MULTI-TOUCH INPUT DISCRIMINATION
First Claim
Patent Images
1. A method to discriminate input sources to a touch-surface device, comprising:
- obtaining a proximity image;
segmenting the proximity image to identify a plurality of patches;
determining a minor axis radius value for each of the plurality of patches;
identifying one of the plurality of patches as being associated with a large object if the minor axis radius value of the patch is above a first specified threshold; and
using the identified patch to control an operation of a touch-surface device.
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Abstract
Techniques for identifying and discriminating between different input patterns to a multi-touch touch-screen device are described. By way of example, large objects hovering a short distance from the touch-surface (e.g., a cheek, thigh or chest) may be identified and distinguished from physical contacts to the surface. In addition, rough contacts due to, for example, ears and earlobes, may be similarly identified and distinguished from contacts due to fingers, thumbs, palms and finger clasps.
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Citations
72 Claims
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1. A method to discriminate input sources to a touch-surface device, comprising:
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obtaining a proximity image; segmenting the proximity image to identify a plurality of patches; determining a minor axis radius value for each of the plurality of patches; identifying one of the plurality of patches as being associated with a large object if the minor axis radius value of the patch is above a first specified threshold; and using the identified patch to control an operation of a touch-surface device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A method to identify an input source to a multi-touch touch-surface device, comprising:
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obtaining a proximity image; segmenting the proximity image to identify a patch; determining a minor axis radius value for the patch; identifying the patch as being associated with a large object if the minor axis radius value of the patch is above a first specified threshold; and using the identified patch to control an operation of a multi-touch touch-surface device. - View Dependent Claims (33, 34, 35, 36, 37, 50, 51)
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38. A method to identify an input source to a multi-touch touch-surface device, comprising:
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obtaining a proximity image; segmenting the proximity image to identify a patch; determining a minor axis radius value for the patch; identifying the patch as being associated with a palm if the minor axis value of the patch is less than a first specified threshold and greater than a second specified threshold; and using the identified patch to control an operation of a multi-touch touch-surface device. - View Dependent Claims (39, 40, 41, 42, 43, 52, 53)
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44. A method to identify an input source to a multi-touch touch-surface device, comprising:
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obtaining a proximity image; segmenting the proximity image to identify a patch; determining a minor axis radius value for the patch; identifying a patch as being associated with a finger if the minor axis value of the patch is less than a second specified threshold; and using the identified patch to control an operation of a multi-touch touch-surface device. - View Dependent Claims (45, 46, 47, 48, 49, 54, 55)
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56. A method to identify an input source to a multi-touch touch-surface device, comprising:
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obtaining a proximity image; segmenting the proximity image to identify a plurality of patches; determining that at least five of the identified patches are associated with finger contacts to a touch-surface; identifying the at least five identified patches as being associated with a finger-clasp operation; and using the identified finger-clasp operation to control an operation of a multi-touch touch-surface device. - View Dependent Claims (57, 58)
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59. A method to identify an input source to a multi-touch touch-surface device, comprising:
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obtaining a proximity image; segmenting the proximity image to identify a plurality of patches; determining that at least two of the identified patches have major axis radius values larger than approximately 15 millimeters; identifying the at least two identified patches as being associated with a finger-clasp operation; and using the identified finger-clasp operation to control an operation of a multi-touch touch-surface device. - View Dependent Claims (60, 61)
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62. A method to identify an input source to a touch-surface device, comprising:
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obtaining a proximity image; segmenting the proximity image to identify one or more patches, each patch having a plurality of pixels, each pixel having a value; determining a signal density value for at least one of the one or more patches; identifying the at least one patch as being associated with an object contacting a touch-surface of a touch-surface device if the at least one patch has a signal density value greater than a specified value; identifying the at least one patch as being associated with an object hovering above the touch-surface if the at least one patch has a signal density value less than the specified value; and performing a control operation on the touch-surface device in response to the acts of identifying. - View Dependent Claims (63, 64, 65, 66, 67, 68, 69, 70, 71, 72)
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Specification