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Picking Out Faces In The Crowd.(The Technologist; SECURITY)(Brief article)

Newsweek International

| February 11, 2008 | COPYRIGHT 2008 Newsweek, Inc. All rights reserved. Any reuse, distribution or alteration without express written permission of Newsweek is prohibited. For permission: www.newsweek.com. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

Cameras may be everywhere, but recognizing faces in the images is difficult for both people and machines alike. Test subjects do well at recognizing the faces of people they know in photographs. (Tony Blair is as easy to spot in a profile taken in a dark room as in a full frontal shot under the sun's glare.) But they do poorly at matching images of an unfamiliar person taken in varying light conditions, resolution, quality and camera angle. Computers have the same problem. The face-recognition system used by the Australian Customs Service, for instance, scored a poor 54 percent hit rate in a test by University of Glasgow psychologist Rob ...

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