A method includes receiving probe image data associated with a biometric authentication request on a mobile device. A first classifier is employed to generate a first probability metric of the probe image data being associated with the authorized user. The biometric authentication request is approved responsive to the first probability metric being greater than a first threshold. The biometric authentication request is denied responsive to the first probability metric being less than a second threshold. Responsive to the probability metric being between the first and second thresholds, a second classifier is employed to generate a second probability metric of the probe image data being associated with the authorized user. The biometric authentication request is approved responsive to the second probability metric being greater than a third threshold.
@misc{andalo18uspto,
authors = "Fernanda A. Andal{\'o} and Rafael Padilha and Waldir R. Almeida and Gabriel Bertocco and Jacques Wainer and Ricardo da S. Torres and Anderson Rocha",
title = "Multiple-tiered facial recognition",
number = "US 15⁄918,462",
year = 2018,
note = "USPTO Patent",
}