Appeal No. 2001-2293
Application No. 08/984,602
BACKGROUND
The invention is directed to a user interface system that detects the presence
and position of a source of modulated light. Representative claim 1 is reproduced
below.
1. A method for tracking within frames of digital video data movement of a
light source that emits light modulated different from a frequency of the frames of
digital video data, comprising the steps of:
determining presence of the light as a function of relative luminances of
portions of a frame of digital video data and difference luminances between the
portions of the frame and corresponding portions of a previous frame;
storing coordinates and associated codes for selected portions of the
frame, the codes indicative of relative luminances and difference luminances of
the selected portions, and the selected portions having the greatest relative
luminances and difference luminances; and
determining a position of the light within a frame as a function of the
relative luminances, the difference luminances, and coordinates and associated
codes of the selected portions of the frame relative to coordinates and
associated codes of selected portions of the previous frame.
The examiner relies on the following references:
Iura et al. (Iura) 5,617,312 Apr. 1, 1997
(filed Nov. 18, 1994)
Siio 5,943,042 Aug. 24, 1999
(filed Oct. 5, 1995)
Claims 1-17 stand rejected under 35 U.S.C. § 103 as being unpatentable over
Iura and Siio.
We refer to the Final Rejection (Paper No. 8) and the Examiner’s Answer (Paper
No. 13) for a statement of the examiner’s position and to the Brief (Paper No. 12) and
-2-
Page: Previous 1 2 3 4 5 6 7 8 Next
Last modified: November 3, 2007