IDENTIFICATION APPARATUS, IDENTIFICATION METHOD, AND PROGRAM

• US 20130004032A1
• Filed: 09/11/2012
• Published: 01/03/2013
• Est. Priority Date: 03/19/2010
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: ABIKO, Yukihiro
• Granted Patent: US 9,129,145 B2
• Time in Patent Office: Days
• US Class Current: 382/124
• CPC Class Codes: G06V 40/1365 Matching; Classification

Abstract

An identification apparatus includes a classification unit that determines two or more classes into which input biometric data is classified out of a plurality of classes based on features of the input biometric data, where a plurality of items of registered biometric data have been classified into at least one of the plurality of classes, a calculation unit that calculates similarity between the input biometric data and each item of the registered biometric data registered in each of the two or more classes into which the input biometric data is classified, and an identification unit that identifies data on a user who has entered the input biometric data among the registered biometric data registered in any of the two or more classes into which the input biometric data is classified, based on the similarity to the input biometric data.

Claims

1. An identification apparatus comprising:

a classification unit that determines two or more classes into which input biometric data is classified out of a plurality of classes based on features of the input biometric data, where a plurality of items of registered biometric data have been classified into at least one of the plurality of classes;

a calculation unit that calculates similarity between the input biometric data and each item of the registered biometric data registered in each of the two or more classes into which the input biometric data is classified; and

an identification unit that identifies data on a user who has entered the input biometric data among the registered biometric data registered in any of the two or more classes, based on the similarity to the input biometric data.

2. The identification apparatus according to claim 1, further comprising a setting unit that sets a threshold for each of the two or more classes in order to identify data on the user who has entered the input biometric data, wherein

when, among the registered biometric data registered in each of the two or more classes, there is at least one biometric data item whose similarity to the input biometric data exceeds the threshold set for each of the two or more classes, the identification unit identifies that the input biometric data and the registered biometric data item belong to the same user.

3. The identification apparatus according to claim 2, wherein the setting unit sets the threshold for each of the two or more classes based on a false accept rate expected of the identification apparatus and a false accept rate expected of each of the two or more classes.

4. The identification apparatus according to claim 1, further comprising a registration unit that registers the biometric data entered during registration into the two or more classes determined by the classification unit.

5. The identification apparatus according to claim 1, further comprising an extraction unit that extracts at least one partial region from the input biometric data,

wherein, based on a feature included in the at least one partial region, the classification unit determines two or more classes into which the at least one partial region is classified, and

the calculation unit calculates similarity between the at least one partial region and the partial region registered in each of the two or more classes into which the at least one partial region is classified.

6. The identification apparatus according to claim 1, further comprising:

a detection unit that detects an input state of the input biometric data;

an estimation unit that estimates a method for improving the input state of the input biometric data; and

a notification unit that notifies the user of the method for improving the input state of the input biometric data.

7. An identification method executed by a computer, comprising:

determining two or more classes into which input biometric data is classified out of a plurality of classes based on features of the input biometric data, where a plurality of items of registered biometric data have been classified into at least one of the plurality of classes;

calculating similarity between the input biometric data and each item of the registered biometric data registered in each of the two or more classes into which the input biometric data is classified; and

identifying data on a user who has entered the input biometric data among the registered biometric data registered in any of the two or more classes, based on the similarity to the input biometric data.

8. A non-transitory computer-readable recording medium recording thereon a program executed by a computer, the program comprising:

determining two or more classes into which input biometric data is classified out of a plurality of classes based on features of the input biometric data, where a plurality of items of registered biometric data have been classified into at least one of the plurality of classes;

calculating similarity between the input biometric data and each item of the registered biometric data registered in each of the two or more classes into which the input biometric data is classified; and

identifying data on a user who has entered the input biometric data among the registered biometric data registered in any of the two or more classes, based on the similarity to the input biometric data.