Method And Apparatus For Biometric Analysis Of Sweat Ducts
AssigneeKoninklijke Philips Electronics N.V.
InventorCristian Presura
Life of this patent
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Abstract
Sweat ducts present on finger prints can be used in biometric identification or authentication systems as a differentiating or corroborating biometric feature. In addition, the activity of sweat ducts can be seen as a proof of liveness. By stimulating an object such as a finger by blowing air over the skin surface, it is possible to evoke sweat from the sweat ducts. The presence of these small droplets of sweat on the skin surface can be used to locate the position of sweat ducts, using either a spatial or temporal analysis of images of the skin surface. In addition, a temporal analysis can highlight sweat duct activity, which in turn can be used as a proof of liveness.
Claims12
1-16. (canceled)
An apparatus (1) for matching of sweat ducts on a part of the skin surface of a finger, the apparatus comprising:
- a skin stimulation means (22) for blowing air over said skin surface to evoke sweat from said sweat ducts,
- a skin image capture means (24) arranged to sample said skin surface and create an electrical skin surface representation (12), the skin image capture means comprising a sweat duct location means (26) arranged to locate positions of sweat ducts on said skin surface using the electrical skin surface representation (12) and create an electrical sweat duct position representation (27) of the sweat duct positions, and
- a sweat duct matching means (28) arranged to match information comprising the electrical sweat duct position representation (27) with a pre-recorded sweat duct pattern in a reference database (30).
A method of matching sweat ducts on a part of the skin surface of a finger, comprising
- stimulating said skin surface by blowing air over it, to evoke sweat from said sweat ducts,
- sampling said skin surface, thus creating an electrical skin surface representation (12) of said skin surface,
- locating positions of sweat ducts on said skin surface using the electrical skin surface representation (12) and
- creating an electrical sweat duct representation (27) of the sweat duct positions, and
- matching information comprising the electrical sweat duct representation (27) with a pre-recorded sweat duct pattern in a reference database (30).
Dependencies are inferred from the claim text.