JPH01213764A - Method for preparing dictionary for collating finger print - Google Patents

Method for preparing dictionary for collating finger print

Info

Publication number
JPH01213764A
JPH01213764A JP3848688A JP3848688A JPH01213764A JP H01213764 A JPH01213764 A JP H01213764A JP 3848688 A JP3848688 A JP 3848688A JP 3848688 A JP3848688 A JP 3848688A JP H01213764 A JPH01213764 A JP H01213764A
Authority
JP
Japan
Prior art keywords
image
sweat gland
beared
circuit
fine line
Prior art date
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.)
Granted
Application number
JP3848688A
Other versions
JP2735075B2 (en
Inventor
Seigo Igaki
Hiroyuki Ikeda
Hironori Yahagi
Original Assignee
Fujitsu Ltd
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.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP63038486A priority Critical patent/JP2735075B2/en
Publication of JPH01213764A publication Critical patent/JPH01213764A/en
Application granted granted Critical
Publication of JP2735075B2 publication Critical patent/JP2735075B2/en
Anticipated expiration legal-status Critical
Application status is Expired - Fee Related legal-status Critical

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K9/00Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
    • G06K9/00006Acquiring or recognising fingerprints or palmprints
    • G06K9/00067Preprocessing; Feature extraction (minutiae)
    • G06K9/00073Extracting features related to minutiae and pores

Abstract

PURPOSE: To surely remove a beared and a sweat gland without using a mask by judging the beared and the sweat gland with an edge point and a branch point a special micro-picture area as a characteristic point.
CONSTITUTION: An image from a fingerprint sensor 13 is taken into a CCD camera 14 and accumulated to a frame memory 15. The image is binarized by a binarizing circuit 16, after a fine line processing is executed by a fine line circuit 18, the picture is stored into a fine line image memory circuit 19. A beared detecting circuit 21 and a sweat gland detecting circuit 22 executes the mask processing of the fine line processed partial image, the edge point and branch point in the image are detected, when the edge point and branch point are mutually in the vicinity and the picture element of a raised line part exists in the middle, it is judged that the beared is obtained and when two branch points are in the vicinity, it is judged that the sweat gland points are in the vicinity, it is judged that the sweat gland is obtained. These beared and sweat gland are removed and the partial image of a truly characteristic binary image is registered at a dictionary output circuit 25.
COPYRIGHT: (C)1989,JPO&Japio
JP63038486A 1988-02-23 1988-02-23 Dictionary creation method for fingerprint matching Expired - Fee Related JP2735075B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63038486A JP2735075B2 (en) 1988-02-23 1988-02-23 Dictionary creation method for fingerprint matching

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63038486A JP2735075B2 (en) 1988-02-23 1988-02-23 Dictionary creation method for fingerprint matching

Publications (2)

Publication Number Publication Date
JPH01213764A true JPH01213764A (en) 1989-08-28
JP2735075B2 JP2735075B2 (en) 1998-04-02

Family

ID=12526589

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63038486A Expired - Fee Related JP2735075B2 (en) 1988-02-23 1988-02-23 Dictionary creation method for fingerprint matching

Country Status (1)

Country Link
JP (1) JP2735075B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007012040A (en) * 2005-05-31 2007-01-18 Semiconductor Energy Lab Co Ltd Communication system and authentication card
US8700910B2 (en) 2005-05-31 2014-04-15 Semiconductor Energy Laboratory Co., Ltd. Communication system and authentication card

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6329888A (en) * 1986-07-23 1988-02-08 Nippon Denso Co Ltd Feature extracting device for finger print

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6329888A (en) * 1986-07-23 1988-02-08 Nippon Denso Co Ltd Feature extracting device for finger print

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007012040A (en) * 2005-05-31 2007-01-18 Semiconductor Energy Lab Co Ltd Communication system and authentication card
US8700910B2 (en) 2005-05-31 2014-04-15 Semiconductor Energy Laboratory Co., Ltd. Communication system and authentication card
US9077523B2 (en) 2005-05-31 2015-07-07 Semiconductor Energy Laboratory Co., Ltd. Communication system and authentication card

Also Published As

Publication number Publication date
JP2735075B2 (en) 1998-04-02

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees