We first investigated the effect of Observing Time Interval (OTI) on the separability of sample distributions of LDBF and PERCLOS under drowsy and conscious states to select the best OTI.

• 我们首先研究观察的时间间隔对于利用眼睛闭合程度与眨眼频率来侦测昏睡状态的影响，并且找出最佳的观察时间间隔。