FAR-FIELD INPUT IDENTIFICATION
First Claim
Patent Images
1. A method to identify an object that is hovering above but not in contact with a multi-touch touch-surface, comprising:
- obtaining a proximity image having a plurality of pixels;
generating a far-field image from the proximity image, the far-field image having a plurality of pixels;
identifying background pixels in the proximity image;
generating a far-field measure value by combining pixel values in the far-field image that correspond to background pixels in the proximity image;
determining an object is hovering above a multi-touch touch-surface if the far-field measure value is above a specified threshold; and
controlling an operation of a device if an object is determined to be hovering above the multi-touch touch-surface.
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Abstract
Techniques for identifying an object in close proximity to, but not in contact with, a multi-touch touch-screen device are described. By way of example, a cheek or ear hovering a short distance from the touch-surface (e.g., approximately 1 to 3 centimeters) may be identified and distinguished from physical contacts to the surface.
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Citations
23 Claims
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1. A method to identify an object that is hovering above but not in contact with a multi-touch touch-surface, comprising:
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obtaining a proximity image having a plurality of pixels; generating a far-field image from the proximity image, the far-field image having a plurality of pixels; identifying background pixels in the proximity image; generating a far-field measure value by combining pixel values in the far-field image that correspond to background pixels in the proximity image; determining an object is hovering above a multi-touch touch-surface if the far-field measure value is above a specified threshold; and controlling an operation of a device if an object is determined to be hovering above the multi-touch touch-surface. - 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)
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Specification