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Device, program, and method for determining sleepiness

  • US 20080212828A1
  • Filed: 02/12/2008
  • Published: 09/04/2008
  • Est. Priority Date: 02/16/2007
  • Status: Active Grant
First Claim
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1. A sleepiness determination device comprising:

  • facial expression information obtaining means for obtaining at least two of facial expression information elements (A) to (K) associated with a facial image including;

    (A) a distance between left and right corners of a mouth;

    (B) a distance between an eyebrow and eye;

    (C) a tilt angle of a head;

    (D) a distance between the midpoint between inner corners of eyebrows and the midpoint between inner corners of eyes;

    (E) a distance between inner corners of eyebrows;

    (F) a distance between the midpoint between outer corners of a lower nose and the midpoint between inner corners of eyes;

    (G) a distance between the midpoint between corners of a mouth and the midpoint between inner corners of eyes;

    (H) a distance between a lower edge of a lower lip and the midpoint between inner corners of eyes;

    (I) a distance between upper and lower eyelids;

    (J) a distance between outer corners of a lower nose; and

    (K) a distance between an upper edge of an upper lip and the midpoint between inner corners of eyes; and

    sleepiness determination means for;

    determining a respective indication of sleepiness for each of the at least two facial expression information elements; and

    determining a level of sleepiness based on the respective indication of sleepiness for the each.

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