Filing Information

Inventor(s)	Kenji Kondo · Kenya Uomori ·
Assignee(s)	Panasonic Corporation ·  View assignee updates
Attorney/Agent(s)	Harness, Dickey & Pierce, P.L.C. ·
Primary Examiner	Matthew C Bella ·
Assistant Examiner	Hadi Akhavannik ·
Application Number	US11429570
Filing date	05/05/2006
Issue date	07/21/2009
Prior Publication Data	US20060210123 - 09/21/2006
Predicted expiration date	09/03/2022
Patent term adjustment	188
U.S. Classifications	382/117  ·
International Classifications	G06K900  ·
Kind Code	B2
Related U.S. Application Data	CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of U.S. patent application Ser. No. 10/084,107 filed on Feb. 27, 2002 which claims the benefit of Japanese Patent Application No. 2001-053602 filed Feb. 28, 2001. The disclosure(s) of the above application(s) are incorporated herein by reference.
Foreign Priority	JP2001053602 - 02/28/2001 ·

Patent Family

Abstract

During registration, an iris image taken is frequency-analyzed using a plurality of frequencies f1 to fn to generate features for the respective frequencies f1 to fn. During authentication, frequencies f2 to fn are selected from the frequencies f1 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 f2 to fn to generate features for the respective frequencies f2 to fn. The generated features are compared with the features generated for the same frequencies during the registration to perform personal authentication.

Independent Claims | See all claims (13)

1. 1. A personal authentication method using iris image, wherein during registration, acquired iris image is frequency-analyzed using a plurality of band-pass filters having different passbands from each other to generate a feature for each passband and register the feature, and wherein the method comprises the steps of: acquiring an iris image of a person to be authenticated using a first apparatus different in resolution performance from a second apparatus used during registration; selecting at least one passband from the passbands of the plurality of band-pass filters; performing frequency analysis for the acquired iris image of the person to be authenticated using at least one band-pass filter having the selected passband to generate a feature for the selected passband; and comparing the generated feature with the feature generated for the same passband during the registration to perform personal authentication, wherein the selection of the passband during the authentication is performed based on a resolution of the acquired iris image during the authentication.
2. 6. A personal authentication method using iris image, wherein during registration, acquired iris image is frequency-analyzed using a plurality of band-pass filters having different passbands from each other to generate a feature for each passband and register the feature, and wherein the method comprises the steps of: acquiring an iris image of a person to be authenticated using a first apparatus different in resolution performance from a second apparatus used during registration; selecting at least one passband from the passbands of the plurality of band-pass filters; performing frequency analysis for the acquired iris image of the person to be authenticated using at least one band-pass filter having the selected passband to generate a feature for the selected passband; and comparing the generated feature with the feature generated for the same passband during the registration to perform personal authentication, wherein during registration, a plurality of combinations each including two or more features selected from the generated features are generated and authentication precision for each combination is calculated, and wherein the selection of the passband during the authentication is performed based on the calculated authentication precision, wherein the authentication precision is calculated using a distribution of authentication scores between identical persons and a distribution of authentication scores between different persons.
3. 7. A personal authentication method using iris image, wherein during registration, acquired iris image is frequency-analyzed using a plurality of band-pass filters having different passbands from each other to generate a feature for each passband and register the feature, and wherein the method comprises the steps of: acquiring an iris image of a person to be authenticated using a first apparatus different in resolution performance from a second apparatus used during registration; selecting at least one passband from the passbands of the plurality of band-pass filters; performing frequency analysis for the acquired iris image of the person to be authenticated using at least one band-pass filter having the selected passband to generate a feature for the selected passband; and comparing the generated feature with the feature generated for the same passband during the registration to perform personal authentication, wherein an authentication precision during the authentication is estimated from the selected passband.
4. 12. A personal authentication device using iris image, wherein during registration, acquired iris image is frequency-analyzed using a plurality of band-pass filters having different passbands from each other to generate a feature for each passband and register the feature, and wherein the device comprises: a first apparatus for acquiring an iris image of a person to be authenticated, the first apparatus being different in resolution performance from a second apparatus used during registration; means for selecting at least one passband from the passbands of the plurality of band-pass filters; means for performing frequency analysis for the acquired iris image by the first apparatus using at least one band-pass filter having the selected passband to generate a feature for the selected passband; and means for comparing the generated feature with the feature generated for the same passband during the registration to perform personal authentication, wherein the selecting means performs the selection of passband based on a resolution of the acquired iris image by the first apparatus.
5. 13. A personal authentication device using iris image, wherein during registration, acquired iris image is frequency-analyzed using a plurality of band-pass filters having different passbands from each other to generate a feature for each passband and register the feature, and wherein the device comprises: a first apparatus for acquiring an iris image of a person to be authenticated, the first apparatus being different in resolution performance from a second apparatus used during registration; means for selecting at least one passband from the passbands of the plurality of band-pass filters; means for performing frequency analysis for the acquired iris image by the first apparatus using at least one band-pass filter having the selected passband to generate a feature for the selected passband; and means for comparing the generated feature with the feature generated for the same passband during the registration to perform personal authentication, wherein during the registration, a plurality of combinations each including two or more features selected from the generated features are generated and authentication precision for each combination is calculated, and wherein the selecting means performs the selection of passband based on the calculated authentication precision, wherein the authentication precision is calculated using a distribution of authentication scores between identical persons and a distribution of authentication scores between different persons.