Security system utilizing gesture recognition
First Claim
1. A security system for restricting access to an item of interest, comprising:
- a gesture input interface configured to convert a continuous gesture from a user into an input trajectory;
a normalization component configured to resample the input trajectory to produce a resampled trajectory having a standard size;
a reference point generator configured to reduce the resampled trajectory to respective values for a set of reference points, each of the values for the set of reference points having at least two associated coordinates;
at least one authentication region, each of the at least one authentication region representing at least one of the set of reference points, such that each authentication region is defined within a multidimensional feature space having dimensions corresponding to the at least two coordinates associated with each of the at least one points associated with the authentication region from respective sets of representative statistics for the at least one of the set of reference points represented by the authentication region;
a verification component configured to determine if the values for the set of reference points from a given input falls within the at least one authentication region;
an access restriction mechanism configured to restrict access to the item of interest unless a threshold number of values for the set of reference points from the input falls within their associated authentication regions; and
a parameter calculation component configured to receive training data representing a characteristic gesture for the user, the characteristic gesture comprising values for the set of reference points generated by the normalization component and the reference point generator and derived from a user input at the gesture input interface, the parameter calculation component being further configured to calculate a respective one of the sets of representative statistics for each of the set of reference points, the respective one of the sets of representative statistics comprising a mean value for each of the at least two associated coordinates, a variance value for each of the at least two associated coordinates, and a covariance between a first coordinate and a second coordinate of the at least two associated coordinates.
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Abstract
Systems and methods are provided for restricting access to an item of interest. A normalization component resamples an input trajectory to produce a resampled trajectory having a standard size. A reference point generator reduces the resampled trajectory to respective values for a set of reference points, each having at least two associated coordinates. The system further includes at least one authentication region. Each of the at least one authentication region represents at least one of the set of reference points. A verification component is configured to determine if the values for the set of reference points from a given input falls within the at least one authentication region. An access restriction mechanism restricts access to the item of interest unless a threshold number of values for the set of reference points from the input falls within their associated authentication regions.
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Citations
19 Claims
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1. A security system for restricting access to an item of interest, comprising:
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a gesture input interface configured to convert a continuous gesture from a user into an input trajectory; a normalization component configured to resample the input trajectory to produce a resampled trajectory having a standard size; a reference point generator configured to reduce the resampled trajectory to respective values for a set of reference points, each of the values for the set of reference points having at least two associated coordinates; at least one authentication region, each of the at least one authentication region representing at least one of the set of reference points, such that each authentication region is defined within a multidimensional feature space having dimensions corresponding to the at least two coordinates associated with each of the at least one points associated with the authentication region from respective sets of representative statistics for the at least one of the set of reference points represented by the authentication region; a verification component configured to determine if the values for the set of reference points from a given input falls within the at least one authentication region; an access restriction mechanism configured to restrict access to the item of interest unless a threshold number of values for the set of reference points from the input falls within their associated authentication regions; and a parameter calculation component configured to receive training data representing a characteristic gesture for the user, the characteristic gesture comprising values for the set of reference points generated by the normalization component and the reference point generator and derived from a user input at the gesture input interface, the parameter calculation component being further configured to calculate a respective one of the sets of representative statistics for each of the set of reference points, the respective one of the sets of representative statistics comprising a mean value for each of the at least two associated coordinates, a variance value for each of the at least two associated coordinates, and a covariance between a first coordinate and a second coordinate of the at least two associated coordinates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for training a gesture based security system, comprising:
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generating a plurality of input trajectories from a user representing a characteristic gesture for the user; normalizing the plurality of input trajectories to produce a set of normalized trajectories having a standard set of dimensions; reducing each normalized trajectory to a standard set of substantially evenly spaced reference points, each reference point having at least two associated coordinates; calculating representative statistics for each of the reference spaced points across the plurality of input trajectories to provide a mean for each of the at least two associated coordinates associated with the point, a variance for each of the at least two associated coordinates, and a covariance between at least a first of the at least two coordinates and a second of the at least two coordinates; and defining respective authentication regions in at least one feature space defined by the associated coordinates of the set of reference points as an authentication range for inputs from the user, the respective authentication regions for the at least one feature space each having at least one associated point from the set of reference points and being defined according to the mean for each of the at least two associated coordinates associated with each of the at least one associated point, a variance for each of the at least two associated coordinates associated with each of the at least one associated point, and a covariance between at least a first of the at least two coordinates and a second of the at least two coordinates associated with each of the at least one associated point. - View Dependent Claims (11, 12, 13, 14)
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15. A security system for authenticating a user, comprising:
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an input device configured to convert a gesture by a user into a trajectory representing a motion of the user over time; a normalization component configured to resample the trajectory to produce a resampled trajectory having a standard size; a reference point generator configured to define a standard number of substantially equidistant reference points on the resampled trajectory, each of the reference points having at least two associated coordinate values; a parameter calculation component configured to calculate representative statistics across a plurality of gestures from a user for the reference points, the representative statistics comprising at least one covariance value between a first coordinate and a second coordinate associated with one of the reference points; at least one authentication region, each of the at least one authentication region representing at least one of the set of reference points, such that each authentication region is defined within a multidimensional feature space having dimensions corresponding to the at least two coordinates associated with each of the at least one points associated with the authentication region according to the representative statistics for the reference points associated with the authentication; and a verification component configured to determine if the coordinate values for the set of reference points from a given input fall within the at least one authentication region. - View Dependent Claims (16, 17, 18, 19)
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Specification