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.
175 Citations
30 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, 24, 25, 26, 27, 28, 29, 30)
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Specification