Self-referenced tracking
DCFirst Claim
Patent Images
1. A method comprisingmounting a sourceless orientation tracker on a user'"'"'s head, and using a position tracker to track a position of a first localized feature associated with a limb of the user relative to the user'"'"'s head.
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Abstract
A new tracking technique is essentially “sourceless” in that it can be used anywhere with no set-up, yet it enables a much wider range of virtual environment-style navigation and interaction techniques than does a simple head-orientation tracker. A sourceless head orientation tracker is combined with a head-worn tracking device that tracks a hand-mounted 3D beacon relative to the head. The system encourages use of intuitive interaction techniques which exploit proprioception.
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Citations
59 Claims
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1. A method comprising
mounting a sourceless orientation tracker on a user'"'"'s head, and using a position tracker to track a position of a first localized feature associated with a limb of the user relative to the user'"'"'s head.
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52. A method comprising:
using acoustic or radio frequency signals to track a position of a first localized feature associated with a limb of the user relative to the user'"'"'s head.
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53. A tracking system comprising:
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an acoustic or radio frequency position tracker adapted for mounting on a user'"'"'s head, said tracker being adapted to track a position of a first localized feature associated with a limb of the user relative to the user'"'"'s head.
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54. A tracking system comprising
a sourceless orientation tracker for mounting on a user'"'"'s head, and a position tracker adapted to track a position of a first localized feature associated with a limb of the user relative to the user'"'"'s head.
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55. A method comprising:
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mounting a motion tracker on a user'"'"'s head;
using a position tracker to track a position of a first localized feature associated with a limb of the user relative to the user'"'"'s head;
positioning the first localized feature at a first point;
positioning the first localized feature at a second point; and
calculating the distance between the first point and the second point.
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56. A system comprising:
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mounting a first inertial sensor on a user'"'"'s head;
mounting a second inertial sensor elsewhere on the user'"'"'s body or in an object held by the user; and
tracking the position of one inertial sensor relative to the other. - View Dependent Claims (57, 58, 59)
sensing data at the first and second inertial sensors and using the sensed data to track the position of one inertial sensor relative to the other.
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58. The method of claim 57, wherein tracking the position of the inertial sensor is done without reference to any signal received from a source not mounted on or held by the user.
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59. The method of claim 58, wherein the drift of the relative position or orientation of the second inertial sensor relative to the first inertial sensor is corrected by measurements between devices on the user'"'"'s head and devices elsewhere on the users body.
Specification