Facial Recognition

Facial-recognition technology translates spatial relationships between various parts of the face into complex mathematical patterns. Subtle features such as nose bridges, cheekbone structures and eye-socket shapes are used to develop a unique numerical template called a faceprint, which can then be stored and compared like a fingerprint.

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Researched by VICKI GALLAY/Los Angeles Times

Source: www-white.media.mit.edu/vismod/demos/facerec/system.html.

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How Stuff Works: www.howstuffworks.com