Method and apparatus for improving accuracy of touch screen event analysis by use of edge classification
First Claim
1. An apparatus for analyzing touch screen users based on characterization of features derived from a touch event the apparatus comprising:
- a touch sensitive screen for detecting a touch event from at least one user, said touch sensitive screen having two touch regions;
at least one sensor generating a vibro-acoustic waveform signal from the touch event;
a converter for converting the waveform signal into a domain signal;
a feature extractor for extracting distinguishing features from said domain signal; and
a plurality of classification units which use the distinguishing features of said extractor to analyze the features of the domain signal, a first classification unit configured to classify touch events occurring within a first touch region and a second classification unit configured to classify touch events occurring within a second touch region and not configured to classify touch events occurring within the first touch region, wherein the first touch region is distinct from the second touch region, wherein the first touch region is everywhere proximate to an edge of said touch sensitive screen, wherein the second touch region is all remaining area of said touch sensitive screen not including the first touch region, and wherein if any portion of the touch event is in the first touch region, the first classification unit is configured to classify that event.
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Abstract
Methods and apparatus of embodiments of the present invention include a classification system configured to treat edge contact of a touch screen as a separate class of touch events such that any touches occurring near the edge of the touch screen are to be processed by a classifier that is configured to process edge contacts as compared to a classifier that is configured to process other contacts that may occur in the approximate middle of the touch screen which may be wholly digitized. An apparatus may employ two separate and distinct classifiers, including a full touch classifier and an edge touch classifier. The touch screen may be configured to have two different sensing regions to determine which of the two classifiers is appropriate for a touch event.
45 Citations
15 Claims
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1. An apparatus for analyzing touch screen users based on characterization of features derived from a touch event the apparatus comprising:
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a touch sensitive screen for detecting a touch event from at least one user, said touch sensitive screen having two touch regions; at least one sensor generating a vibro-acoustic waveform signal from the touch event; a converter for converting the waveform signal into a domain signal; a feature extractor for extracting distinguishing features from said domain signal; and a plurality of classification units which use the distinguishing features of said extractor to analyze the features of the domain signal, a first classification unit configured to classify touch events occurring within a first touch region and a second classification unit configured to classify touch events occurring within a second touch region and not configured to classify touch events occurring within the first touch region, wherein the first touch region is distinct from the second touch region, wherein the first touch region is everywhere proximate to an edge of said touch sensitive screen, wherein the second touch region is all remaining area of said touch sensitive screen not including the first touch region, and wherein if any portion of the touch event is in the first touch region, the first classification unit is configured to classify that event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of analyzing touch screen users based on characterization of features derived from a touch event, the method comprising:
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detecting a touch event on a touch sensitive screen, said touch sensitive screen having two touch regions; generating a vibro-acoustic waveform signal using at least one sensor detecting such touch event; converting the waveform signal into a domain signal; extracting distinguishing features from said domain signal; and classifying said features to analyze the features of the domain signal by employing one of two different classification processes depending on which of the two distinct touch regions was touched during the touch event, wherein a first classification process is employed based on the touch event being associated with a first touch region, and wherein a second classification process is employed based on the touch event being associated with a second touch region and not with the first touch region, wherein the first touch region is everywhere proximate to an edge of said touch sensitive screen, wherein the second touch region is all remaining area of said touch sensitive screen not including the first touch region, and wherein if any portion of the touch event is in the first touch region, the first classification process is configured to classify that event. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A non-transitory computer readable medium containing instructions for using detected touch screen events to analyze touch screen users where there are two touch screen regions, wherein execution of the instructions by a processor causes the processor to carry out the steps of:
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generating a vibro-acoustic waveform signal using at least one sensor detecting a touch event; converting the waveform signal into a domain signal; extracting distinguishing features from said domain signal; and classifying said features to analyze the features of the domain signal by employing one of two different classification processes depending on which of the two distinct touch regions was touched during the touch event, wherein a first classification process is employed based on the touch event being associated with a first touch region, and wherein a second classification process is employed based on the touch event being associated with a second touch region and not with the first touch region, wherein the first touch region is distinct from the second touch region, wherein the first touch region is everywhere proximate to an edge of said touch sensitive screen, wherein the second touch region is all remaining area of said touch sensitive screen not including the first touch region, and wherein if any portion of the touch event is in the first touch region, the first classification process is configured to classify that event.
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Specification