Auto calibration and personalization of eye tracking system using larger field of view imager with higher resolution

• US 6,873,714 B2
• Filed: 02/19/2002
• Issued: 03/29/2005
• Est. Priority Date: 02/19/2002
• Status: Expired due to Term

• Current Assignee: Aptiv Technologies Limited (BorgWarner Incorporated)
• Original Assignee: Delphi Technologies, Inc. (BorgWarner Incorporated)
• Inventors: Witt, Gerald J., Scharenbroch, Gregory K., Li, Jianhua
• Primary Examiner(s): Wu, Jingge
• Assistant Examiner(s): Hesseltine, Ryan J.
• Application Number:
  US10/078,871
• Publication Number:
  US 20030156742A1
• Time in Patent Office: 1,134 Days
• Field of Search: 382/103, 382/115, 382/116, 382/117, 382/118, 340/5.53, 340/5.83, 345/7, 345/8, 345/9, 348/78, 351/209, 351/210
• US Class Current: 382/118
• CPC Class Codes: A61B 3/113 for determining or recording eye movement
• CPC Class Codes: G06V 30/244 using graphical properties, e.g. alphabet type or font
• CPC Class Codes: G06V 40/16 Human faces, e.g. facial parts, sketches or expressions
• 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: G08B 21/06 indicating a condition of sleep, e.g. anti-dozing alarms

Abstract

In preferred embodiments, apparatus for and method of eye tracking, including, in sequence, the steps of: viewing an entire face of a person to obtain predetermined facial features of the person to identify or not the said person; if the person is identified, retrieving a previously stored ocular profile of the person based on said predetermined facial features; using said ocular profile to track movement of an eye of said person. If the person is not identified, an ocular profile is created.

Claims

1. A method of eye tracking, comprising, in sequence, the steps of:

(a) viewing an entire face of a person to obtain predetermined facial features of said person to identify or not said person;

(b) if said person is identified, retrieving a previously stored ocular profile of said person based on said predetermined facial features;

(c) using said ocular profile to track movement of an eye of said person.

2. A method of eye tracking, as defined in claim 1, wherein:

said steps are performed automatically.

3. A method of eye tracking, as defined in claim 1, wherein said step of using said ocular profile views said entire face of said person.

4. A method of eye tracking, as defined in claim 1, wherein:

if said person is not recognized, such information is used to restrict how a vehicle is to be operated and/or to restrict access to certain areas of a vehicle.

5. A method of eye tracking, as defined in claim 1, wherein:

following step (a), if said person is not recognized, viewing only an eye of said person to create an ocular profile of said eye and using said ocular profile in step (c).

6. A method of eye tracking, as defined in claim 1, wherein:

steps (a) and (c) are performed using SXGA resolution in a eye tracking system.

7. A method of eye tracking, as defined in claim 5, wherein said step of creating an ocular profile uses SXGA resolution in an eye tracking system.

8. A method of eye tracking, as defined in claim 1, wherein said step of using said ocular profile includes illuminating said eye with infrared radiation and using reflection of said infrared radiation for eye tracking.

9. A method of eye tracking, as defined in claim 1, wherein:

if eye contact is lost, viewing said entire face of said person to determine the location of said eye.

10. An apparatus for eye tracking, comprising:

(a) an optical receiver to view an entire face of a person to obtain predetermined facial features and to produce a signal representative of said facial features;

(b) infrared illumination to cause a reflection from an eye of said person; and

(c) a controller to receive said signal and, if said person is recognized from said facial features, to retrieve a stored ocular profile of said reflection and to use said ocular profile for eye tracking while viewing said entire face of said person.

11. An apparatus for eye tracking, as defined in claim 10, wherein:

if said person is not recognized, said controller causes said optical receiver to view only said eye of said person and uses such information to create an ocular profile therefor for use in eye tracking.

12. An apparatus for eye tracking, as defined in claim 10, wherein:

all elements of said apparatus operate automatically.

13. An apparatus for eye tracking, as defined in claim 10, wherein:

all elements of said apparatus operate without mechanical linkages.

14. An apparatus for eye tracking, as defined in claim 10, wherein:

said apparatus uses SXGA resolution.

15. An apparatus for eye tracking, as defined in claim 10, wherein:

if said person is not recognized, said controller restricts how a vehicle can be operated and/or restricts access to certain areas of said vehicle.

16. An apparatus for eye tracking, as defined in claim 10, wherein:

if contact with said eye is lost, said controller uses said entire face of said person to locate said eye.