Patent US4658177A successfully refreshed from Google Patents.
US6546121B1
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US
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Method and apparatus for identifying an iris
Assignee: Oki Electric Industry Co Ltd
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Filing: 1999-03-05
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Granted: 2003-04-08
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Expires: 2019-03-05
Abstract
Abstract The present invention is a method and an apparatus for identifying an iris that can compare new identification code with registered identification code regardless of the slant of the face of a person to be identified because the identification code produced using a standard line does not influence the slant of the face of the person. The apparatus provides a photographing part, a standard line deriving part, an iris extracting part, a code producing part, a code registering part, and a comparison part. The photographing part photographs an area including both eyes. The standard line deriving part calculates a standard line passing through the center of both eyes. The iris extracting part extracts an iris area on the standard line by luminance distribution. The code producing part divides the iris area into a plurality of pieces, calculates a luminance for each piece and codes the luminance distribution of the pieces on the basis of the standard line. The comparison part compares the identification code produced by the code producing part with the identification code registered by the code registering part.
Inventors
- 👤 Takahiro Oda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:00
CPC Classifications
G; G06; G06V; G06V40/00; G06V40/10; G06V40/18
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
80 words
A method for identifying an iris, comprising the steps of: acquiring a part of a face including an image of both eyes; calculating a standard line passing through centers of both eyes; extracting an iris area on the standard line by luminance distribution; dividing the iris area into a plurality of pieces; calculating a luminance for each piece; and coding the luminance distribution of the plurality of the pieces on the basis of a starting pattern on the standard line.
Claim 2
Independent Claim
80 words
A method for identifying an iris, comprising the steps of: acquiring a part of a face including an image of both eyes; calculating a standard line passing through centers of both eyes; extracting an iris area on the standard line by luminance distribution; dividing the iris area into a plurality of pieces; calculating a luminance for each piece; and coding the luminance distribution of the plurality of the pieces on the basis of a starting pattern on the standard line.
Claim 3
Dependent Claim
22 words
A method according to claim 1 , wherein each piece is acquired by dividing the iris area based on circumference and radius.
Claim 4
Dependent Claim
22 words
A method according to claim 1 , wherein two codes that are coded for the iris areas of both eyes are synthesized.
Claim 5
Dependent Claim
115 words
A method according to claim 1 , further comprising the steps of calculating several points dividing an iris from a part other than the iris by the luminance distribution on two assisting standard lines lying at right angles to the standard line and passing through the center of each pupil, calculating at least one boundary standard line having a same slant as the standard line and passing through coordinates of at least one point, and extracting an iris core area based on a part of the iris surrounded by a dividing line between the iris and the pupil, a dividing line between a white of the eye and the iris, and the boundary standard line.
Claim 6
Independent Claim
134 words
An apparatus for identifying an iris, comprising: a photographing part for photographing an area including both eyes; a standard line deriving part for calculating a standard line passing through centers of both eyes; an iris extracting part for extracting an iris area on the standard line by luminance distribution; a code producing part for dividing the iris area into a plurality of pieces, calculating a luminance for each piece and coding the luminance distribution of the plurality of the pieces on the basis of a starting pattern on the standard line; a code registering part for registering a first identification code produced by the code producing part; and a comparison part for comparing a second identification code produced by the code producing part with the first identification code registered by the code registering part.
Claim 7
Independent Claim
134 words
An apparatus for identifying an iris, comprising: a photographing part for photographing an area including both eyes; a standard line deriving part for calculating a standard line passing through centers of both eyes; an iris extracting part for extracting an iris area on the standard line by luminance distribution; a code producing part for dividing the iris area into a plurality of pieces, calculating a luminance for each piece and coding the luminance distribution of the plurality of the pieces on the basis of a starting pattern on the standard line; a code registering part for registering a first identification code produced by the code producing part; and a comparison part for comparing a second identification code produced by the code producing part with the first identification code registered by the code registering part.
Claim 8
Dependent Claim
21 words
An apparatus according to claim 5 , wherein the code producing part divides the iris area based on circumference and radius.
Claim 9
Dependent Claim
25 words
An apparatus according to claim 5 , wherein the code producing part synthesizes two codes that are coded for the iris areas of both eyes.
Claim 10
Dependent Claim
115 words
An apparatus according to claim 5 , further comprising a pre-processing part calculating several points dividing an iris from a part other than the iris by the luminance distribution on two assisting standard lines lying at right angles to the standard line and passing through the center of each pupil, calculating at least one boundary standard line having a same slant as the standard line and passing through coordinates of at least one point, and extracting an iris core area based on a part of the iris surrounded by a dividing line between the iris and the pupil, a dividing line between a white of the eye and the iris, and the boundary standard line.
Claim 11
Dependent Claim
22 words
An apparatus according to claim 5 , wherein the photographing part further comprises a lighting unit irradiating infrared light toward both eyes.
Claim 12
Independent Claim
118 words
An apparatus for changing data, comprising: a photographing part for photographing an area including both eyes; a standard line deriving part for calculating a standard line passing through centers of both eyes; an iris extracting part for extracting an iris area on the standard line by luminance distribution; a code producing part for dividing the iris area into a plurality of pieces, calculating a luminance for each piece and coding the luminance distribution of the plurality of the pieces on the basis of a starting pattern on the standard line to obtain a code; and a changing part for changing the data by using the code produced by the code producing part in accordance with a predetermined function.
Claim 13
Independent Claim
118 words
An apparatus for changing data, comprising: a photographing part for photographing an area including both eyes; a standard line deriving part for calculating a standard line passing through centers of both eyes; an iris extracting part for extracting an iris area on the standard line by luminance distribution; a code producing part for dividing the iris area into a plurality of pieces, calculating a luminance for each piece and coding the luminance distribution of the plurality of the pieces on the basis of a starting pattern on the standard line to obtain a code; and a changing part for changing the data by using the code produced by the code producing part in accordance with a predetermined function.
Claim 14
Dependent Claim
34 words
A method according to claim 1 , wherein the luminance distribution of the plurality of the pieces is coded on the basis of the starting pattern and an ending pattern on the standard line.
Claim 15
Dependent Claim
34 words
An apparatus according to claim 5 , wherein the luminance distribution of the plurality of the pieces is coded on the basis of the starting pattern and an ending pattern on the standard line.
Claim 16
Dependent Claim
34 words
An apparatus according to claim 10 , wherein the luminance distribution of the plurality of the pieces is coded on the basis of the starting pattern and an ending pattern on the standard line.
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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) | 2006-04-07 | 2006-10-07 | 2007-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-04-07 | 2010-10-07 | 2011-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-04-07 | 2014-10-07 | 2015-04-08 | $7700.00 | Window Closed / Lapsed |