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Published online 26 March 2004 | Nature | doi:10.1038/news040322-13
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Smiles reveal secrets to security cameras
Expressive muscles could be the key to face recognition.
Mapping the muscles that shape smiles could lead to better face recognition systems, a team of physicists has suggested.
E Guan and colleagues at Stony Brook University, New York, say current techniques are easy to evade.
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