System and method for contactless detection and recognition of gestures in a three-dimensional space
First Claim
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1. A method for the contactless detection and recognition of gestures in a three-dimensional movement space, wherein the gesture comprises an unintentional movement, the method comprising the steps of:
- generating an electrical near-field, which defines the three-dimensional movement space;
moving an object in the three-dimensional movement space in a contactless fashion, wherein a movement of the object comprises an unintentional movement,detecting deformations of the electrical near-field caused by the movements of the object in the three-dimensional movement space by a plurality of sensors providing a plurality of sensor signals,generating from the detected deformations of the electrical near-field at least one movement path corresponding to the movement of the object in the three-dimensional movement space,during the generation of the movement path in the movement path determining a gesture start, wherein beginning with the gesture start the gesture is extracted from the movement path, wherein a gesture start is detected when one or more measured variables exceed one or more respective predefined thresholds,after detecting the gesture start, feeding the movement path starting at the gesture start and ending at a gesture end to a pattern recognition, wherein at least one segment of the movement path identified as an unintentional movement is replaced by an interpolation, wherein the unintentional movement is determined when the movement path exceeds a second predetermined threshold and wherein the interpolation is a cubic spline interpolation and starts at a start of the at least one segment and ends at an end of the at least one segment.
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Abstract
The invention relates to a method for the contactless detection and recognition of gestures in a three-dimensional movement space (3D gestures), wherein
- in an electrical near-field which defines the three-dimensional movement space, deformations of the electrical near-field are detected which can be performed by movements of at least one object, e.g. one or two fingers in the three-dimensional movement space,
- at least one movement path is generated from the detected deformations of the electrical near field, which corresponds to the movement of the at least one object in the three-dimensional movement space, and
- wherein during the generation of the movement path in the movement path a gesture start is determined, wherein beginning with the gesture start the gesture is extracted from the movement path.
The invention also relates to a system for the contactless detection and recognition of gestures in a three-dimensional movement space.
17 Citations
33 Claims
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1. A method for the contactless detection and recognition of gestures in a three-dimensional movement space, wherein the gesture comprises an unintentional movement, the method comprising the steps of:
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generating an electrical near-field, which defines the three-dimensional movement space; moving an object in the three-dimensional movement space in a contactless fashion, wherein a movement of the object comprises an unintentional movement, detecting deformations of the electrical near-field caused by the movements of the object in the three-dimensional movement space by a plurality of sensors providing a plurality of sensor signals, generating from the detected deformations of the electrical near-field at least one movement path corresponding to the movement of the object in the three-dimensional movement space, during the generation of the movement path in the movement path determining a gesture start, wherein beginning with the gesture start the gesture is extracted from the movement path, wherein a gesture start is detected when one or more measured variables exceed one or more respective predefined thresholds, after detecting the gesture start, feeding the movement path starting at the gesture start and ending at a gesture end to a pattern recognition, wherein at least one segment of the movement path identified as an unintentional movement is replaced by an interpolation, wherein the unintentional movement is determined when the movement path exceeds a second predetermined threshold and wherein the interpolation is a cubic spline interpolation and starts at a start of the at least one segment and ends at an end of the at least one segment. - 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)
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25. A system for the contactless detection and recognition of gestures in a three-dimensional movement space, comprising
an electrical near-field generator which defines the three-dimensional movement space and comprises at least one transmitting electrode, at which an alternating electrical field is emitted, and at least one signal generator, which is coupled with the at least one transmitting electrode, for charging the at least one transmitting electrode with an electric alternating signal, an electric near field detector for detecting deformations of the electrical near-field caused by movements of at least one object in the three-dimensional movement space; -
an analyzing unit for generating from the detected deformations of the electrical near-field a movement path corresponding to the movement of the object; and wherein the analyzing unit is configured to detect a gesture start and optionally a gesture end in the movement path while the movement path is being generated, wherein the analyzing unit is configured to detect a gesture start when one or more measured variables exceed respective predefined thresholds; and
if a continuous extraction is to be performed;to continuously extract the gesture from the movement path beginning with the gesture start and to continuously generate output values wherein the continuously generated output values are used to display information on a display device such that the displayed information is substantially synchronous with the movement of the object; and if a discrete extraction is to be performed; to forward the movement path received between a gesture start and the gesture end to a pattern recognition system, wherein at least one segment of the movement path identified as an unintentional movement is replaced by an interpolation, wherein the unintentional movement is determined when the movement path exceeds a second predetermined threshold and wherein the interpolation is a cubic spline interpolation and starts at a start of the at least one segment and ends at an end of the at least one segment. - View Dependent Claims (26, 27, 28, 29)
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30. A method for the contactless detection and recognition of gestures in a three-dimensional movement space, the method comprising the steps of:
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generating an electrical near-field, which defines the three-dimensional movement space; moving an object in the three-dimensional movement space, detecting deformations of the electrical near-field caused by the movements of the object in the three-dimensional movement space by a plurality of sensors providing a plurality of sensor signals, generating from the detected deformations of the electrical near-field at least one movement path corresponding to the movement of the object in the three-dimensional movement space, during the generation of the movement path in the movement path determining a gesture start, wherein beginning with the gesture start the gesture is extracted from the movement path, wherein a gesture start is detected if one or more measured variables exceed respective predefined thresholds, wherein the extraction of at least one gesture from the movement path includes a discrete and a continuous extraction of a gesture and wherein for a discrete extraction, the gesture is completely fed to a pattern recognition as soon as a gesture end of the gesture has been determined, and for the continuous extraction, after the detection of the gesture start the movement path is continuously evaluated and output values are generated continuously wherein the continuously generated output values are used to display information on a display device such that the displayed information is substantially synchronous with the movement of the object, wherein at least one segment of the movement path identified as an unintentional movement is replaced by an interpolation, wherein the unintentional movement is determined when the movement path exceeds a second predetermined threshold and wherein the interpolation is a cubic spline interpolation and starts at a start of the at least one segment and ends at an end of the at least one segment. - View Dependent Claims (31, 32)
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33. A system for the contactless detection and recognition of gestures in a three-dimensional movement space, wherein the gesture comprises an unintentional movement, comprising
an electrical near-field generator which defines the three-dimensional movement space and comprises at least one transmitting electrode, at which an alternating electrical field is emitted, and at least one signal generator, which is coupled with the at least one transmitting electrode, for charging the at least one transmitting electrode with an electric alternating signal, an electric near field detector for detecting deformations of the electrical near-field caused by movements of at least one object in the three-dimensional movement space; -
an analyzing unit for generating from the detected deformations of the electrical near-field a movement path corresponding to the movement of the object; and wherein the analyzing unit is configured to detect a gesture start and a gesture end in the movement path while the movement path is being generated, wherein the analyzing unit is configured to detect a gesture start if one or more measured variables exceed one or more respective predefined thresholds, and after detecting the gesture start, to feed the movement path starting at the gesture start and ending at a gesture end to a pattern recognition system, wherein at least one segment of the movement path identified as an unintentional movement is replaced by an interpolation, wherein the unintentional movement is determined when the movement path exceeds a second predetermined threshold and wherein the interpolation is a cubic spline interpolation and starts at a start of the at least one segment and ends at an end of the at least one segment.
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Specification