual images. A visual sensor network may be a type of wireless sensor network, and much of the theory and application of the latter applies to the former. 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. cite journal|first=K.|last=Obraczka|coauthors=Manduchi, R., Garcia-Luna-Aveces, J. J.|title=Managing the Information Flow in Visual Sensor Networks|url=https://www.soe.ucsc.edu/~manduchi/Papers/178-obraczka.pdf |journal=Proc. 5th Intl. Symposium on Wireless Personal Multimedia Communications|pages=1177–1181|month=October| year=2002|doi=10.1109/WPMC.2002.1088364|volume=3] cite journal|first=M.|last=Akdere|coauthors=Centintemel, U., Crispell, D., Jannotti, J., Mao, J., Taubin, G.|title=Data-Centric Visual Sensor Networks for 3D Sensing|url=http://www.cs.brown.edu/~jj/papers/3d-geo06.pdf |journal=Proc. 2nd Intl. Conf. on Geosensor Networks|month=October| year=2006] [Castanedo, F., Patricio, M. A., García, J., and Molina, J. M. 2006. Extending surveillance systems capabilities using BDI cooperative sensor agents. In Proceedings of the 4th ACM international Workshop on Video Surveillance and Sensor Networks (Santa Barbara, California, USA, October 27 - 27, 2006). VSSN '06. ACM Press, New York, NY, 131-138. DOI= http://doi.acm.org/10.1145/1178782.1178802 ]
The primary difference between visual sensor networks and other types of sensor networks is the nature and volume of information the individual sensors acquire: unlike most
sensors, cameras are directional in their field of view, and they capture a large amount of visual information which may be partially processed independently of data from other cameras in the network. Alternatively, one may say that while most sensors measure some value such as temperature or pressure, visual sensors measure "patterns". In light of this, communication in visual sensor networks differs substantially from traditional sensor networks.
Visual sensor networks are most useful in applications involving area
surveillance, tracking, and environmental monitoring. Of particular use in surveillance applications is the ability to perform a dense 3D reconstruction of a scene and storing data over a period of time, so that operators can view events as they unfold over any period of time (including the current moment) from any arbitrary viewpoint in the covered area, even allowing them to "fly" around the scene in real time. High-level analysis using object recognitionand other techniques can intelligently track objects (such as people or cars) through a scene, and even determine what they are doing so that certain activities could be automatically brought to the operator's attention. Another possibility is the use of visual sensor networks in telecommunications, where the network would automatically select the "best" view (perhaps even an arbitrarily generated one) of a live event.
Wireless sensor network
* [http://www.cs.toronto.edu/~faisal/virtual-vision/index.html Virtual Vision for Smart Camera Sensor Networks]
* [http://www.cyclopscamera.org/index.php Cyclops Camera]
* [http://www.cmucam.org/ CMUcam3]
Wikimedia Foundation. 2010.
Look at other dictionaries:
Wireless sensor network — WSN redirects here. For the metasyntax, see Wirth syntax notation. Typical multi hop wireless sensor network architecture A wireless sensor network (WSN) consists of spatially distributed autonomous sensors to monitor physical or environmental… … Wikipedia
Visual privacy — is the relationship between collection and dissemination of visual information, the public expectation of privacy, and the legal issues surrounding them. In particular, large scale camera networks have created increasing interest in understanding … Wikipedia
Cellular neural network — Cellular neural networks (CNN) are a parallel computing paradigm similar to neural networks, with the difference that communication is allowed between neighbouring units only. Typical applications include image processing, analyzing 3D surfaces,… … Wikipedia
Mobile data offloading — Mobile data offloading, also called data offloading is the use of complementary network technologies for delivering data originally targeted for cellular networks. Rules triggering the mobile offloading action can either be set by an end user… … Wikipedia
Wi-Fi — For the radio station, see WIFI (AM). Wi Fi logo Wi Fi ( / … Wikipedia
WiMAX — Worldwide Interoperability for Microwave Access Logo trademarked by the WiMAX Forum … Wikipedia
Mobile television — DMB in South Korea Mobile television usually means television watched on a small handheld device. It may be a pay TV service broadcast on mobile phone networks or received free to air via terrestrial television stations from either regular… … Wikipedia
Digital Video Broadcasting — Official DVB logo, found on compliant devices List of digital television broadcast standards … Wikipedia
DVB-H — List of digital television broadcast standards DVB standards (Europe) DVB S (satellite) DVB S2 DVB T (terrestrial) DVB T2 DVB C ( … Wikipedia
Satellite television — List of digital television broadcast standards DVB standards (Europe) DVB S (satellite) DVB S2 DVB T (terrestrial) DVB T2 DVB C … Wikipedia