We already have iris(虹膜) and fingerprint scanning but noses could be an even better method of dentification, says a study from the University of Bath, UK.

　　The researchers scanned noses in 3D and characterized them. They found 6 main nose types: Roman, Greek, Nubian, hawk, snub and turn-up. Since they are hard to hide, the study says, noses would work well for identification.

　　The researchers say noses have been overlooked in the growing field of biometrics, studies into ways of identifying distinguishing characters of people. "Noses are out- standing facial features and yet their use as a biometric has been largely unexplored," said the University of Bath's Dr Adrian Evans. "Ears have been looked at in detail, eyes have been looked at in terms of iris recognition but the nose has been ignored."

　　The researchers used a system called Photo Face, developed by researchers at the University of the West of England in Bristol, for the 3D scans.

　　Several measurements by which noses can be recognized were identified and the team developed recognition software based on these parameters(范围)

　　“This initial work is nowhere as good as iris identification but the nose has pros and cons," said Dr Evans.

　　There's no magic biometric that solves all your problems. Irises are a powerful biometric but can be difficult to get accurately and can be easily covered by eyelids or glasses. People can easily cover up their ears, with their hair for example.

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