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US5351304A
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Fingerprint data registration method
Assignee: Yozan Inc
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Filing: 1993-12-22
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Granted: 1994-09-27
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Expires: 2013-12-22
Abstract
Abstract A fingerprint data registering method which can clearly show the characteristics of minutiae by storing the information of an original image. The method includes thinning a fingerprint image into an array of pixels, converting a pixel in each array into a multi-bit binary value corresponding to the pattern of the array, and storing the multi-bit binary value as the pixel.
Inventors
- 👤 Makoto Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:16
CPC Classifications
G; G07; G07C; G07C9/00; G07C9/30; G07C9/32; G07C9/37; G06; G06V; G06V40/00; G06V40/10; G06V40/12; G06V40/1347
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
69 words
A fingerprint data registering method comprising the steps of: thinning a fingerprint image; for each pixel in said thinned image, determining: (1) a value representing the minutia data for the pattern formed by both said pixel and the pixels which are adjacent to said pixel; and (2) a value representing the specific pixel arrangement of said adjacent pixels; and storing said minutia data value and said pixel arrangement value.
Claim 2
Dependent Claim
69 words
A fingerprint data registering method comprising the steps of: thinning a fingerprint image; for each pixel in said thinned image, determining: (1) a value representing the minutia data for the pattern formed by both said pixel and the pixels which are adjacent to said pixel; and (2) a value representing the specific pixel arrangement of said adjacent pixels; and storing said minutia data value and said pixel arrangement value.
Claim 3
Dependent Claim
33 words
A fingerprint data registering method as claimed in claim 1, wherein said minutia data value and said pixel arrangement value are stored as a multi-bit binary value which includes 7 bits of data.
Claim 4
Dependent Claim
20 words
A fingerprint data registering method as claimed in claim 2, wherein said multi-bit binary value includes 8 bits of data.
Claim 5
Dependent Claim
33 words
A fingerprint data registering method as claimed in claim 1, wherein for each pixel in said thinned image a value indicating whether or not said pixel is a configuration pixel is also stored.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-09-26 | 1998-03-28 | 1998-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-26 | 2002-03-28 | 2002-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-26 | 2006-03-28 | 2006-09-27 | $7700.00 | Window Closed / Lapsed |