System for re-registering a sensor during a live event

• US 5,862,517 A
• Filed: 01/17/1997
• Issued: 01/19/1999
• Est. Priority Date: 01/17/1997
• Status: Expired due to Term

• Current Assignee: Sportsmedia Technology Corporation
• Original Assignee: Fox Sports Productions, Inc. (The Walt Disney Company)
• Inventors: Heidmann, Timothy P., Olsen, Patrick W., Gloudemans, James R., Cavallaro, Richard H., Honey, Stanley K.
• Primary Examiner(s): Arana, Louis
• Assistant Examiner(s): ASSOUAD, PATRICK J
• Application Number:
  US08/786,108
• Time in Patent Office: 732 Days
• Field of Search: 364/559, 364/550, 364/551.01, 364/556, 364/561, 364/570, 364/571.01, 364/571.02, 340/870.01, 340/988, 340/500, 340/600, 340/323 R, 73/488, 73/489, 73/490, 348/143, 348/157, 348/169, 382/276, 382/297, 382/294, 342/52, 342/53, 342/56, 342/118, 342/147, 342/165, 702/85, 702/92, 702/93, 702/94
• US Class Current: 702/85
• CPC Class Codes: G06T 7/70 Determining position or orientation of objects or cameras camera calibration G06T7/80
• CPC Class Codes: G06T 7/80 Analysis of captured images to determine intrinsic or extrinsic camera parameters, i.e. camera calibration
• CPC Class Codes: G06V 10/147 Details of sensors, e.g. sensor lenses fingerprint or palmprint sensors G06V40/13; vascular sensors G06V40/145; eye sensors G06V40/19
• CPC Class Codes: G06V 10/245 by locating a pattern; Special marks for positioning

Abstract

Although sensors are typically registered before the live event, a sensor'"'"'s location, orientation and/or field of view can be altered during the event. A system for re-registering a sensor during a live event allows for the determination that a sensor is not properly registered. If such a determination is made, the system accumulates valid data during the live event. The valid data is compared to the data from the improperly registered sensor in order to determine the amount of error. The variables that define the sensor'"'"'s registration are changed to reduce the error.

Claims

1. A method of re-registering a first sensor during a live event, said first sensor being part of a system for performing a first function, said system further including a second sensor, said method comprising the steps of:

accumulating data during said live event including acquiring data from said first sensor and said second sensor, said first sensor being mis-registered, said second sensor being properly registered and said data acquired from said second sensor being used for performing said first function;

calculating, during said live event, an error based on at least a subset of said accumulated data and one or more registration parameters associated with said first sensor; and

determining, during said live event, a new value for at least one of said registration parameters.

2. A method according to claim 1, wherein:

said first sensor and said second sensor being a same type of sensor; and

said step of calculating is based on data from said first sensor and data from said second sensor.

3. A method according to claim 2, wherein:

said first sensor and said second sensor are infrared sensors.

4. A method according to claim 1, wherein:

said one or more registration parameters include at least two parameters related to location.

5. A method according to claim 1, wherein:

said one or more registration parameters include at least two parameters related to orientation.

6. A method according to claim 1, wherein:

said step of determining is performed by a processor.

7. A method according to claim 1, wherein:

said step of determining a new value for at least one of said registration parameters attempts to reduce said error.

8. A method according to claim 1, wherein:

said step of determining a new value for at least one of said registration parameters includes varying at least two registration parameters to reduce said error.

9. A method according to claim 1, further including the step of:

determining that said first sensor is mis-registered.

10. A method according to claim 1, wherein:

said step of accumulating data includes turning on one or more beacons, sensing data and turning off said one or more beacons.

11. A method according to claim 1, wherein:

said step of accumulating data includes acquiring data regarding one or more beacons.

13. A method according to claim 1, further including the step of:

determining said object'"'"'s location without using said data from said first sensor.

