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An Analysis of Saccadic Eye Movements and Facial Images for Assessing Vigilance Levels During Simulated Driving

  • Akinori Ueno
  • Shoyo Tei
  • Tomohide Nonomura
  • Yuichi Inoue
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5639)

Abstract

The authors analyzed facial video recordings and saccadic eye movements during 1-hour simulated driving in 10 subjects. Mean cross-correlation coefficient between the visually determined facial sleepiness and the proposed index of saccade (i.e. PV/D) for 9 subjects was -0.56 and the maximum coefficient of inverse cross-correlation was 0.83. Mean cross-correlation coefficient for 6 repetitive measurements for another subject was -0.72, and the maximum was 0.84. Variation in PV/D preceded that in facial sleepiness in 13 of 15 measurements and syncronized with it in other 2 measurements. From these results, we confirmed a fair potential of the PV/D to detect decline in vigilance levels earlier than facial sleepiness. We also revealed that narrow fluctuations throughout the measurement could lead to low inverse cross-correlation below 0.60 between the two indices. Therefore experimenter should pay attention to designing the experimental procedure to ensure broad fuctuations of the subject’s vigilance levels in the measurement.

Keywords

doze prevention saccade facial sleepiness advanced safety vehicle 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Akinori Ueno
    • 1
  • Shoyo Tei
    • 2
  • Tomohide Nonomura
    • 2
  • Yuichi Inoue
    • 3
  1. 1.Department of Electric and Electronic Engineering, School of EngineeringTokyo Denki UniversityTokyoJapan
  2. 2.Master’s Program of Electronic and Computer Engineering, Graduate School of Science and EngineeringGraduate School of Tokyo Denki UniversitySaitamaJapan
  3. 3.Japan Somnology CenterNeuropsychiatric Research InstituteTokyoJapan

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