1. A method comprising: receiving, by a computing device from a user, a first indication that the user wishes to authenticate himself or herself with the computing device via face verification; in response to the first indication, capturing, by the computing device using a camera, a first series of images of the user's face; authenticating, by the computing device, the user by evaluating each of the first series of images against a face template for the user, wherein the user is authenticated based on an N-th image in the first series; and subsequently to the authenticating: selecting, by the computing device, one or more images from the first series prior to the N-th image; and adding, by the computing device, the one or more images to the face template for the user.