08139110 is referenced by 6 patents and cites 103 patents.

One embodiment of the invention includes a gesture recognition interface system that determines input gestures based on changes in relative locations of an input object to initiate device inputs associated with the input gestures. The system comprises at least one light source positioned to illuminate a background surface in a first light spectrum to generate a light contrast difference between the input object and the background surface. The system also comprises a display device configured to display at least one calibration pattern on the background surface in a second light spectrum in response to a calibration command and at least one camera configured to receive images of the background surface in both the first light spectrum and the second light spectrum. The system further comprises an automated calibration component configured to issue the calibration command and to associate features of the at least one calibration pattern in the received images with known physical locations.

Title
Calibration of a gesture recognition interface system
Application Number
11/933814
Publication Number
8139110 (B2)
Application Date
November 1, 2007
Publication Date
March 20, 2012
Inventor
H Keith Nishihara
Los Altos
CA, US
Agent
Tarolli Sundheim Covell & Tummino
Assignee
Northrop Grumman Systems Corporation
CA, US
IPC
G06K 9/00
G06F 3/042
G09G 5/00
H04N 7/18
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