发明名称 |
DROWSINESS ASSESSMENT DEVICE AND PROGRAM |
摘要 |
Local maxima values and local minima values are derived from eyelid openness time series data in a segment in which a continuous closed eye period of extracted blinks is a specific time duration (for example 1 second) or longer. When plural local minima values are present in the segment of continuous closed eye period of 1 second or longer, blinks are extracted passing over and back through each variable closed eye threshold value of a variable closed eye threshold that is slid in a direction from the derived local maxima value towards the local minima value in set steps to a low value, and a inter-blink interval derived. Determination is made that a blink burst has occurred when the derived inter-blink interval is 1 second or less, and say greater than 0.2 seconds, thereby detecting a blink burst. Blink bursts can be detected with good precision, and the state of drowsiness can be assessed with good precision. |
申请公布号 |
EP2410501(A4) |
申请公布日期 |
2013.05.29 |
申请号 |
EP20100753557 |
申请日期 |
2010.03.17 |
申请人 |
AISIN SEIKI KABUSHIKI KAISHA;DENSO CORPORATION |
发明人 |
YODA, TAKUMI;OMI, TAKUHIRO;KADOYA, AKIRA;TANAKA, ISAHIKO |
分类号 |
G08G1/16;A61B5/18;B60R11/04 |
主分类号 |
G08G1/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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