EP0507319A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Fingerprint image processing system capable of simply processing minutiae
Assignee: NEC Corp
•
Filing: 1992-04-03
•
Granted: —
•
Expires: 2012-04-03
Abstract
Abstract In a fingerprint image processing system for use in processing a fingerprint image prior to identification of a fingerprint, edition or correction is made by adding true minutiae and/or eliminating false minutiae from the fingerprint image displayed on an output device to leave only real minutiae and to formulate a minutia list which registers a location of each minutia, a minutia direction, and minutia relations representative of adjacent minutia pairs. Edition of the minutiae may be carried out by handling the minutiae as an image while correction may be made by recognizing the minutiae as data. Ridge numbers between two adjacent ones of the minutiae are included in the minutia relations and may be manually or automatically extracted from the fingerprint image.
Inventors
- 👤 Ritsuko c/o NEC Security Systems Ltd. Omori
- 👤 Isamu c/o NEC Security Systems Ltd. Suzuki
- 👤 Tatsuo C/O Nec Security Systems Ltd. Shibuya
- 👤 Yukio c/o NEC Security Systems Ltd. Hoshino
- 👤 Kazuo c/o NEC Security Systems Ltd. Kiji
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 16:51
CPC Classifications
G; G06; G06V; G06V40/00; G06V40/10; G06V40/12; G06V40/1347; G07; G07C; G07C9/00; G07C9/30; G07C9/32; G07C9/37
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
108 words
A fingerprint image processing system for use in processing an input fingerprint image extracted from an object to produce a processed fingerprint image signal representative of a processed fingerprint image, said input fingerprint image including minutiae and ridges, said fingerprint image processing system comprising: display means for visually displaying said input fingerprint image: modifying means for modifying said minutiae to leave only real minutiae on said display means and to obtain said processed fingerprint image on said display means: list formulating means for formulating a minutiae list in relation to said real minutiae and said ridges; and means for storing said minutiae list as said processed fingerprint signal.
Claim 2
Dependent Claim
114 words
A fingerprint minutia editing system for use in editing a preedition fingerprint image extracted from an object to produce an edited fingerprint signal representative of an edited fingerprint image, said edited fingerprint image including minutiae and ridges, said fingerprint minutia editing system comprising: display means for visually displaying said preedition fingerprint image: editing means for editing said minutiae by modifying said minutia and said ridges to leave only real minutiae on said display means and to obtain said edited fingerprint image on said display means; list formulating means for formulating a minutia list in relation to said real minutia and said ridges; and means for storing said minutia list as said edited fingerprint signal.
Claim 3
Dependent Claim
62 words
A fingerprint editing system as claimed in Claim 2, wherein said editing means comprises: adding means for adding true minutiae to said preedition fingerprint image on said display means; eliminating means for eliminating false minutiae from said preedition fingerprint image on said display means; and means for leaving only said real minutiae in cooperation with said adding means and said eliminating means.
Claim 4
Dependent Claim
152 words
A fingerprint minutia correction system for use in correcting an input fingerprint image extracted from an object to produce a corrected fingerprint signal representative of a corrected fingerprint image, said input fingerprint image including minutia and ridges, said fingerprint minutia correction system comprising: means for extracting said minutia from said input fingerprint image to produce minutia data signals representative of said minutiae; display means for visually displaying said minutia data signals on said input fingerprint image; correcting means for correcting said minutia data signals on said displaying means to leave only real minutia data signals together with said fingerprint image on said display means and to obtain said corrected fingerprint image on said display means; list formulating means for formulating a minutia list in relation to said real minutiae and said ridges by the use of said corrected fingerprint image; and means for storing said minutiae list as said corrected fingerprint signal.
Claim 5
Dependent Claim
77 words
A fingerprint minutia correction system as claimed in Claim 4, wherein said correcting means comprises: adding means for adding true minutia data signals to said input fingerprint image on said display means; eliminating means for eliminating false minutia data signals from said input fingerprint image on said display means; and means for obtaining only said real minutiae by adding said true minutia data signals to and eliminating said false minutia data signals from said input fingerprint image.
Claim 6
Dependent Claim
100 words
A fingerprint minutia correction system as claimed in Claim 5, wherein said list formulating means comprises: means for successively indicating an objective one of said real minutiae together with an adjacent one of said real minutiae; means for detecting locations of said objective and said adjacent ones of the real minutiae; ridge number calculating means for successively calculating ridge numbers between said objective and said adjacent ones of the real minutiae; and means for successively memorizing the locations and the ridge numbers at every one of said objective and said adjacent ones of the real minutiae into said minutia list.
Claim 7
Dependent Claim
126 words
A fingerprint minutia correcting system as claimed in Claim 5, wherein said list formulating means further comprises: means for automatically indicating an objective one of said real minutiae together with an adjacent one of said real minutiae; means for detecting locations of said objective and said adjacent ones of the real minutiae; means for calculating estimated ridge numbers between said objective and said adjacent ones of the real minutiae after detection of said locations of the objective and the adjacent ones of the real minutiae; visual display means for displaying said estimated ridge numbers on said displaying means; modifying means for modifying said estimated ridge numbers into modified ridge numbers; and means for successively memorizing the locations and said modified ridge numbers into said minutia list.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.