1. A computer-implemented method for detecting facial liveliness, comprising: processing, by one or more processors, a facial image of a subject to determine a corneal reflection of an illuminator adjacent to the subject, the facial image being captured at a time point; 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, the determined corneal reflection of the illuminator to the expected corneal reflection of the illuminator to obtain a comparison result; and determining, by the one or more processors, facial liveliness of the subject based on the comparison result.