Abstract
Driver analysis, particularly revealing where drivers gaze, is a key factor in understanding drivers’ perception. Several studies have examined drivers’ gaze behavior and the two main hypotheses that have been developed are Tangent Point (TP) and Future Path Point (FP). TP is a point on the inner side of the lane, where the driver’s gaze direction becomes tangential with the lane edge. FP is an arbitrary single point on the ideal future path for an individual driver on the road. The location of this single point is dependent on the individual driver. While these gaze points have been verified and discussed by various psychological experiments, it is unclear why drivers gaze at these points. Therefore, in this study, we used optical flow theory to understand drivers’ gaze strategy. Optical flow theory is a method to quantify the extent to which drivers can perceive the future path of the vehicle. The results of numerical simulations demonstrated that optical flow theory can potentially estimate drivers’ gaze behavior. We also conducted an experiment in which the observed driver gaze behavior was compared to calculated gaze strategy based on optical flow theory. The experimental results demonstrate that drivers’ gaze can be estimated with an accuracy of 70.8% and 65.1% on circular and straight paths, respectively. Thus, these results suggest that optical flow theory can be a determining factor in drivers’ gaze strategy.
Highlights
Driver analysis, revealing where drivers gaze, is a key factor in understanding drivers’ perception
The results showed no large difference based on road width or speed conditions, and the drivers often gazed at the Future Path Point (FP)
The reason why drivers gaze at the FP or Tangent Point (TP) has not been fully understood; the results of this study demonstrate that drivers’ gaze behavior might be determined by optical flow theory, which is the extent to which drivers can predict the future path of the vehicle
Summary
Revealing where drivers gaze, is a key factor in understanding drivers’ perception. These results suggest that optical flow theory can be a determining factor in drivers’ gaze strategy Humans use their visual systems to guide their locomotor control; in the driving context, drivers take advantage of visual information to safely operate their vehicles[1,2]. Several studies have attempted to elucidate drivers’ visual characteristics and, as shown in Fig. 15,6, there are two major hypotheses regarding guiding fixations directly related to steering performance: Tangent Point and Future Path Point These gaze behaviors have been compared and discussed through both naturalistic and simulated driving tasks. In this study, we assume that drivers’ gaze behavior can be interpreted by optical flow, which is one aspect of the information required for driving
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
