Finger profile identification system
First Claim
1. A method of identifying an individual based on the profile of one or more fingers on a hand, the method comprising the steps of creating a reference template bya) determining the location of the edges of each finger separately,b) establishing a central axis for each finger by reference to the edges thereof,c) rotating the central axis of each finger until it is normal to a common reference line,d) determining the finger profile by measuring the distance of each finger edge from its central axis at predetermined locations parallel to said reference line, ande) recording said finger profile information as a template;
- and thereafterdetermining a candidate'"'"'s finger profile by following steps a) to d) above,comparing the candidate'"'"'s finger profile with the reference template,determining whether the correspondence between the candidate'"'"'s finger profile and the reference template meets certain predetermined criteria, andindicating acceptance or rejection of the candidate.
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Accused Products
Abstract
A method of and apparatus for verifying the identity of an individual is based on the profile of a hand print. A set of reference data is created by determining the location of the edges of each finger separately to generate a set of finger profiles, establishing a central axis for each finger profile by reference to the edges thereof, rotating the central axis of each finger profile until it is normal to a reference line, determining the width of each finger profile at predetermined locations parallel to said reference line, and recording said finger profile information. Thereafter, a candidate'"'"'s finger profile can then be compared with the reference profile by comparing the width of each finger profile at predetermined locations, determining whether the corresponding between finger widths at said predetermined locations meets a predetermined criteria, and then indicating acceptance or rejection of the candidate. The apparatus does not require posts or grooves to force the hand or fingers into any predeterminded position.
233 Citations
18 Claims
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1. A method of identifying an individual based on the profile of one or more fingers on a hand, the method comprising the steps of creating a reference template by
a) determining the location of the edges of each finger separately, b) establishing a central axis for each finger by reference to the edges thereof, c) rotating the central axis of each finger until it is normal to a common reference line, d) determining the finger profile by measuring the distance of each finger edge from its central axis at predetermined locations parallel to said reference line, and e) recording said finger profile information as a template; - and thereafter
determining a candidate'"'"'s finger profile by following steps a) to d) above, comparing the candidate'"'"'s finger profile with the reference template, determining whether the correspondence between the candidate'"'"'s finger profile and the reference template meets certain predetermined criteria, and indicating acceptance or rejection of the candidate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- and thereafter
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10. A method of generating an autocorrelation curve from the profile of one or more fingers, the method comprising the steps of
determining the location of the edges of each finger separately thereby to generate a set of finger profiles, establishing a central axis for each finger profile by comparing the edges thereof, rotating the central axis of each finger profile until it is normal to a reference line, making an exact copy of a section of each finger profile, displacing the section of each finger profile relative to its corresponding finger profile to exaggerate salient shape features of the finger profile.
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12. An apparatus for verifying the identity of a candidate based on finger profiles including
means for determining a profile of each finger by locating the edges thereof, said means including a back lighted panel and video means for sensing the location of said finger edges, means for determining each finger profile independently of its orientation on said panel, means for storing a reference template comprising the finger profiles of an individual, means for comparing the finger profiles of a candidate to said reference template, and means for indicating when the candidate'"'"'s finger profiles are within predetermined limits of sameness with regard to said reference template.
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16. A method of verifying the identity of an individual based on the profile of one or more fingers, the method comprising the steps of
determining the location of the edges of each finger separately thereby to generate a set of finger profiles, establishing a central axis for each finger profile by comparing the edges thereof, rotating the central axis of each finger profile until it is normal to a common reference line, comparing a selected area of a finger profile to a corresponding area of a previously stored reference finger profile.
Specification