Personal identification system

• US 7,277,163 B2
• Filed: 04/13/2005
• Issued: 10/02/2007
• Est. Priority Date: 09/20/2000
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Umemura, Shin-ichiro, Ito, Yoshitoshi, Kono, Miyuki, Miyatake, Takafumi, Harada, Kunio, Ueki, Hironori
• Primary Examiner(s): Rosenberger; Richard A.
• Application Number:
  US11/104,564
• Publication Number:
  US 20050185827A1
• Time in Patent Office: 902 Days
• Field of Search: 356/71
• US Class Current: 356/71
• CPC Class Codes: G06F 18/00 Pattern recognition
• CPC Class Codes: G06V 10/10 Image acquisition document image scanning and transmission H04N1/00; control of digital cameras H04N23/60
• CPC Class Codes: G06V 40/14 Vascular patterns
• CPC Class Codes: G06V 40/145 Sensors therefor

Abstract

A personal identification system, which uses a vein pattern of a finger, optimizes the amount of light of a light source based on a captured finger image and emphasizes the vein pattern during image processing for identification.

Claims

1. A personal identification apparatus comprising:

a positioning device that positions a body part of the person in a predetermined region;

a light source that radiates light onto the body part;

an imaging unit which captures a transmitted light from the body part irradiated by the light and creates an image from the captured transmitted light;

an image processing unit which processes the image so as to enhance or extract a blood vessel pattern included in the image, compares the blood vessel pattern with at least one registered blood vessel pattern stored in the personal identification apparatus, and identifies the person,

wherein the image processing unit detects a setting of the identification region to the position from the image created by the image unit, and starts the irradiation with the light source.

2. A personal identification apparatus according to claim 1,

wherein the body part is a finger.

3. A personal identification apparatus according to claim 2,

wherein the light source irradiates light to detect a positioning of the body part before irradiating the light onto the body part to create the image.

4. A personal identification apparatus according to claim 2,

wherein the light source comprises a plurality of light-emitting elements.

5. A personal identification apparatus according to claim 2,

wherein, the positioning device is sterilized.

6. A personal identification apparatus according to claim 2, further comprising:

a memory to store at least one feature quantity of a blood vessel pattern as the at least one registered blood vessel pattern along with information of at least one person to be identified.

7. A personal identification apparatus according to claim 2, further comprising:

input means that inputs personal information to select one of the registered blood vessel patterns corresponding to the information.

8. A personal identification apparatus according to claim 7,

wherein the input means is selected from a group consisting of a voice input device, an IC card and a keyboard.

9. A personal identification apparatus according to claim 2,

wherein the at least one registered blood vessel pattern is stored in a medium connected to an authentication server or a portable medium.

10. A personal identification apparatus according to claim 1,

wherein the light source irradiates light to detect a positioning of the body part before irradiating the light on to the body part to create the image.

11. A personal identification apparatus according to claim 10,

wherein the light source comprises a plurality of light-emitting elements.

12. A personal identification apparatus according to claim 1,

wherein the light source comprises a plurality of light-emitting elements.

13. A personal identification apparatus according to claim 1,

wherein the positioning device is sterilized.

14. A personal identification apparatus according to claim 1, further comprising:

a memory to store at least one feature quantity of a blood vessel pattern as the at least one registered blood vessel pattern along with information of at least one person to be identified.

15. A personal identification apparatus according to claim 1, further comprising:

input means that inputs personal information to select one of the registered blood vessel patterns corresponding to the information.

16. A personal identification apparatus according to claim 15,

wherein the input means is selected from a group consisting of a voice input device, an IC card and a keyboard.

17. A personal identification apparatus according to claim 1,

wherein the at least one registered blood vessel pattern is stored in a medium connected to an authentication server or a portable medium.

18. A personal identification method comprising the steps of:

illuminating an area at which a body part of a person is to be located with a light having a first intensity;

detecting the body part in response to the light being interrupted by the body part;

irradiating the body part with a light having a second intensity stronger than the first intensity;

capturing a transmitted light from the body part;

processing an image created from the captured transmitted light so as to enhance or extract a blood vessel pattern included in the image;

comparing the blood vessel pattern with one or plurality of registered blood vessel patterns stored in the personal identification apparatus;

identifying the person when the maximum correlation value between the extracted or enhanced blood vessel pattern and the one or one of the plurality of registered blood vessel patterns is larger than a predetermined threshold value; and

outputting data regarding the person identified.

19. A personal identification method according to claim 18,

wherein the body part is a finger.

20. A personal identification apparatus, comprising:

a positioning device that positions a finger of a person in a predetermined region;

a light source configured to selectively irradiate a first light having a first intensity and a second light having a second intensity stronger than the first intensity, the light source irradiating the second light to the finger in response to the finger being detected by detecting interruption of the first light by the finger;

an imaging unit which captures transmitted light derived from the second light through the finger and creates an image from the transmitted light; and

an image processing unit which processes the image so as to enhance or extract a blood vessel pattern of the finger included in the image, compares the blood vessel pattern with at least one registered blood vessel pattern stored in the personal identification apparatus, and identifies the person.