1. A computer-implemented method for detecting facial liveliness, comprising: processing, by one or more processors, an image associated with a face of a subject to determine a corneal reflection of an illuminator adjacent to the subject, the image being captured at a time point and including a representation of a corneal region of the subject that has the corneal reflection of the illuminator; determining, by the one or more processors, an expected corneal reflection of the illuminator based on an illumination of the illuminator at the time point; comparing, by the one or more processors, a correlation between the determined corneal reflection of the illuminator and the expected corneal reflection of the illuminator to a threshold determined based on a varying context-dependent requirement; and determining, by the one or more processors and based on a result of the comparison, whether the face of the subject is live.