US7099495B2
Expired / Lapsed
US
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Frequency and resolution analyzed biometric authentication method and device
Assignee: Panasonic Corp
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Filing: 2002-02-27
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Granted: 2006-08-29
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Expires: 2022-02-27
Abstract
Abstract During registration, an iris image taken is frequency-analyzed using a plurality of frequencies f 1 to fn to generate features for the respective frequencies f 1 to fn. During authentication, frequencies f 2 to fn are selected from the frequencies f 1 to fn for use in frequency analysis for authentication. An iris image of a person to be authenticated taken is frequency-analyzed using the selected frequencies f 2 to fn to generate features for the respective frequencies f 2 to fn. The generated features are compared with the features generated for the same frequencies during the registration to perform personal authentication.
Inventors
- 👤 Kenji Kodno
- 👤 Kenya Uomori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:19
CPC Classifications
G; G06; G06V; G06V40/00; G06V40/10; G06V40/18; G06V40/193; G06F; G06F21/00; G06F21/30; G06F21/31; G06F21/32; G06V40/197; G06V40/50; G07; G07C; G07C9/00; G07C9/00174; G07C9/00563
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
133 words
A personal authentication method using biological information, wherein during registration, acquired biological information is frequency-analyzed using a plurality of frequencies to generate a feature for each frequency and register the feature, and wherein the method comprises the steps of: selecting a frequency used for frequency analysis for authentication from the plurality of frequencies; performing frequency analysis for acquired biological information of a person to be authenticated using the selected frequency to generate a feature for the frequency; comparing the generated feature with the feature generated for the same frequency during the registration to perform personal authentication; wherein the biological information is an image of an iris of an eye; and wherein the selection of the frequency during the authentication is performed based on a resolution of an iris image taken during the authentication.
Claim 2
Dependent Claim
133 words
A personal authentication method using biological information, wherein during registration, acquired biological information is frequency-analyzed using a plurality of frequencies to generate a feature for each frequency and register the feature, and wherein the method comprises the steps of: selecting a frequency used for frequency analysis for authentication from the plurality of frequencies; performing frequency analysis for acquired biological information of a person to be authenticated using the selected frequency to generate a feature for the frequency; comparing the generated feature with the feature generated for the same frequency during the registration to perform personal authentication; wherein the biological information is an image of an iris of an eye; and wherein the selection of the frequency during the authentication is performed based on a resolution of an iris image taken during the authentication.
Claim 3
Dependent Claim
20 words
The method of claim 1 , wherein the resolution of the iris image is determined from the iris image itself.
Claim 4
Dependent Claim
36 words
The method of claim 2 , wherein the resolution of the iris image is determined based on the length of a circumference corresponding to the boundary between the iris and the pupil of the iris image.
Claim 5
Dependent Claim
35 words
The method of claim 1 , wherein the resolution of the iris image is determined by predicting a size of the iris taken from information on an apparatus with which the iris image was taken.
Claim 6
Dependent Claim
121 words
A personal authentication method using biological information, wherein during registration, acquired biological information is frequency-analyzed using a plurality of frequencies to generate a feature for each frequency and register the feature, and wherein the method comprises the steps of: selecting a frequency used for frequency analysis for authentication from the plurality of frequencies; performing frequency analysis for acquired biological information of a person to be authenticated using the selected frequency to generate a feature for the frequency; comparing the generated feature with the feature generated for the same frequency during the registration to perform personal authentication; and wherein the authentication precision is calculated using a distribution of authentication scores between identical persons and a distribution of authentication scores between different persons.
Claim 7
Dependent Claim
121 words
A personal authentication method using biological information, wherein during registration, acquired biological information is frequency-analyzed using a plurality of frequencies to generate a feature for each frequency and register the feature, and wherein the method comprises the steps of: selecting a frequency used for frequency analysis for authentication from the plurality of frequencies; performing frequency analysis for acquired biological information of a person to be authenticated using the selected frequency to generate a feature for the frequency; comparing the generated feature with the feature generated for the same frequency during the registration to perform personal authentication; and wherein the authentication precision is calculated using a distribution of authentication scores between identical persons and a distribution of authentication scores between different persons.
Claim 8
Dependent Claim
110 words
A personal authentication method using biological information, wherein during registration, acquired biological information is frequency-analyzed using a plurality of frequencies to generate a feature for each frequency and register the feature, and wherein the method comprises the steps of: selecting a frequency used for frequency analysis for authentication from the plurality of frequencies; performing frequency analysis for acquired biological information of a person to be authenticated using the selected frequency to generate a feature for the frequency; comparing the generated feature with the feature generated for the same frequency during the registration to perform personal authentication; and wherein the authentication precision during the authentication is estimated from the selected frequency.
Claim 9
Dependent Claim
110 words
A personal authentication method using biological information, wherein during registration, acquired biological information is frequency-analyzed using a plurality of frequencies to generate a feature for each frequency and register the feature, and wherein the method comprises the steps of: selecting a frequency used for frequency analysis for authentication from the plurality of frequencies; performing frequency analysis for acquired biological information of a person to be authenticated using the selected frequency to generate a feature for the frequency; comparing the generated feature with the feature generated for the same frequency during the registration to perform personal authentication; and wherein the authentication precision during the authentication is estimated from the selected frequency.
Claim 10
Dependent Claim
30 words
The method of claim 6 , wherein the authentication precision is estimated using a distribution of authentication distances between identical persons and a distribution of authentication distances between different persons.
Claim 11
Dependent Claim
27 words
The method of claim 6 , wherein whether or not the person to be authenticated should be finally authenticated is judged according to the estimated authentication precision.
Claim 12
Dependent Claim
29 words
The method of claim 6 , wherein a right to be bestowed on the person to be authenticated after the authentication is controlled according to the estimated authentication precision.
Claim 13
Dependent Claim
21 words
The method of claim 6 , wherein whether or not re-authentication is performed is judged according to the estimated authentication precision.
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