Portable authentication device and method using iris patterns

• US 6,532,298 B1
• Filed: 09/14/1999
• Issued: 03/11/2003
• Est. Priority Date: 11/25/1998
• Status: Expired due to Term

• Current Assignee: Iridian Technologies, Inc. (Advent International Corporation)
• Original Assignee: Iridian Technologies, Inc. (Advent International Corporation)
• Inventors: Siedlarz, John E., Cambier, James L.
• Primary Examiner(s): MEHTA, BHAVESH M
• Application Number:
  US09/396,083
• Time in Patent Office: 1,274 Days
• Field of Search: 382/110, 382/117, 382/115, 382/116, 351/206, 351/218, 351/209, 340/5.2, 340/5.52, 340/5.53, 340/5-1-
• US Class Current: 382/117
• CPC Class Codes: A01K 11/006 Automatic identification systems for animals, e.g. electronic devices, transponders for animals identification systems for access to feeding pens A01K1/0209; ear tags with electronic identification means A01K11/004
• CPC Class Codes: A61B 3/14 Arrangements specially adapted for eye photography apparatus or arrangements for taking photographs per se G03B
• CPC Class Codes: A61B 5/7257 using Fourier transforms
• CPC Class Codes: G06F 18/00 Pattern recognition
• CPC Class Codes: G06V 40/18 Eye characteristics, e.g. of the iris
• CPC Class Codes: G06V 40/19 Sensors therefor
• CPC Class Codes: G07C 9/37 using biometric data, e.g. fingerprints, iris scans or voice recognition
• CPC Class Codes: H04L 63/0861 using biometrical features, e.g. fingerprint, retina-scan cryptographic mechanisms or cryptographic arrangements for entity authentication using biological data H04L9/3231
• CPC Class Codes: H04M 1/67 by electronic means

Abstract

A compact, handheld imaging apparatus which can be used to capture high-quality iris images for identification of a person. The handheld iris imager is non-invasive and non-contacting and comprises a camera, a cold mirror, a lens, and an illuminator. The imager has sensors and indicators which assist a user in aligning and focusing the device. The imager also automatically captures the image when proper positioning is achieved. A template of the image is then transmitted to a receiver in a vehicle or other asset and compared to a database of previously stored templates of images to identify the person. The imager is part of a security module to protect access to an asset such as a vehicle or residence. The vehicle or residence cannot be unlocked and used unless a user has been identified and authorized by the imager and a controller system.

Claims

1. A system for providing access to a vehicle or other asset, comprising:

an imager comprising;

iris acquisition means having a front surface for obtaining an image of an iris of an eye;

a lens having an image plane disposed in front of the front surface of the iris acquisition means;

a mirror disposed on a side of the lens opposite the iris acquisition means;

an illuminator disposed along a side of the mirror;

a first memory for storing an iris image obtained by the iris acquisition means;

a processor for extracting a template from the stored iris image; and

a communications interface for transmitting the template to the controller system; and

a controller system comprising;

communications interface for receiving the template from the imager;

a second memory for storing at least one template of at least one image of an iris of at least one person'"'"'s eye;

a processor for comparing the received template with the at least one template in the second memory to identify the person; and

a lock interface coupled to the processor for receiving a command from the processor responsive to the results of the comparison.

2. The system according to claim 1, wherein the iris acquisition means comprises a camera, and the mirror is a cold mirror.

3. The system according to claim 2, wherein the camera is sensitive to light having a wavelength in a range between about 400 nm and about 1100 nm.

4. The system according to claim 2, wherein the mirror reflects light having a wavelength in a range between about 400 nm and about 700 nm and passes light having a wavelength greater than about 700 nm.

5. The system according to claim 1, further comprising an input device for receiving user input.

6. The system according to claim 1, wherein the illuminator emits light having a wavelength in a range between about 680 nm and about 900 nm towards the iris of the eye being imaged.

7. The system according to claim 1, wherein the processor sends an unlock command via the lock interface to unlock the vehicle or other asset if the comparison indicates a substantial match between the received template and the at least one template stored in the second memory.

8. A method of providing access to a vehicle or other asset responsive to the identification of a person, comprising:

(a) storing image information of the iris of at least one person'"'"'s eye in a memory in a controller system;

(b) illuminating an eye of an unidentified person having an iris with an imager;

(c) obtaining an image of the iris of the unidentified person;

(d) determining if the image is an image of sufficient quality for a step (f) of extracting;

(e) repeating steps (b) through (d) until the image of sufficient quality is obtained;

(f) extracting an iris template if the image is of sufficient quality;

(g) transmitting the iris template from the imager to the controller system;

(h) at the controller system, receiving the iris template from the imager and comparing the iris template with the stored image information to identify the unidentified person; and

(i) providing access to the vehicle or other asset responsive to a result of the comparing.

9. The method according to claim 8, wherein access to the vehicle or other asset is provided via a lock interface.

10. The method according to claim 8, wherein determining if the image is an image of sufficient quality comprises focus assessment processing the image.

11. The method according to claim 8, wherein vehicle or other asset is unlocked if the comparing identifies the person.

12. The method according to claim 8, wherein providing access to the vehicle or other asset comprises unlocking the vehicle or other asset if the iris template substantially matches the stored image information and wherein the vehicle or other asset remains locked if the iris template does not substantially match the stored image information.