14. A method according to claim 1, wherein:

said step of accumulating continues for a predetermined period of time.

15. A method according to claim 1, wherein:

said step of accumulating continues until a sufficient distribution of data is accumulated.

18. A method according to claim 1, wherein:

said live event is an indoor sporting event.

19. A method according to claim 1, wherein:

said step of calculating an error includes comparing data from said sensor to data from other sensors.

20. A method according to claim 1, wherein:

said step of calculating an error includes using data from said first sensor to determine a first position value for an object, using data from one or more other sensors to determine a second position value for said object and comparing said first position value to said second position value.

21. A method according to claim 1, wherein:

said step of determining a new value for at least one of said registration parameters includes varying said one or more parameters until a registration error is reduced to within a predetermined threshold.

22. A method according to claim 1, wherein:

said steps of accumulating data and calculating an error include using data from first said sensor to determine a first set of location data for an object during a time period, using data from one or more other sensors to determine a second set location data for said object during said time period, each member of said first set of location data corresponding to a member of said second set of location data and determining a deviation for each member of said first set of location data as compared to its corresponding member of said second set of location data.

23. A method according to claim 1, wherein:

said step of determining a new value for at least one of said registration parameters includes;

(A) making a guess for a first registration parameter;

(B) evaluating said error;

(C) modifying said first registration parameter; and

(D) determining whether said error has been reduced.

24. A method according to claim 1, further including the steps of:

determining that said first sensor is mis-registered;

taking said first sensor offline after determining that said first sensor is mis-registered; and

bringing said first sensor online after said step of determining a new value for at least one of said registration parameters;

said step of accumulating data includes acquiring data from said first sensor and at least a second sensor, said first sensor and said second sensor being a same type of sensor;

said step of determining is performed by a processor;

said step of determining a new value for at least one of said registration parameters, includes varying at least two registration parameters to reduce said error.

12. A method of re-registering a first sensor during a live event, comprising the steps of:

accumulating data during said live event, said step of accumulating data includes acquiring data from said first sensor pertaining to an object and acquiring data from other sensors pertaining to said object

calculating, during said live event, an error based on at least a subset of said accumulated data and one or more registration parameters associated with said first sensor; and

determining, during said live event, a new value for at least one of said registration parameters.

16. A method of re-registering a first sensor during a live event, comprising the steps of:

taking said first sensor offline;

accumulating data during said live event;

calculating, during said live event, an error based on at least a subset of said accumulated data and one or more registration parameters associated with said first sensor; and

determining, during said live event, a new value for at least one of said registration parameters; and

bringing said first sensor online after said step of determining a new value for at least one of said registration parameters.

17. A method according to claim 16, further including the step of:

determining that said first sensor is mis-registered prior to said step of taking said first sensor offline.

25. A method of re-registering a first sensor during a live event, said first sensor being part of a system for performing a first function, said system further including a second sensor, said method comprising the steps of:

accumulating data during said live event from said first sensor and said second sensor, said first sensor being mis-registered, said second sensor being properly registered and said data acquired from said second sensor being used for performing said first function; and

determining, during said live event, a new value for at least one registration parameter associated with said first sensor.

27. A method according to claim 25, further including the steps of:

determining that said first sensor is mis-registered;

taking said first sensor offline after determining that said first sensor is mis-registered; and

bringing said first sensor online after said step of determining a new value for at least one registration parameter.

28. A method according to claim 25, wherein:

said step of determining a new value for at least one registration parameter includes comparing data from said sensor to data of other sensors.

29. A method according to claim 25, wherein:

said step of accumulating data includes acquiring data from said first sensor and at least a second sensor, said first sensor and said second sensor being a same type of sensor.

30. A method according to claim 25, further including the step of:

calculating, during said live event, an error based on said accumulated data and said at least one registration parameter.

31. A method according to claim 30, wherein:

said step of determining a new value for at least one registration parameter includes varying at least two registration parameters to reduce said error.

