IRREGULAR INPUT IDENTIFICATION
First Claim
Patent Images
1. A method to process a proximity image, comprising:
- receiving a proximity image;
generating a dispersion image, wherein the dispersion image is based on a high-pass filtered version of the proximity image;
determining an irregularity measure value for the dispersion image, the irregularity measure value indicating a degree of irregularity in the shape of the dispersion image; and
controlling an operation of a touch-surface device when the irregularity measure value is above a specified threshold.
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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.
3 Citations
20 Claims
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1. A method to process a proximity image, comprising:
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receiving a proximity image; generating a dispersion image, wherein the dispersion image is based on a high-pass filtered version of the proximity image; determining an irregularity measure value for the dispersion image, the irregularity measure value indicating a degree of irregularity in the shape of the dispersion image; and controlling an operation of a touch-surface device when the irregularity measure value is above a specified threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 17)
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15. 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, the irregularity measure value indicating a degree of irregularity in the shape of each of the plurality of patches; 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; controlling an operation of the touch-surface device based on the identification of the irregular object; wherein the dispersion image comprises a high pass filtered version of the proximity image; and wherein the act of determining an irregularity measure value for each of the plurality of patches comprises at least determining a total energy value for each of the plurality of patches. - View Dependent Claims (16)
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18. A method to process a proximity image to discriminate between ear and earlobe contacts as distinguished from other contacts in a mutual capacitance touch surface mobile telephone device, comprising:
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obtaining a proximity image based on a disturbance in an electric field of a two dimensional array of sensing elements of the mutual capacitance touch surface mobile telephone device; generating a dispersion image based on a high-pass filtered version of 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 identified patches and the dispersion image, wherein the irregularity measure value indicates a degree of irregularity in the shape of the dispersion image associated with the ear or earlobe positioned near or in contact with the mutual capacitance touch surface mobile telephone device; identifying one of the plurality of patches as being associated with the ear or earlobe contact or near contact if the irregularity measure value of the one patch is above a specified threshold; and controlling the operation of the mutual capacitance touch surface mobile telephone device based on the identification of the ear or earlobe contact.
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19. A method to process a proximity image, comprising:
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segmenting the proximity image to identify a plurality of patches; generating a dispersion image, the dispersion image based on a high-pass filtered version of the plurality of patches of the proximity image; determining an irregularity measure value for each of the plurality of patches of the dispersion image, the irregularity measure value indicating a degree of irregularity in the shape of each of the plurality of patches of the dispersion image; identifying at least 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 touch-surface device if the irregularity measure value is above a specified threshold. - View Dependent Claims (20)
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Specification