GB1232329A – – Google Patents
GB1232329A – – Google Patents
Info
Publication number
GB1232329A
GB1232329A
GB1232329DA
GB1232329A
GB 1232329 A
GB1232329 A
GB 1232329A
GB 1232329D A
GB1232329D A
GB 1232329DA
GB 1232329 A
GB1232329 A
GB 1232329A
Authority
GB
United Kingdom
Prior art keywords
ordinates
tangency
points
scans
ridges
Prior art date
1968-09-25
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1968-09-25
Filing date
1969-08-27
Publication date
1971-05-19
1969-08-27
Application filed
filed
Critical
1971-05-19
Publication of GB1232329A
publication
Critical
patent/GB1232329A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
G—PHYSICS
G06—COMPUTING; CALCULATING OR COUNTING
G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
G06V40/12—Fingerprints or palmprints
G06V40/1347—Preprocessing; Feature extraction
Abstract
1,232,329. Fingerprint recognition. INTERNATIONAL BUSINESS MACHINES CORP. 27 Aug., 1969 [25 Sept., 1968], No. 42565/69. Heading G4R. Pattern recognition apparatus, for identifying a core of a fingerprint having a plurality of ridges, line scans the fingerprint at first and second angles to produce co-ordinates of first and second respective sets of points of tangency of the scanning lines with the ridges, and compares respective co-ordinates of the points of the two sets to determine the pair of points having co-ordinates differing by less than a predetermined quantity, the determined pair of points being taken as the location where the scans converge. The core is scanned in a plurality of parallel lines at the first angle, the distance between the scan lines being approximately the typical ridge thickness. The contents of X and Y counters, driven in step with the scanner, are gated to registers on detection of each white-toblack and following black-to-white transition to give the X and Y co-ordinates of the transitions. The extent of ridge crossing is obtained from the differences of the X and Y co-ordinates of each such pair of corresponding transitions and if it exceeds about twice the ridge thickness, the averages of the X and Y co-ordinates are stored as the co-ordinates of the point of tangency. After the whole core has been scanned at the first angle, scans are performed at the second angle until a point of tangency is obtained and stored in a similar way which is less than the typical distances between adjacent ridges from a point of tangency obtained in the scans at the first angle. The position thus obtained is taken as the core centre used as a reference point from which numbers of ridges can be counted and relative directions of line endings and bifurcations can be determined for storage and comparison for recognition purposes.
GB1232329D
1968-09-25
1969-08-27
Expired
GB1232329A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US76243368A
1968-09-25
1968-09-25
Publications (1)
Publication Number
Publication Date
GB1232329A
true
GB1232329A
(en)
1971-05-19
Family
ID=25065023
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB1232329D
Expired
GB1232329A
(en)
1968-09-25
1969-08-27
Country Status (4)
Country
Link
US
(1)
US3560928A
(en)
DE
(1)
DE1946861A1
(en)
FR
(1)
FR2018804A1
(en)
GB
(1)
GB1232329A
(en)
Families Citing this family (13)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
NL149309B
(en)
*
1969-05-10
1976-04-15
Philips Nv
CHARACTER DETECTION DEVICE FITTED WITH A CIRCUIT FOR DETERMINING THE CHARACTER HEARTLINE.
US3959884A
(en)
*
1975-07-25
1976-06-01
First Ann Arbor Corporation
Method of classifying fingerprints
US4607384A
(en)
*
1984-05-01
1986-08-19
At&T – Technologies, Inc.
Fingerprint classification arrangement
US4827527A
(en)
*
1984-08-30
1989-05-02
Nec Corporation
Pre-processing system for pre-processing an image signal succession prior to identification
US4747147A
(en)
*
1985-09-03
1988-05-24
Sparrow Malcolm K
Fingerprint recognition and retrieval system
EP0233919A4
(en)
*
1985-08-16
1990-01-26
Zegeer Jim
Fingerprint recognition and retrieval system.
US4817183A
(en)
*
1986-06-16
1989-03-28
Sparrow Malcolm K
Fingerprint recognition and retrieval system
DE4429829A1
(en)
*
1993-08-23
1995-03-02
Gim Ges Fuer Innovation Und Ma
Method and arrangement for recognition of patterns
JP4303410B2
(en)
*
2000-09-29
2009-07-29
富士通株式会社
Pattern center determining apparatus, pattern direction determining apparatus, pattern positioning apparatus, and pattern collating apparatus
JP2003058889A
(en)
*
2001-08-10
2003-02-28
S Stuff:Kk
Method and device for identifying individual
FR2848699B1
(en)
*
2002-12-13
2005-04-01
Oberthur Card Syst Sa
BIOMETRIC IDENTIFICATION BY RECOGNITION OF DIGITAL FOOTPRINT
JP5295848B2
(en)
*
2009-04-14
2013-09-18
株式会社日立製作所
Personal authentication device
CN103150541A
(en)
*
2011-12-06
2013-06-12
富泰华工业（深圳）有限公司
Fingerprint identification device and fingerprint identification method
1968
1968-09-25
US
US762433A
patent/US3560928A/en
not_active
Expired – Lifetime
1969
1969-08-19
FR
FR6928455A
patent/FR2018804A1/fr
not_active
Withdrawn
1969-08-27
GB
GB1232329D
patent/GB1232329A/en
not_active
Expired
1969-09-16
DE
DE19691946861
patent/DE1946861A1/en
active
Pending
Also Published As
Publication number
Publication date
DE1946861A1
(en)
1970-04-02
FR2018804A1
(en)
1970-06-26
US3560928A
(en)
1971-02-02
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Legal Events
Date
Code
Title
Description
1971-09-29
PS
Patent sealed [section 19, patents act 1949]
1981-04-01
PCNP
Patent ceased through non-payment of renewal fee