26. A method of re-registering a first sensor during a live event comprising the steps of:

accumulating data during said live event; and

automatically determining, during said live event, a new value for at least one registration parameter associated with said first sensor, said step of automatically determining a new value is commenced without human intervention.

32. One or more computer readable storage mediums having computer readable program code embodied on said computer readable storage mediums, said computer readable program code for re-registering a first sensor during a live event, said computer readable program code comprising:

first program code, said first program code accumulates data during said live event from said first sensor and a second sensor, said first sensor being mis-registered, said second sensor being properly registered; and

second program code, said second program code determines, during said live event, a new value for at least one registration parameter associated with said first sensor based on data acquired from said first sensor.

33. One or more computer readable storage mediums according to claim 32, wherein said program code further includes:

third program code, said third program code determines that said first sensor is mis-registered;

fourth program code, said fourth program code takes said first sensor offline; and

fifth program code, said fifth program code brings said first sensor online after said step of determining a new value for at least one registration parameter.

34. One or more computer readable storage mediums according to claim 32, wherein:

said second program code compares data from said first sensor to data from said second sensor.

35. One or more computer readable storage mediums according to claim 32, wherein:

said first sensor and said second sensor being a same type of sensor.

36. One or more computer readable storage mediums according to claim 32, wherein said program code further includes:

third program code, said third program code calculates, during said live event, an error based on said accumulated data and said at least one registration parameter.

37. One or more computer readable storage mediums according to claim 32, wherein:

said second program code calculates, during said live event, an error based on said accumulated data and varies at least two registration parameters to reduce said error.

38. One or more computer readable storage mediums having computer readable program code embodied on said computer readable storage mediums, said computer readable program code for re-registering a first sensor during a live event, said first sensor being part of a system for performing a first function, said system further including a second sensor, said computer readable program code comprising:

first program code, said first program code accumulates data during said live event including accumulating data from said first sensor and said second sensor, said first sensor being mis-registered, said second sensor being properly registered and said data acquired from said second sensor being used for performing said first function;

second program code, said second program code calculates, during said live event, an error based on at least a subset of said accumulated data and one or more registration parameters associated with said first sensor; and

third program code, said third program code determines, during said live event, a new value for at least one of said registration parameters.

39. One or more computer readable storage mediums according to claim 38, wherein said program code further includes:

fourth program code, said fourth program code determines that said first sensor is mis-registered;

fifth program code, said fifth program code takes said first sensor offline; and

sixth program code, said sixth program code brings said first sensor online.

40. One or more computer readable storage mediums according to claim 39, wherein:

said second program code compares data from said first sensor to data from said second sensor.

41. One or more computer readable storage mediums according to claim 39, wherein:

said first sensor and said second sensor being a same type of sensor.

42. One or more computer readable storage mediums according to claim 38, wherein:

said third program code varies at least two registration parameters to reduce said error.

43. An apparatus for tracking an object during a live event, comprising:

a plurality of sensors, including a first sensor and a second sensor; and

one or more processors in communication with said sensors, said one or more processors programmed to;

accumulate data from at least said first and second sensors during said live event, said first sensor being mis-registered, said second sensor being properly registered and said data accumulated from said second sensor being used to track said object during said live event

calculate, during said live event, an error based on at least a subset of said accumulated data and one or more registration parameters associated with a first sensor; and

determine, during said live event, a new value for at least one of said registration parameters.

44. An apparatus according to claim 43, wherein:

said one or more processors vary at least two registration parameters to reduce said error.

45. An apparatus according to claim 43, wherein:

said one or more processors further programmed to determine a location of said object during said live event without using said first sensor if said first sensor is mis-registered.

46. An apparatus according to claim 43, further including:

a camera, said one or more processors programmed to determine a position of an image of said object in a video frame captured by said camera.

47. An apparatus according to claim 43, further including:

means for determining that said first sensor is mis-registered.