COMPUTER VISION CONTROL VARIABLE TRANSFORMATION

• US 20010040572A1
• Filed: 12/01/1998
• Published: 11/15/2001
• Est. Priority Date: 12/01/1998
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: BRADSKI, GARY R., HOLLER, MARK A., BOLLER, RYAN A.
• Granted Patent: US 6,538,649 B2
• Time in Patent Office: Days
• US Class Current: 345/419
• CPC Class Codes: A63F 2300/1093 using visible light
• CPC Class Codes: A63F 2300/69 Involving elements of the real world in the game world, e.g. measurement in live races, real video
• CPC Class Codes: G06F 3/011 Arrangements for interaction with the human body, e.g. for user immersion in virtual reality blind teaching G09B21/00
• CPC Class Codes: G06F 3/012 Head tracking input arrangements

Abstract

The generation of control variables for computer vision is disclosed. In one embodiment of the invention, a computerized system includes a video camera and a controller. The video camera tracks an object, such as the head of a user of the computer. The controller generates control variables having sensitivity to movement of the object that varies in accordance with movement of the object from a neutral position.

Claims

1. A computerized system comprising:

a video camera to track an object; and

,

a controller to generate control variables having sensitivity to movement of the object that varies in accordance with movement of the object from a neutral position.

2. The computerized system of

claim 1

, wherein the video camera is to control an absolute graphics camera viewpoint of a three-dimensional scene.

3. The computerized system of

claim 1

, wherein the control variables are more sensitive to movement of the object as the object moves away from the neutral position.

4. The computerized system of

claim 1

, wherein the control variables are less sensitive to movement of the object as the object moves away from the neutral position.

5. The computerized system of

claim 1

, wherein the object is movable across different ranges, each range corresponding to a different sensitivity of the control variables.

6. The computerized system of

claim 5

, wherein the ranges are divided into first ranges along a first axis and second ranges along a second axis.

7. The computerized system of

claim 6

, wherein the first axis is perpendicular to the second axis.

8. The computerized system of

claim 1

, further comprising a display having a three-dimensional scene through which movement is controlled in accordance with the control variables.

9. The computerized system of

claim 8

, wherein the movement through the three-dimensional scene takes into account a rendered frame rate of the scene so that rate of movement through the scene is substantially independent of complexity of the scene.

10. The computerized system of

claim 1

, further comprising a display having a three-dimensional scene about which movement is controlled in accordance with the control variables.

11. The computerized system of

claim 10

, wherein the movement about the three-dimensional scene takes into account a rendered frame rate of the scene so that rate of movement about the scene is substantially independent of complexity of the scene.

12. The computerized system of

claim 1

, wherein the object comprises a head of a user of the computer.

13. The computerized system of

claim 12

, wherein the control variables take into account roll orientation.

14. The computerized system of

claim 12

, wherein the control variables take into account unintended vertical movement as a result of horizontal movement.

15. The computerized system of

claim 1

, wherein the controller comprises a computer program running on a computer.

16. A computerized method comprising:

generating tracking variables regarding an object from data received from a video camera tracking the object; and

,

transforming the tracking variables to control variables having sensitivity to movement of the object that varies in accordance with movement of the object from a neutral position.

17. The computerized method of

claim 16

, further comprising displaying the three-dimensional scene about which movement is controlled in accordance with the control variables.

18. The computerized method of

claim 17

, wherein the movement about the three-dimensional scene takes into account a rendered frame rate of the three-dimensional scene.

19. The computerized method of

claim 16

, further comprising displaying the three-dimensional scene through which movement is controlled in accordance with the control variables.

20. The computerized method of

claim 19

, wherein the movement through the three-dimensional scene takes into account a rendered frame rate of the three-dimensional scene.

21. The computerized method of

claim 16

, wherein the object comprises a head of a user and transforming the tracking variables to control variables comprises taking into account roll orientation.

22. The computerized method of

claim 16

, wherein the object comprises a head of a user and transforming the tracking variables to control variables comprises taking into account unintended vertical movement as a result of horizontal movement.

23. The computerized method of

claim 16

, wherein the object is movable across different first ranges across a first axis and different second ranges across a second axis perpendicular to the first axis, each range corresponding to a different sensitivity of the control variables.

24. The computerized method of

claim 16

, wherein the tracking variables track movement of the object in six degrees of freedom.

25. A computer comprising:

a processor;

a computer-readable medium;

a controller program executed by the processor from the medium to generate control variables having sensitivity to movement of an object tracked by a video camera that varies in accordance with movement of the object from a neutral position.

26. The computer of

claim 25

, wherein the computer-readable medium is selected from the group essentially consisting of:

a memory, a storage device.

27. The computer of

claim 25

, wherein the object is movable across different first ranges across a first axis and different second ranges across a second axis perpendicular to the first axis, each range corresponding to a different sensitivity of the control variables.

28. A computer-readable medium having a controller program stored thereon to cause a suitably equipped computer to generate control variables having sensitivity to movement of an object tracked by a video camera that varies in accordance with movement of the object from a neutral position.

29. The computer-readable medium of

claim 28

, wherein the object is movable across different first ranges across a first axis and different second ranges across a second axis perpendicular to the first axis, each range corresponding to a different sensitivity of the control variables.