USE OF FINGERPRINT SCANNING SENSOR DATA TO DETECT FINGER ROLL AND PITCH ANGLES
First Claim
1. A method for detecting finger roll angle information from measurement data produced by a fingerprint scanning sensor, the roll angle defined with respect to a reference position of the finger in contact with the fingerprint sensor, the method comprising:
- receiving measurement data from a fingerprint scanning sensor having a touch surface and creating spatial measurement data responsive to a finger contacting the touch surface with a measurable contact area;
processing the spatial measurement data with an algorithm producing at least two statistical quantities derived from the spatial measurement data;
performing calculations on the at least two statistical quantities to obtain at least one calculated quantity responsive to the roll angle of the finger with respect to a reference position of the finger; and
providing output information responsive to the at least one calculated quantity,wherein the output information is responsive to the roll angle of the finger.
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Accused Products
Abstract
A method for detecting roll angles of a finger in contact with a fingerprint scanning sensor is described. The method includes obtaining spatial measurement data of a measurable contact area from a touch surface of a fingerprint scanning sensor, using an algorithm to create at least two statistical quantities from this spatial measurement data, using the statistical quantities to generate at least one measurement of a finger roll angle with respect to a reference position, and providing the roll angle measurement for external uses. This method can also be used to detect pitch angles of a finger contacting a fingerprint scanning sensor. The roll and pitch angles are calculated in real time and used for controlling applications on electronic devices such as computers and mobile phones.
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Citations
20 Claims
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1. A method for detecting finger roll angle information from measurement data produced by a fingerprint scanning sensor, the roll angle defined with respect to a reference position of the finger in contact with the fingerprint sensor, the method comprising:
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receiving measurement data from a fingerprint scanning sensor having a touch surface and creating spatial measurement data responsive to a finger contacting the touch surface with a measurable contact area; processing the spatial measurement data with an algorithm producing at least two statistical quantities derived from the spatial measurement data; performing calculations on the at least two statistical quantities to obtain at least one calculated quantity responsive to the roll angle of the finger with respect to a reference position of the finger; and providing output information responsive to the at least one calculated quantity, wherein the output information is responsive to the roll angle of the finger. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for detecting finger pitch angle information from measurement data produced by a fingerprint scanning sensor, the pitch angle defined with respect to a reference position of the finger in contact with the fingerprint sensor, the method comprising:
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receiving measurement data produced by a fingerprint scanning sensor having a touch surface and creating spatial measurement data responsive to a finger contacting the touch surface with a measurable contact area; processing the spatial measurement data with an algorithm producing at least two statistical quantities derived from the spatial measurement data; performing calculations on the at least two statistical quantities to obtain at least one calculated quantity responsive to the pitch angle of the finger with respect to a reference position of the finger; and providing output information responsive to the at least one calculated quantity, wherein the output information is responsive to the pitch angle of the finger. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification