Size/scale and orientation determination of a pointer in a...

Computer graphics processing and selective visual display system – Display peripheral interface input device – Cursor mark position control device

Reexamination Certificate

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Details

C345S157000

Reexamination Certificate

active

06954197

ABSTRACT:
A touch system includes a touch surface and at least two cameras associated with the touch surface. The at least two cameras acquire images of the touch surface from different locations and having overlapping fields of view. A digital signal processor is associated with each camera. The digital signal processors process pixel data acquired by selected pixel subsets of the at least two digital cameras to generate pointer characteristic data when a pointer exists in the acquired images. The pointer characteristic data identifies edges of the pointer. A master digital signal processor triangulates the edge information in the pointer characteristic data to determine a bounding area that represents a pointer perimeter.

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