The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 14, 1992
Filed:
Nov. 27, 1990
Bong I Kim, Seoul, KR;
Mun K Kim, Seoul, KR;
Young K An, Seoul, KR;
Jae Y Lee, Seoul, KR;
Sang S Lee, Kyungki-Do, KR;
Hwang J Lee, Seoul, KR;
Yun S Lee, Seoul, KR;
Man H Kim, Seoul, KR;
Ki H Chung, Kyungki-Do, KR;
Nam C Kang, Seoul, KR;
Sun P Hong, Seoul, KR;
Jung H Choi, Seoul, KR;
Other;
Abstract
A method of fingerprint verification includes determining a direction difference between a direction pattern of an input fingerprint and a direction pattern of a registered fingerprint and comparing the determined direction difference with predetermined upper and lower threshold values. The input and registered fingerprints are considered the same if the direction difference is lower than the lower threshold value, and the input and registered fingerprints are considered to be different if the direction difference is higher than the upper threshold value. If the direction different is between the upper and lower threshold values, minutiae of the input and registered fingerprints are extracted for verifying the input fingerprint. The extracting includes preprocessing of the input fingerprint image, uniboundary extraction of the input fingerprint minutiae, and restoration to eliminate pseudo-minutiae.