Touch rejection
First Claim
Patent Images
1. A method for determining an orientation of a hand proximate to a touch sensing surface, the method comprising:
- identifying a plurality of touches from a touch image of the hand proximate to the touch sensing surface, wherein each of the plurality of touches has a first centroid;
weighting the plurality of touches;
determining a second centroid of the plurality of weighted touches;
fitting an ellipse around the second centroid to the plurality of weighted touches; and
determining an orientation of the hand based on parameters of the ellipse.
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Accused Products
Abstract
The rejection of undesired touch events on a touch surface is disclosed. A weighted meta-centroid of all touch events can be computed. In some examples, touches can be weighted inversely to their size and distance to the nearest neighboring touch. In some examples, touches can be weighted based on the size of their minor radii. A meta-ellipse can be fit to the weighted touch events. In some examples, the major axis of the meta-ellipse can be used to determine the orientation of a user'"'"'s hand to reject undesired touches. In other examples, touches within the meta-ellipse can be rejected.
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Citations
21 Claims
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1. A method for determining an orientation of a hand proximate to a touch sensing surface, the method comprising:
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identifying a plurality of touches from a touch image of the hand proximate to the touch sensing surface, wherein each of the plurality of touches has a first centroid; weighting the plurality of touches; determining a second centroid of the plurality of weighted touches; fitting an ellipse around the second centroid to the plurality of weighted touches; and determining an orientation of the hand based on parameters of the ellipse. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A non-transitory computer readable medium, the computer readable medium containing instructions that, when executed, perform a method for determining an orientation of a hand proximate to a touch sensing surface, the method comprising:
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identifying a plurality of touches from a touch image of the hand proximate to the touch sensing surface, wherein each of the plurality of touches has a first centroid; weighting the plurality of touches; determining a second centroid of the plurality of weighted touches; fitting an ellipse around the second centroid to the plurality of weighted touches; and determining an orientation of the hand based on parameters of the ellipse. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An electronic device, comprising:
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a touch sensing surface; and a processor coupled to the touch sensing surface and capable of; identifying a plurality of touches from a touch image of a hand proximate to the touch sensing surface, wherein each of the plurality of touches has a first centroid; weighting the plurality of touches; determining a second centroid of the plurality of weighted touches; fitting an ellipse around the second centroid to the plurality of weighted touches; and determining an orientation of the hand based on parameters of the ellipse. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification