Degree of freedom extraction from multiple contacts

  • US 8,665,240 B2
  • Filed: 05/15/2013
  • Issued: 03/04/2014
  • Est. Priority Date: 01/26/1998
  • Status: Expired due to Term
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First Claim
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1. A method for providing input to a computing device having an associated touch sensitive surface, the method comprising:

  • obtaining tracking information of a plurality of contacts, each contact corresponding to a touch object being tracked on or near the touch sensitive surface, the tracking information including motion information of individual contacts within the plurality of contacts;

    determining a translation motion of the plurality of contacts, the translation motion being based on the motion information of each contact in a first set of one or more contacts of the plurality of contacts;

    generating a translation input of the computing device based on the translation motion of the plurality of contacts; and

    generating a scaling input of the computing device based on the motion information of each contact of a second set of one or more contacts of the plurality of contacts, wherein at least a portion of the generating of the translation input is concurrent with at least a portion of the generating of the scaling input.

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