Irregular input identification
First Claim
Patent Images
1. A method to process a proximity image, comprising:
- obtaining a dispersion image, the dispersion image having a plurality of pixels;
determining an irregularity measure value for the dispersion image; and
controlling an operation of a touch-surface device when the irregularity measure value is above a specified threshold; and
wherein the act of determining comprises;
determining a total energy value for the dispersion image;
determining a spatial energy value for the dispersion image;
determining a peak energy value for the dispersion image;
and determining the irregularity measure value for the dispersion image by dividing the difference between the spatial energy value and the peak energy value by the total energy value.
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Abstract
Techniques for identifying irregular objects in contact with, or in close proximity to, a touch-surface are described. An irregularity measure is determined based on the regions intrinsic characteristics (e.g., energy content) rather than on the shape (or pattern) of the pixels within the region.
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Citations
42 Claims
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1. A method to process a proximity image, comprising:
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obtaining a dispersion image, the dispersion image having a plurality of pixels; determining an irregularity measure value for the dispersion image; and
controlling an operation of a touch-surface device when the irregularity measure value is above a specified threshold; andwherein the act of determining comprises; determining a total energy value for the dispersion image; determining a spatial energy value for the dispersion image; determining a peak energy value for the dispersion image; and determining the irregularity measure value for the dispersion image by dividing the difference between the spatial energy value and the peak energy value by the total energy value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 38)
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16. A method to identify an irregular input source to a touch-surface device, comprising:
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obtaining a proximity image; generating a dispersion image from the proximity image; segmenting the proximity image to identify a plurality of patches; determining an irregularity measure value for each of the plurality of patches based on the dispersion image; identifying one of the plurality of patches as being associated with an irregular object when the irregularity measure value of the one patch is above a specified threshold; and controlling an operation of the touch-surface device based on the identification of the irregular object. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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39. A method to identify an irregular input source to a multi-touch touch-surface device, comprising:
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obtaining a proximity image; generating a dispersion image from the proximity image; segmenting the proximity image to identify a plurality of patches; determining an irregularity measure value for each of the plurality of patches based on the dispersion image; identifying one of the plurality of patches as being associated with an irregular object when the irregularity measure value of the one patch is above a specified threshold; and controlling an operation of a multi-touch touch-surface device based on the identification of the irregular object.
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40. A device having a touch screen, the device operative to process a proximity image, comprising:
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means for obtaining a dispersion image, the dispersion image having a plurality of pixels; means for determining an irregularity measure value for the dispersion image; and means for controlling an operation of a touch-surface device when the irregularity measure value is above a specified threshold; wherein the determining means comprises; means for determining a total energy value for the dispersion image; means for determining a spatial energy value for the dispersion image; means for determining a peak energy value for the dispersion image; and means for determining the irregularity measure value for the dispersion image by dividing the difference between the spatial energy value and the peak energy value by the total energy value. - View Dependent Claims (41)
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42. A multi-touch touch-surface device operative to identify an irregular input source comprising:
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means for obtaining a proximity image; means for generating a dispersion image from the proximity image; means for segmenting the proximity image to identify a plurality of patches; means for determining an irregularity measure value for each of the plurality of patches based on the dispersion image; means for identifying one of the plurality of patches as being associated with an irregular object when the irregularity measure value of the one patch is above a specified threshold; and means for controlling an operation of a multi-touch touch-surface device based on the identification of the irregular object.
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Specification