Bounding box gesture recognition on a touch detecting interactive display
First Claim
1. In an interactive display, a method for identifying a specific user gesture, the method comprising:
- displaying imagery on an imaging surface of the interactive display;
detecting a plurality of contact locations at which at least one user contacts a touch sensor to control the interactive display;
responsive to a determination that a deformation of a bounding box enclosing at least two of said plurality of contact locations exceeds a predetermined deformation threshold and responsive to a determination that a motion of said bounding box is less than a predetermined motion threshold, identifying said specific user gesture as a rotate gesture;
determining a direction of rotation of the bounding box based on characteristics of the at least two of said plurality of contact locations;
associating said specific user gesture with a display command; and
executing said display command to alter the imagery.
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Accused Products
Abstract
The invention provides a method and apparatus for identifying gestures performed by a user to control an interactive display. The gestures are identified based on a bounding box enclosing the points at which a user contacts a touch sensor corresponding with the display surface. The invention thus permits the use of inexpensive and highly reliable grid-based touch sensors that provide a bounding box to describe contact information. In identifying the gestures, the position, motion, shape, and deformation of the bounding box may all be considered. In particular, the center, width, height, aspect ratio, length of the diagonal, and orientation of the diagonal of the bounding box may be determined. A stretch factor, defined as the maximum of the ratio of the height of the bounding box to the width of the bounding box and the ratio of the width of the bounding box to the height of the bounding box, may also be computed. Finally, gestures may be identified based on the changes in time of these characteristics and quantities.
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Citations
20 Claims
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1. In an interactive display, a method for identifying a specific user gesture, the method comprising:
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displaying imagery on an imaging surface of the interactive display; detecting a plurality of contact locations at which at least one user contacts a touch sensor to control the interactive display; responsive to a determination that a deformation of a bounding box enclosing at least two of said plurality of contact locations exceeds a predetermined deformation threshold and responsive to a determination that a motion of said bounding box is less than a predetermined motion threshold, identifying said specific user gesture as a rotate gesture; determining a direction of rotation of the bounding box based on characteristics of the at least two of said plurality of contact locations; associating said specific user gesture with a display command; and executing said display command to alter the imagery. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An interactive display comprising:
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means for displaying imagery on an imaging surface of the interactive display; a touch sensor corresponding to said imaging surface; means for detecting a plurality of contact locations at which at least one user contacts said touch sensor to control said interactive display; means for identifying a rotate gesture that determines if a deformation of a bounding box surrounding at least two of said plurality of contact locations is greater than a predetermined deformation threshold and determines if a motion of said bounding box is less than a predetermined motion threshold; means for determining a direction of rotation of the bounding box based on characteristics of the at least two of said plurality of contact locations; means for associating said rotate gesture with a corresponding display command; and means for executing said corresponding display command to alter the imagery. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A non-transitory machine-readable medium having instructions which, when executed by a machine, cause the machine to perform operations comprising:
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displaying imagery on an imaging surface of an interactive display; detecting a plurality of contact locations at which at least one user contacts a touch sensor to control the interactive display; responsive to a determination that a deformation of a bounding box enclosing at least two of said plurality of contact locations exceeds a predetermined deformation threshold and responsive to a determination that a motion of said bounding box is less than a predetermined motion threshold, identifying a specific user gesture as a rotate gesture; determining a direction of rotation of the bounding box based on characteristics of the at least two of said plurality of contact locations; associating said specific user gesture with a display command; and executing said display command to alter the imagery. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification