09696808 is referenced by 3 patents and cites 126 patents.

One embodiment of the invention includes a method of providing device inputs. The method includes illuminating hand gestures performed via a bare hand of a user in a foreground of a background surface with at least one infrared (IR) light source. The method also includes generating a first plurality of silhouette images associated with the bare hand based on an IR light contrast between the bare hand and the background surface and generating a second plurality of silhouette images associated with the bare hand based on an IR light contrast between the bare hand and the background surface. The method also includes determining a plurality of three-dimensional features of the bare hand relative to the background surface based on a parallax separation of the bare hand in the first plurality of silhouette images relative to the second plurality of silhouette images. The method also includes determining a provided input gesture based on the plurality of three-dimensional features of the bare hand and comparing the provided input gesture with a plurality of predefined gesture inputs in a gesture library. The method further includes providing at least one device input corresponding to interaction with displayed visual content based on the provided input gesture corresponding to one of the plurality of predefined gesture inputs.

Title
Hand-gesture recognition method
Application Number
12/337225
Publication Number
9696808 (B2)
Application Date
December 17, 2008
Publication Date
July 4, 2017
Inventor
Lars Jangaard
Glendale
CA, US
Adrian Kaehler
Bolder Creek
CA, US
Shi Ping Hsu
Pasadena
CA, US
H Keith Nishihara
Los Altos
CA, US
Agent
Tarolli Sundheim Covell & Tummino
Assignee
Northrop Grumman Systems Corporation
CA, US
IPC
G06K 9/00
G06F 3/0485
G06F 3/0484
G06F 3/042
G06F 3/03
G06F 3/01
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