Identification system employing verification of fingerprints
First Claim
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1. An identification system comprising:
- input means for collecting a streaked pattern of a fingerprint from a surface of a finger to store a streaked pattern image;
storing means for storing a plurality of pattern features of a plurality of registered fingerprints, each of said pattern features including at least information identifying within a coordinate system the positions of first and second registered feature points and a registered number of streaks of said registered fingerprints existing between said first and second registered feature points;
selecting means for selecting one of said pattern features as a reference pattern feature from said storing means; and
identifying means for verifying correspondence between said streaked pattern image and said reference pattern feature, said identifying means determining at least on the basis of coordinate values first and second objective areas in said streaked pattern image at positions corresponding to said positions of said first and second registered feature points of said reference pattern feature, respectively, scanning said first and second objective areas in order to detect first and second candidate feature points, respectively, counting a number of streaks of said streaked pattern image existing between said first and second candidate feature points to generate a count value, and comparing said count value with said registered number.
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Abstract
An identification system for identifying authorized personnel compares a streaked pattern of a fingerprint of an individual with selected fingerprint patterns stored in memory of all authorized personnel in order to determine if the individual is included among the authorized personnel. The streaked pattern is compared with the fingerprint patterns stored in memory on the basis of characteristics between a reference point of a fingerprint and its relationship to other selected points of the fingerprint.
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Citations
13 Claims
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1. An identification system comprising:
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input means for collecting a streaked pattern of a fingerprint from a surface of a finger to store a streaked pattern image; storing means for storing a plurality of pattern features of a plurality of registered fingerprints, each of said pattern features including at least information identifying within a coordinate system the positions of first and second registered feature points and a registered number of streaks of said registered fingerprints existing between said first and second registered feature points; selecting means for selecting one of said pattern features as a reference pattern feature from said storing means; and identifying means for verifying correspondence between said streaked pattern image and said reference pattern feature, said identifying means determining at least on the basis of coordinate values first and second objective areas in said streaked pattern image at positions corresponding to said positions of said first and second registered feature points of said reference pattern feature, respectively, scanning said first and second objective areas in order to detect first and second candidate feature points, respectively, counting a number of streaks of said streaked pattern image existing between said first and second candidate feature points to generate a count value, and comparing said count value with said registered number. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for determining whether an individual is included among a plurality of fingerprint registrants, comprising the steps of:
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preparing a plurality of pattern features of fingerprints of said fingerprint registrants, each of said pattern features including at least information identifying within a coordinate system the positions of first and second registered feature points and a registered number of streaks of said fingerprint existing between said first and second registered feature points; inputting a streaked pattern of a fingerprint from a surface of a finger of an individual; selecting one of said pattern features as a reference pattern feature; determining at least on the basis of coordinate values first and second objective areas in said streaked pattern at positions corresponding to said positions of said first and second registered feature points of said reference pattern features; scanning in said first and second objective areas to extract first and second candidate feature points, respectively; detecting a number of streaks of said streaked pattern existing between said first and second candidate feature points to produce a count value; comparing said registered number with said count value to produce a comparing result; and determining if there is correspondence between said streaked pattern and said reference feature in response to said comparing result.
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13. A method for determining whether an individual is included among a plurality of fingerprint registrants, comprising the steps of:
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storing a plurality of pattern features each extracted from a first streaked pattern of a respective registered fingerprint and each including information identifying within a coordinate system first and second positions of first and second registered feature point of said first streaked pattern and a registered number of streaks of said first streaked pattern existing between said first and second feature points; collecting a second streaked pattern of a fingerprint from a surface of a finger; selecting one of said pattern features as a reference pattern feature from said storing means; setting at least on the basis of coordinate values a first objective area in said second streaked pattern at a position corresponding to said first position of said first registered feature point of said reference feature pattern; detecting a first candidate feature point of said second streaked pattern in said first objective area; collecting a positional displacement between said first position of said first registered feature point and a position of said first candidate feature point; setting at least on the basis of coordinate values a second objective area in said second streaked pattern at a position corresponding to said second position of said second registered feature point of said reference pattern feature; detecting a second candidate feature point of said second streaked pattern in said second objective area; counting a number of streaks of said second streaked pattern existing between said first and second candidate feature points to output of count value; and identifying correspondence between said first and second streaked pattern by comparing said count value with said registered number.
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Specification