Abstract
This publication describes systems and techniques to adaptively adjust a maximum touch-size threshold to ignore inadvertent touches of the display and to accommodate different finger sizes while preventing the use of facsimiles or other objects that may be used in spoof attacks to fool an under-display fingerprint sensor (UDFPS). In aspects, if an object touched to the display exceeds a maximum touch-size threshold, the touch may be disregarded to prevent inadvertent touches of a hand from triggering a fingerprint rejection or to reduce a spoof accept rate (SAR) of attempts to improperly access a device. In other aspects, if an otherwise successfully matched fingerprint exceeds a maximum touch-size threshold, the maximum touch-size threshold may be increased to accommodate larger fingers. In other aspects, if the maximum touch-size threshold is larger than fingerprints presented in a number of authentication attempts, the maximum touch-size threshold may be adaptively reduced. If an adjusted maximum touch-size threshold is reduced too far, resulting in multiple authentication failures, the maximum touch-size threshold may be adjusted to avoid subsequent authentication failures.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
Eltoft, Justin; Chen, Kris; and Hsieh, Leo, "Adaptive Maximum Fingerprint Touch-Size Threshold for Reduced Unintended Authentication Attempts and Reduced Spoof Accept Rate", Technical Disclosure Commons, (November 22, 2024)
https://www.tdcommons.org/dpubs_series/7586