Theoretical interpretation of drivers’ gaze strategy influenced by optical flow

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...

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Autores principales:	Yuki Okafuji, Takanori Fukao
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/04970491da0642afbf3aec624deb3d9e
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id	oai:doaj.org-article:04970491da0642afbf3aec624deb3d9e
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spelling	oai:doaj.org-article:04970491da0642afbf3aec624deb3d9e2021-12-02T13:57:25ZTheoretical interpretation of drivers’ gaze strategy influenced by optical flow10.1038/s41598-021-82062-12045-2322https://doaj.org/article/04970491da0642afbf3aec624deb3d9e2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-82062-1https://doaj.org/toc/2045-2322Abstract 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.Yuki OkafujiTakanori FukaoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yuki Okafuji Takanori Fukao Theoretical interpretation of drivers’ gaze strategy influenced by optical flow
description	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.
format	article
author	Yuki Okafuji Takanori Fukao
author_facet	Yuki Okafuji Takanori Fukao
author_sort	Yuki Okafuji
title	Theoretical interpretation of drivers’ gaze strategy influenced by optical flow
title_short	Theoretical interpretation of drivers’ gaze strategy influenced by optical flow
title_full	Theoretical interpretation of drivers’ gaze strategy influenced by optical flow
title_fullStr	Theoretical interpretation of drivers’ gaze strategy influenced by optical flow
title_full_unstemmed	Theoretical interpretation of drivers’ gaze strategy influenced by optical flow
title_sort	theoretical interpretation of drivers’ gaze strategy influenced by optical flow
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/04970491da0642afbf3aec624deb3d9e
work_keys_str_mv	AT yukiokafuji theoreticalinterpretationofdriversgazestrategyinfluencedbyopticalflow AT takanorifukao theoreticalinterpretationofdriversgazestrategyinfluencedbyopticalflow
_version_	1718392300385599488

Theoretical interpretation of drivers’ gaze strategy influenced by optical flow

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