Apparatus and method for biometric identification using silhouette and displacement images of a portion of a person's hand
First Claim
1. Biometric measuring apparatus for recognizing a person'"'"'s identity based on measurements performed on the person'"'"'s hand, said apparatus comprising:
- means for producing and storing a silhouette image of at least a portion of a person'"'"'s hand including at least one finger to provide a stored silhouette image,means for producing and storing a displacement image of the same portion of a person'"'"'s hand to provide a stored displacement image from which measurement data on finger height characteristics can be derived;
means for analyzing said stored silhouette image and said stored displacement image to produce hand feature data, including hand feature data derived at least in part from said measurement data on finger height characteristics derived from said stored displacement image;
means for storing hand enrollment data comprising said hand feature data obtained during a hand enrollment operation cycle;
means for storing hand bid data comprising said hand feature data obtained during a hand bid operation cycle; and
means for comparing hand bid data with hand enrollment data to decide on the basis of prearranged decision criteria whether said hand bid data and said hand enrollment data were produced by the same hand portion.
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Accused Products
Abstract
Biometric measuring apparatus for recognizing a person'"'"'s identity based on measurements performed on the person'"'"'s hand. An arrangement for producing and storing a silhouette image of at least a portion of a person'"'"'s hand is combined with an arrangment for producing and storing a displacement image of the same portion of a person'"'"'s hand to provide measurement data on finger height characteristics. An analyzing device analyzes the silhouette image and the displacement image to produce hand feature data. The apparatus stores hand feature data obtained during a hand enrollment operation cycle and to compare with hand feature data obtained during a subsequent hand bid operation cycle to determine if the person has previously been enrolled on the apparatus.
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Citations
36 Claims
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1. Biometric measuring apparatus for recognizing a person'"'"'s identity based on measurements performed on the person'"'"'s hand, said apparatus comprising:
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means for producing and storing a silhouette image of at least a portion of a person'"'"'s hand including at least one finger to provide a stored silhouette image, means for producing and storing a displacement image of the same portion of a person'"'"'s hand to provide a stored displacement image from which measurement data on finger height characteristics can be derived; means for analyzing said stored silhouette image and said stored displacement image to produce hand feature data, including hand feature data derived at least in part from said measurement data on finger height characteristics derived from said stored displacement image; means for storing hand enrollment data comprising said hand feature data obtained during a hand enrollment operation cycle; means for storing hand bid data comprising said hand feature data obtained during a hand bid operation cycle; and means for comparing hand bid data with hand enrollment data to decide on the basis of prearranged decision criteria whether said hand bid data and said hand enrollment data were produced by the same hand portion. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11, 13, 14)
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4. Apparatus as claimed in claims, wherein said first illumination means further comprises
a first mirror supported in a prearranged orientation above said platen, and wherein said circular array of light sources is mounted in a prearranged location generally adjacent said platen and oriented to direct output light beams emitted therefrom onto said first mirror to be reflected onto said platen; - and wherein said second illumination means further comprises a second mirror supported in a prearranged orientation above said platen and generally adjacent said first mirror for directing said structured light pattern onto said platen.
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12. Apparatus as claimed in 1, wherein said means for storing hand enrollment data comprises means for storing a plurality of hand enrollment data sets, each of said hand enrollment data sets being associated with one of a plurality of slightly different finger positions of the same person'"'"'s hand produced by multiple presentations of said hand on said platen so that said plurality of hand enrollment data sets may be utilized to produce more useful hand enrollment data during said hand enrollment operation cycle.
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15. In biometric measuring apparatus for recognizing a person'"'"'s identity based on measurements of the person'"'"'s hand, the combination comprising:
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support means on which at least a portion of the hand of a person including at least a pair of fingers may be placed; image capture means for viewing said support means from a prearranged image viewing direction and for capturing and storing an image of a hand portion placed thereon; first illumination means for illuminating said support means and a hand portion placed thereon to present to said image capture means a silhouette image of said hand portion; second illumination means for illuminating said support means and a hand portion placed thereon to present to said image capture means a displacement image of said hand portion which can be correlated with said silhouette image to provide measurement data on finger height characteristics; image acquisition means coupled to said image capture means, said first illumination means and said second illumination means for operating said image capture means and said first illumination means during a silhoutte image capture period to acquire and store said sihouette image of said hand portion to produce a stored silhouette image, and for operating said image capture means and said second illumination means during a displacement image capture period to acquire and store said displacement image of said hand portion to produce a stored displacement image. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. In a method for recognizing a person'"'"'s identity based on measurements performed on the person'"'"'s hand the steps of:
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a. disposing a support means on which at least a portion of a person'"'"'s hand including at least one finger may be presented; b. illuminating said support means and said portion of a person'"'"'s hand presented thereon with a substantially uniform flood of light to produce a silhouette image of said hand portion; c. capturing and storing silhoutte image data representing said silhouette image to produce stored silhouette image data; d. illuminating said support means and said portion of a person'"'"'s hand presented thereon with a light source which produces a displacement image of said hand portion which displacement image can be correlated with said silhouette image to produce measurement data on finger height characteristics; e. capturing and storing displacement image data representing said displacement image to produce stored displacement image data; and f. analyzing said stored silhouette image data and said stored displacement image data to produce hand feature data. - View Dependent Claims (29, 30, 31, 32, 33, 34)
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35. Biometric measuring apparatus for recognizing a person'"'"'s identity based on measurements performed on the person'"'"'s hand, said apparatus comprising:
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means for producing a silhoutte image of at least a portion of a person'"'"'s hand; means for producing a displacement image of the same hand portion; means for analyzing said silhouette image and said displacement image to produce hand feature data; means for comparing hand feature data obtained during a hand bid cycle with hand feature data obtained during a previous hand enrollment cycle to determine if the person'"'"'s hand was previously enrolled,
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36. In a method for recognizing a person'"'"'s identity based on measurements of performed on the person'"'"'s hand, the steps of:
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a. capturing a silhoutte image of at least a portion of a person'"'"'s hand; b. capturing a displacement image of said portion of a person'"'"'s hand; c. analyzing said silhouette image and said displacement image to produce hand feature data; and d. comparing hand feature data obtained during a hand bid cycle with hand feature data obtained during a previous hand enrollment cycle to determine if the person'"'"'s hand was previously enrolled.
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Specification