Method and apparatus for three-dimensional tracking of infra-red beacons

• US 20130077826A1
• Filed: 11/05/2012
• Published: 03/28/2013
• Est. Priority Date: 04/11/2003
• Status: Active Grant

• Current Assignee: Bradford H. Needham, David J. Cowperthwaite
• Original Assignee: Bradford H. Needham, David J. Cowperthwaite
• Inventors: Needham, Bradford H., Cowperthwaite, David J.
• Granted Patent: US 9,122,945 B2
• Time in Patent Office: Days
• US Class Current: 382/103
• CPC Class Codes: G01S 2201/01 adapted for specific applications or environments
• CPC Class Codes: G01S 5/16 using electromagnetic waves other than radio waves

Abstract

A method for processing data includes identifying a time signature of an infra-red (IR) beacon. Image data associated with the IR beacon is identified using the time signature.

Claims

1. A method for processing data, comprising:

identifying time signatures generated by a plurality of infra-red (IR) beacons where each of the time signatures includes a unique transmission of an IR signal; and

creating a historical profile for the IR beacons based on the time signatures identified, wherein at least one of the identifying and creating procedures is performed by a processor.

2. The method of claim 1, wherein creating the historical profile for the IR beacons comprises generating a log that includes three-dimensional coordinates of positions of the IR beacons over a period of time.

3. The method of claim 2, further comprising comparing the historical profile of a first IR beacon with a previous historical profile of the first IR beacon.

4. The method of claim 2, further comprising comparing the historical profile of a first IR beacon with a historical profile of a second IR beacon.

5. The method of claim 3, wherein comparing the historical profile of the first IR beacon with the previous historical profile of the first IR beacon comprises comparing three dimensional coordinates of the first IR beacon from the historical profile of the first IR beacon with three dimensional coordinates of the first IR beacon from the previous historical profile.

6. The method of claim 3, wherein comparing the historical profile of the first IR beacon with the previous historical profile of the first IR beacon comprises comparing durations of time where the first IR beacon has been at a location.

7. The method of claim 1, further comprising accessing image data associated with the IR beacons using the time signatures.

8. The method of claim 1, wherein identifying the time signatures of the IR beacons comprises determining when the IR beacons transmit IR identifiers.

9. The method of claim 1, wherein accessing the image data comprises retrieving three-dimensional positions of the IR beacons.

10. The method of claim 7, wherein accessing image data associated with the IR beacons comprises accessing image frames generated from a plurality of cameras detecting IR transmissions at times corresponding to the time signatures.

11. A non-transitory computer-readable medium having stored thereon sequences of instructions, the sequences of instructions including instructions which, when executed by a processor, causes the processor to perform a method comprising:

identifying time signatures generated by a plurality of infra-red (IR) beacons where each of the time signatures includes a unique transmission of an IR signal; and

creating a historical profile for the IR beacons based on the time signatures identified.

12. The non-transitory computer-readable medium of claim 11, wherein creating the historical profile for the IR beacons comprises generating a log that includes three-dimensional coordinates of positions of the IR beacons over a period of time.

13. The non-transitory computer-readable medium of claim 12, wherein the method further comprises comparing the historical profile of a first IR beacon with a previous historical profile of the first IR beacon.

14. The non-transitory computer-readable medium of claim 12, wherein the method further comprises comparing the historical profile of a first IR beacon with a historical profile of a second IR beacon.

15. The non-transitory computer-readable medium of claim 13, wherein comparing the historical profile of the first IR beacon with the previous historical profile of the first IR beacon comprises comparing three dimensional coordinates of the first IR beacon from the historical profile of the first IR beacon with three dimensional coordinates of the first IR beacon from the previous historical profile.

16. The non-transitory computer-readable medium of claim 13, wherein comparing the historical profile of the first IR beacon with the previous historical profile of the first IR beacon comprises comparing durations of time where the first IR beacon has been at a location.

17. The non-transitory computer-readable medium of claim 11, wherein the method further comprises identifying image data associated with the IR beacons using the time signatures of the IR beacons.

18. The non-transitory computer-readable medium of claim 17, wherein identifying the time signatures of the IR beacons comprises determining when the IR beacons transmit an IR identifier.

19. The non-transitory computer-readable medium of claim 17, wherein identifying the image data comprises retrieving three-dimensional positions of the IR beacons.

20. A tracking unit implemented by a processor, comprising:

an image frame identifier to identify time signatures generated by a plurality of infra-red (IR) beacons where each of the time signatures includes a unique transmission of an IR signal; and

a profile generator to create a historical profile for the IR beacons based on the time signatures identified.

21. The tracking unit of claim 20, further comprising a triangulation unit to access image data associated with the IR beacons using the time signature of the IR beacons to determine a three-dimensional position of the non-stationary IR beacon.