A dozing-off detection method and device are capable of accurately detecting repeated blinking by using a simple device, and exhibit improved speed and accuracy in dozing-off detection. When the eyes of a person transition from a closed state to an open state, the state during which the eyes are mostly open is considered eyes-open time, while all other states are considered eyes-closed time. A period of time that is relatively shorter than the average interval between blinking for a healthy adult in a state of wakefulness is set as a first threshold interval. A period of time that is relatively longer than the average amount of time that a healthy adult in a state of wakefulness closes their eyes is set as a second threshold interval. When eyes are detected to be open for a shorter time than the first threshold interval, the blinking therebefore and thereafter is considered repeated blinking. Dozing off is determined to have occurred when the time eyes are closed, during the blinking that occurs during said repeated blinking after the eyes are open for a shorter time than the first threshold interval, is equal to or longer than the second threshold interval. Dozing off is immediately determined to have occurred when the time eyes are closed, during the blinking that occurs during said repeated blinking before the eyes open for less than the first threshold interval, is equal to or longer than the second threshold interval. Dozing off is also determined to have occurred when eyes are closed for a relatively longer time than the second threshold interval.L'invention concerne un procédé et un dispositif de détection de somnolence qui sont aptes à détecter avec précision un clignement répété par utilisation d'un dispositif simple, et présentent une vitesse et une précision améliorées de détection de somnolence. Lorsque les yeux d'une personne passent d'un état fermé à un état ouvert, l'état durant lequel les yeux sont pratiquement ouverts est considéré comme un temps d'
