08130203 is referenced by 109 patents and cites 239 patents.

Techniques for identifying and discriminating between different types of contacts to a multi-touch touch-screen device are described. Illustrative contact types include fingertips, thumbs, palms and cheeks. By way of example, thumb contacts may be distinguished from fingertip contacts using a patch eccentricity parameter. In addition, by non-linearly deemphasizing pixels in a touch-surface image, a reliable means of distinguishing between large objects (e.g., palms) from smaller objects (e.g., fingertips, thumbs and a stylus) is described.

Title
Multi-touch input discrimination
Application Number
11/756211
Publication Number
8130203 (B2)
Application Date
May 31, 2007
Publication Date
March 6, 2012
Inventor
Wayne Carl Westerman
San Francisco
CA, US
Agent
Morrison & Foerster
Assignee
Apple
CA, US
IPC
G06F 3/041
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