APPARATUS AND METHOD FOR HAND MOTION DETECTION AND HAND MOTION TRACKING GENERALLY

• US 20110248964A1
• Filed: 02/10/2011
• Published: 10/13/2011
• Est. Priority Date: 04/09/2001
• Status: Active Grant

• Current Assignee: I.C. + Technologies Ltd.
• Original Assignee: I.C. + Technologies Ltd.
• Inventors: Vardi, Micha
• Granted Patent: US 8,686,976 B2
• Time in Patent Office: Days
• US Class Current: 345/179
• CPC Class Codes: G06F 3/03545 Pens or stylus
• CPC Class Codes: G06F 3/0383 Signal control means within the pointing device
• CPC Class Codes: G06F 3/046 by electromagnetic means
• CPC Class Codes: G06V 30/1423 the instrument generating sequences of position coordinates corresponding to handwriting preprocessing or recognising digital ink G06V30/32
• CPC Class Codes: G06V 30/228 of three-dimensional handwriting, e.g. writing in the air

Abstract

Apparatus and method for hand motion tracking including a hand-held device including at least one accelerometer providing an acceleration indicating output, computation circuitry receiving the acceleration indicating output and providing a non-user specific output and a hand motion tracker receiving the non-user specific output and providing a tracking output indication.

Claims

1. (canceled)

2. (canceled)

3. Apparatus for motion tracking comprising:

a hand-held device comprising at least one accelerometer adapted to provide a first set of samples including acceleration information;

computational circuitry adapted to employ examination of at least part of the first set of samples for providing a second set of samples indicating a motion information included in the first set of samples; and

hand motion tracking circuitry adapted to use the second set of samples for providing motion tracking output indication.

4. Apparatus according to claim 3, wherein the second set is a subset of the first set.

5. Apparatus according to claim 3, wherein the second set includes acceleration indications.

6. Apparatus according to claim 3, wherein the second set includes velocity indications.

7. Apparatus according to claim 3, wherein the second set includes displacement indications.

8. Apparatus according to claim 3, wherein the size of the second set is smaller than the size of the first set by at least few percentages.

9. Apparatus according to claim 3, wherein the acceleration information included in the first set includes at least one of a digital output and a filtered output.

10. A method for motion tracking comprising:

providing a first set of samples including acceleration information from a hand-held device;

examination of at least part of the first set of samples for providing a second set of samples indicating a motion information included in the first set of samples; and

using the second set of samples for providing tracking output indication.

11. A method according to claim 10, wherein the second set is a subset of the first set.

12. A method according to claim 10, wherein the second set includes acceleration indications.

13. A method according to claim 10, wherein the second set includes velocity indications.

14. A method according to claim 10, wherein the second set includes displacement indications.

15. A method according to claim 10, wherein the size of the second set is smaller than the size of the first set by at least few percentages.

16. A method according to claim 10, wherein the acceleration information included in the first set includes at least one of a digital output and a filtered output.

17. Apparatus for motion tracking comprising:

a hand-held device comprising at least one accelerometer providing an acceleration indicating output;

computation circuitry adapted to employ the acceleration indicating output and further adapted to employ compression for providing a compressed motion indication output; and

a hand motion tracker adapted to employ the compressed motion indication output and to provide a tracking output indication.

18. Apparatus according to claim 17, wherein the compressed motion indication output includes velocity indicating output.

19. Apparatus according to claim 17, wherein said computation circuitry is adapted to provide the compressed motion indication output by employing digitization operation.

20. Apparatus according to claim 17, wherein. the compressed motion indication output includes binary indication.

21. Apparatus according to claim 17, wherein the acceleration indicating output includes at least one of a digital output or a filtered output.

22. Apparatus according to claim 17, wherein said computation circuitry is adapted to provide the compressed motion indication output by applying at least one threshold.

23. Apparatus according to claim 17, wherein the compressed motion indication output indicates a subset of the information included in the acceleration indicating output.

24. A method for motion tracking comprising:

providing an acceleration indicating output from a hand-held device;

processing the acceleration indicating output for providing a compressed motion indication output; and

employing the compressed motion indication output and providing a tracking output indication.

25. A method according to claim 24, wherein the compressed motion indication output includes velocity indicating output.

26. A method according to claim 24, wherein the processing provides a compressed motion indication output by employing digitization operation.

27. A method according to claim 24, wherein. the processing provides a compressed motion indication output by employing binarization.

28. A method according to claim 24, wherein the acceleration indicating output includes at least one of a digital output or a filtered output.

29. A method according to claim 24, wherein the processing is providing a compressed motion indication output by applying at least one threshold.

30. A method according to claim 24, wherein the compressed motion indication output indicates a subset of the information included in the acceleration indicating output.