| 摘要 |
<P>PROBLEM TO BE SOLVED: To determine an aimless state of a determined object by easy processing with stable accuracy. <P>SOLUTION: The following processes are repeated; acquiring an image obtained by imaging a driver's face (52), computing an eye rotation angle (54), determining whether a saccade occurs or not by comparing a vector size T of the eye rotation speed with a predetermined value T<SB>θ</SB>(60), and computing and memorizing the amplitude and the direction of the detected saccade (74) while computing and memorizing (76, 78) the line position of the driver's sight. When the determination period of the aimless state arrives (a process 80 is yes), it determines in order of the following processes; the ratio of saccade with the amplitude being the predetermined value A or below is larger than the threshold Ta or not (84), and the ratio of saccade within the area where the direction is classified in the longitudinal direction is smaller than the threshold Td or not (88), and the numbers of positions where the line positions of sight gather are two or above or not (92). If any of the determinations are affirmed, the aimless state is determined and an alarm output (94) and the like is performed. <P>COPYRIGHT: (C)2011,JPO&INPIT |
