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

摘要

An eye state detection apparatus includes a camera, a first calculator, a memory, a second calculator, and a third calculator. The camera obtains a plurality of face images of a driver. The first calculator calculates an opening amount of an eye of the driver based on each face image. The memory stores the opening amounts calculated by the first calculator. The second calculator groups the opening amounts into a plurality of groups in a sequential manner, calculates a group distribution of each group, calculates an entire distribution of all of the opening amounts, and sets the entire distribution as a reference distribution when a difference among the group distributions is within a predetermined range. The third calculator 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.

主权项

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; andcalculating 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.