Multi-touch contact motion extraction

  • US 8,466,880 B2
  • Filed: 12/22/2008
  • Issued: 06/18/2013
  • 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 generating control signals based on contacts of a touch sensing surface, each contact having multiple degrees of freedom of an associated touch object on or near the touch sensing surface, the method comprising:

  • obtaining tracking information of a plurality of contacts, the contacts corresponding to touch objects on or near the touch sensing surface;

    computing, based on the tracking information, motion information of the plurality of contacts, the motion information including a first component of motion that is one of translation motion, rotational motion, and scaling motion, and a second component of motion that is a different one of translation motion, rotational motion, and scaling motion than the first component of motion;

    modifying the motion information to obtain modified motion information, wherein the modifying includes downscaling the second component of motion relative to the first component of motion; and

    transmitting the modified motion information as a control signal of an electronic or electro-mechanical device.

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