Head tracker system
First Claim
1. A head tracker system for determining a user'"'"'s head orientation relative to a datum comprising:
- a head mounting for attachment to the user'"'"'s head;
an optical sensor located in fixed relation with a known fixed point relative to the head mounting;
a plurality of distinguishable markings each of which is located in fixed relation with a respective known point which is fixed relative to the datum;
an optical correlator for optically correlating the optical image from the optical sensor with an optical image representative of at least one of said markings; and
means for determining the orientation of the head mounting responsive to an output from the optical correlator detecting that there is correlation between the images.
2 Assignments
0 Petitions
Accused Products
Abstract
A head tracker system for determining a user'"'"'s head orientation relative to a datum (22) comprises: a head mounting (2) for attachment to the user'"'"'s head; an optical sensor (12) which in use is located in fixed relation with a known fixed point relative to the head mounting (2) and a plurality of distinguishable markings (18a–18j) each of which when in use is located in fixed relation with a respective known point which is fixed relative to the datum (22). The head tracker further comprises an optical correlator (26) for optically correlating the optical image from the optical sensor (12) with an optical image representative of at least one of said markings (18a–18j); and means (28) for determining the orientation of the head mounting using the output from the optical correlator when it detects that there is correlation between the images.
60 Citations
17 Claims
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1. A head tracker system for determining a user'"'"'s head orientation relative to a datum comprising:
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a head mounting for attachment to the user'"'"'s head; an optical sensor located in fixed relation with a known fixed point relative to the head mounting; a plurality of distinguishable markings each of which is located in fixed relation with a respective known point which is fixed relative to the datum; an optical correlator for optically correlating the optical image from the optical sensor with an optical image representative of at least one of said markings; and means for determining the orientation of the head mounting responsive to an output from the optical correlator detecting that there is correlation between the images. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A head tracker system for determining a user'"'"'s head orientation relative to a datum comprising:
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a head mounting for attachment to the user'"'"'s head; a plurality of distinguishable markings each of which is located in fixed relation with a respective known point which is fixed relative to the head mounting; an optical sensor located in fixed relation with a known fixed point relative to the datum; an optical correlator for optically correlating the optical image from the optical sensor with an optical image representative of at least one of said markings; and means for determining the orientation of the head mounting responsive to an output from the optical correlator detecting that there is correlation between the images.
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15. A head tracker system for determining a user'"'"'s head orientation relative to a datum comprising:
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a head mounting for attachment to the user'"'"'s head; an optical sensor located at a known point fixed relative to the head mounting and operable to collect optical scene data representative of the user'"'"'s environment; an optical correlator for correlating said optical scene data with optical scene data previously captured by said optical sensor to determine the relative movement of the head mounting between the capture of said optical scene data; and means for determining the orientation of the head mounting from said relative movements. - View Dependent Claims (16, 17)
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Specification