07421093 is referenced by 351 patents and cites 53 patents.

A multiple camera tracking system for interfacing with an application program running on a computer is provided. The tracking system includes two or more video cameras arranged to provide different viewpoints of a region of interest, and are operable to produce a series of video images. A processor is operable to receive the series of video images and detect objects appearing in the region of interest. The processor executes a process to generate a background data set from the video images, generate an image data set for each received video image, compare each image data set to the background data set to produce a difference map for each image data set, detect a relative position of an object of interest within each difference map, and produce an absolute position of the object of interest from the relative positions of the object of interest and map the absolute position to a position indicator associated with the application program.

Title
Multiple camera control system
Application Number
11/304000
Publication Number
7421093 (B2)
Application Date
December 19, 2005
Publication Date
September 2, 2008
Inventor
Francis MacDougall
Ontario
CA
Evan Hildreth
Ontario
CA
Agent
Fish & Richardson P C
Assignee
GestureTek
NY, US
IPC
G06K 9/36
G06K 9/00
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