Method of evaluating the state of alertness of a vehicle driver

Method of evaluating the state of alertness of a vehicle driver based on the analysis of the eyelid movements of the driver. A classification of blink durations composed of m classes defined mathematically, and a classification of states of alertness composed of n alertness state classes including a class corresponding to an "alert" state and a class corresponding to a "sleepy" state, delimited by given thresholds of numbers of medium and long duration blinks, are set up. During an evaluation, a duration vector is associated with each blink, of which each component represents the degree of membership of the blink in one of the predefined duration classes, temporal analysis windows are defined at the end of each of which a cumulative duration vector is calculated of which each component consists of the sum SigmaM,SigmaL of same row components of duration vectors.