Adapting a quality threshold for a fingerprint image
AssigneeInvenSense, Inc.
InventorHarihar Narasimha-Iyer
Life of this patent
Estimating the term…
Abstract
In a method for adapting a quality threshold for a fingerprint image, a fingerprint image is received. An image quality of the fingerprint image is determined. Provided the image quality of the fingerprint image does not satisfy a quality threshold, the quality threshold is decreased. Provided the image quality of the fingerprint image does satisfy a decreased quality threshold, the fingerprint image is forwarded to a matcher for fingerprint authentication.
Claims19
A method for adapting a quality threshold for a fingerprint image, the method comprising:
- performing enrollment of a user, wherein the performing the enrollment of the user comprises:
- receiving at least one enrollment image of a fingerprint of the user;
- determining quality information for the user based at least in part on the at least one enrollment image;
- and
- determining a quality threshold based at least in part on the quality information;
- receiving a fingerprint image;
- determining an image quality of the fingerprint image;
- provided the image quality of the fingerprint image does not satisfy the quality threshold, decreasing the quality threshold;
- and
- provided the image quality of the fingerprint image does satisfy a decreased quality threshold, forwarding the fingerprint image to a matcher for fingerprint authentication.
A method for adaptation of a quality threshold for a fingerprint image, the method comprising:
- performing enrollment of a user, wherein the performing the enrollment of the user comprises:
- receiving at least one enrollment image of a fingerprint of the user;
- determining quality information for the user based at least in part on the at least one enrollment image;
- and
- determining an initial value of a quality threshold based at least in part on the quality information;
- monitoring for a change in an environmental factor impacting an image quality of a captured fingerprint image;
- responsive to detecting the change in the environmental factor, adapting the initial value of the quality threshold of a fingerprint image quality determination operation, wherein the adapting the initial value of the quality threshold of the fingerprint image quality determination operation comprises:
- provided the environmental factor is indicative of a degradation in the image quality, decreasing the initial value of the quality threshold;
- and
- provided the environmental factor is indicative of an increase in the image quality, increasing the initial value of the quality threshold;
- and
- responsive to receiving a fingerprint image, using an adapted quality threshold during the fingerprint image quality determination operation in determining whether to forward the fingerprint image to a matcher for fingerprint authentication.
A method for adaptation of a quality threshold for a fingerprint image, the method comprising:
- receiving a plurality of fingerprint images captured over a time range;
- monitoring a fingerprint image quality determination operation of the plurality of fingerprint images over the time range, wherein the fingerprint image quality determination operation is configured to adapt a quality threshold responsive to a fingerprint image not satisfying the quality threshold;
- responsive to detecting a trend indicative of a change in image quality of the plurality of fingerprint images, adapting an initial value of the quality threshold;
- and
- responsive to receiving a new fingerprint image, using an adapted quality threshold in determining whether to forward the fingerprint image to a matcher for fingerprint authentication.
Dependencies are inferred from the claim text.