| 摘要 |
<p>To provide a doze detection method and an apparatus thereof, using a simple device, with which it is possible to accurately detect a blink burst and to improve the speed and the accuracy of doze detection. Among states from an eye closure to an eye opening of a human eye, a state where the eye is substantially open is defined as an open eye time and the other state is defined as a closed eye time. A time that is relatively shorter than an average blink interval of healthy adult in an alert state is defined as a first threshold time. A time that is relatively longer than an average closed eye time of healthy adult in an alert state is defined as a second threshold time. When detecting an eye opening equal to or shorter than the first threshold time, blinks before and after the eye opening are defined as a blink burst. It is determined to be a doze state when a closed eye time of a blink among the blinks during the blink burst reaches the second threshold time or more, the blink occurring after an open eye time equal to or shorter than the first threshold time. It is immediately determined to be a doze state when a closed eye time of a blink among the blinks during the blink burst is equal to or longer than the second threshold time, the blink occurring before an open eye time equal to or shorter than the first threshold time. It is determined to be a doze state also in a case of an eye closure relatively longer than the second threshold time.</p> |
