@article{ref1,
title="A study of feature factors on sleepy expressions based on observational analysis of facial images",
journal="Transactions of Society of Automotive Engineers of Japan",
year="2008",
author="Ishida, Kenji and Ito, Akiko and Kimura, Teiyuu",
volume="39",
number="3",
pages="3_251-3_256",
abstract="We researched feature factors of sleepiness expression to do observational analysis about some driver's facial images during a monotonous driving task. It was found that not only eyes condition&quot; which was generally investigated but also &quot;cheeks and oris relaxation&quot; &quot;eyebrows raising&quot;, &quot;head slant&quot; and &quot;oris movement&quot; were selected as the factors.<p /> <p>Language: ja</p>",
language="ja",
issn="0287-8321",
doi="10.11351/jsaeronbun.39.3_251",
url="http://dx.doi.org/10.11351/jsaeronbun.39.3_251"
}