The present invention relates to a method for determining a level of drowsiness of a motor vehicle driver from a predetermined image analysis algorithm, said vehicle comprising a camera (11) and a computer (12 ), said computer (12) implementing said predetermined algorithm from a set comprising at least one parameter relating to the attitude of the driver, the method, implemented by the computer (12), comprising a phase of learning (PH1) and a monitoring phase (PH2) of the driver's state. Figure for the abstract: Fig. 2
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