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Eye state detection apparatus and method of detecting open and closed states of eye

  • US 9,082,012 B2
  • Filed: 11/27/2012
  • Issued: 07/14/2015
  • Est. Priority Date: 12/06/2011
  • Status: Active Grant
First Claim
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1. An eye state detection apparatus comprising:

  • a camera that obtains a plurality of face images of a driver;

    a first calculator that calculates an opening amount of an eye of the drier based on each of the face images obtained by the camera;

    a memory that stores the opening amounts calculated by the first calculator in a sequential manner;

    a second calculator;

    grouping the opening amounts stored in the memory into a plurality of groups in a time-sequential manner;

    calculating a group distribution of the opening amounts included in each of the groups; and

    calculating an entire distribution of the opening amounts included in all of the groups, and setting the entire distribution of the opening amounts as a reference distribution of the opening amounts when a difference among the group distributions of all of the groups is within a predetermined range; and

    a third calculator that calculates an opening degree of the eye based on the reference distribution of the opening amounts when the reference distribution of the opening amounts is calculated by the second calculator.

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