Motion capture using primary and secondary markers
First Claim
Patent Images
1. A method, comprising:
- coupling a plurality of primary markers to a target;
coupling at least one secondary marker to said target;
capturing a plurality of primary marker data points including;
illuminating said plurality of primary markers; and
capturing a response of said plurality of primary markers to said illumination;
wherein said plurality of primary markers includes a plurality of reflective markers, and said response includes a reflection of said illumination by said plurality of reflective markers;
wherein each data point of the plurality of primary marker data points corresponds to one primary marker of said plurality of primary markers;
wherein;
said illumination is subject to periodic gating to generate on-states and off-states of said illumination; and
said reflection of said illumination is captured during an on-state of said illumination;
capturing at least one secondary marker signature, each marker signature corresponding to and uniquely identifying each secondary marker of said at least one secondary marker,wherein said capturing at least one secondary marker signature includes capturing a unique attribute of said at least one secondary marker during an off-state of said illumination; and
identifying said plurality of primary markers using said at least one secondary marker signature by using a processor.
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Abstract
Capturing the motion of a target. One method includes: coupling a plurality of primary markers to the target; coupling at least one secondary marker to the target; capturing a plurality of primary marker data points, wherein each primary marker data point corresponds to one primary marker of the plurality of primary markers; capturing at least one secondary marker signature, each secondary marker signature corresponding to and uniquely identifying each secondary marker of said at least one secondary marker; and identifying the plurality of primary markers using said at least one secondary marker signature.
47 Citations
21 Claims
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1. A method, comprising:
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coupling a plurality of primary markers to a target; coupling at least one secondary marker to said target; capturing a plurality of primary marker data points including;
illuminating said plurality of primary markers; and
capturing a response of said plurality of primary markers to said illumination;wherein said plurality of primary markers includes a plurality of reflective markers, and said response includes a reflection of said illumination by said plurality of reflective markers; wherein each data point of the plurality of primary marker data points corresponds to one primary marker of said plurality of primary markers; wherein;
said illumination is subject to periodic gating to generate on-states and off-states of said illumination; and
said reflection of said illumination is captured during an on-state of said illumination;capturing at least one secondary marker signature, each marker signature corresponding to and uniquely identifying each secondary marker of said at least one secondary marker, wherein said capturing at least one secondary marker signature includes capturing a unique attribute of said at least one secondary marker during an off-state of said illumination; and identifying said plurality of primary markers using said at least one secondary marker signature by using a processor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system, comprising:
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a plurality of primary markers coupled to a target; at least one secondary marker coupled to said target; wherein each marker of said at least one secondary marker is uniquely identifiable by a secondary marker signature; an image capture module configured to capture a plurality of primary marker data points, each primary marker data point corresponding to one primary marker of said plurality of primary markers, said image capture module also configured to capture at least one secondary marker signature, each secondary marker signature corresponding to and uniquely identifying each secondary marker of said at least one secondary marker; wherein said image capture module captures said plurality of primary marker data points by;
illuminating said plurality of primary markers; and
capturing a response of said plurality of primary markers to said illumination;wherein said plurality of primary markers includes a plurality of reflective markers, and said response includes a reflection of said illumination by said plurality of reflective markers; wherein;
said illumination is subject to periodic gating to generate on-states and off-states of said illumination; and
said reflection of said illumination is captured during an on-state of said illumination;wherein said image capture module captures said at least one secondary marker signature by capturing a unique attribute of said at least one secondary marker during an off-state of said illumination; and a primary marker tracking module configured to identify said plurality of primary markers using said at least one secondary marker signature. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A computer program, stored in a computer-readable storage medium, for capturing the motion of a plurality of primary markers and at least one secondary markers coupled to a target, the program comprising executable instructions that cause a computer to:
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capture a plurality of primary marker data points by;
illuminating said plurality of primary markers; and
capturing response of said plurality of primary markers to said illumination;wherein said plurality of primary markers includes a plurality of reflective markers, and said response includes a reflection of said illumination by said plurality of reflective markers; wherein each primary marker data point of said plurality of primary marker data points corresponds to one primary marker of said plurality of primary markers; wherein;
said illumination is subject to periodic gating to generate on-states and off-states of said illumination; and
said reflection of said illumination is captured during an on-state of said illumination;capture at least one secondary marker signature, each secondary marker signature corresponding to and uniquely identifying each secondary marker of said at least one secondary marker, wherein said at least one secondary marker signature is captured by capturing a unique attribute of said at least one secondary marker during an off-state of said illumination; and identify said plurality of primary markers using said at least one secondary marker signature.
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21. An apparatus for capturing the motion of a plurality of primary markers and at least one secondary markers coupled to a target, the apparatus comprising:
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means for capturing a plurality of primary marker data points by;
illuminating said plurality of primary markers; and
capturing a response of said plurality of primary markers to said illumination;wherein said plurality of primary markers includes a plurality of reflective markers, and said response includes a reflection of said illumination by said plurality of reflective markers; wherein each primary marker data point of said plurality of primary marker data points corresponds to one primary marker of said plurality of primary markers; wherein;
said illumination is subject to periodic gating to generate on-states and off-states of said illumination; and
said reflection of said illumination is captured during an on-state of said illumination;means for capturing at least one secondary marker signature, each secondary marker signature corresponding to and uniquely identifying each secondary marker of said at least one secondary marker, wherein said at least one secondary marker signature is captured by capturing a unique attribute of said at least one secondary marker during an off-state of said illumination; and means for identifying said plurality of primary markers using said at least one secondary marker signature.
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Specification