Browse Prior Art Database

Low Cost Personal Identification Verification Device Based on Finger Dimensions

IP.com Disclosure Number: IPCOM000050074D
Original Publication Date: 1982-Sep-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Svigals, J: AUTHOR

Abstract

As described in U.S. Patent 3,576,537, finger dimensions provide a simple low cost verification of the identity of a person representing to be a particular person. In this article, a person's hand, illuminated from above, is placed on a matrix of optical sensors, the little finger against a side plate and the middle finger touching a back plate. Finger dimensions are determined from the pattern of covered sensors and are compared with stored dimensions known to be correct for the authorized account holder, for example. Indent points between the fingers are used as the critical measurement points to avoid variations in finger length (e.g., fingernail growth).

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Low Cost Personal Identification Verification Device Based on Finger Dimensions

As described in U.S. Patent 3,576,537, finger dimensions provide a simple low cost verification of the identity of a person representing to be a particular person. In this article, a person's hand, illuminated from above, is placed on a matrix of optical sensors, the little finger against a side plate and the middle finger touching a back plate. Finger dimensions are determined from the pattern of covered sensors and are compared with stored dimensions known to be correct for the authorized account holder, for example. Indent points between the fingers are used as the critical measurement points to avoid variations in finger length (e.g., fingernail growth).

The figure shows a matrix 11 of sensors, the origin of the matrix being at point 29. Side plate 13 and back plate 15 include sensors responding to contact by the small finger and middle finger, respectively. When contact is simultaneously made with the side and back plates, a start search signal is generated by search logic 17 to read the pattern of the boundary between the uncovered and covered sensors into storage matrix 19. Matrix 11 has, for example, sensors on one eighth inch centers and is scanned from bottom to top in vertical scans proceeding from left to right.

An exemplary method of using the apparatus of the figure depends upon the following definitions. Fingers are numbered 1, 2, 3, 4 beginning with the index finger an...