| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve the safety of a vehicle by detecting a driver's asthenopic state. <P>SOLUTION: The driver's state estimation device 1 comprises a viewing object depth detection means 3a detecting the depth to a viewing object; and a visual function estimation means 3b estimating the driver's visual function state based on the magnitude relation between the depth detected by the viewing object depth detection means 3a and a predetermined distance. The visual function estimation means 3b can estimate the driver's visual function state based on the frequency per unit time of the depth detected by the viewing object depth detection means 3a being smaller than the predetermined distance. <P>COPYRIGHT: (C)2007,JPO&INPIT |
