Patent ID: 7423540
Filing Date: 2008-09-09
Classification: G06K,G06T,G08B

Abstract:
1. A method for determining vehicle operator state for alerting the operator and comprising the steps of: generating a non-stereo video image of said operator from a single camera, said image comprising a right eye, a left eye and a nose; acquiring a first point, a second point and a third point of said image by a video processor, wherein the first point corresponds to the right eye, the second point corresponds to the left eye and the third point corresponds to the nose; establishing a first line through the first and second points; determining a cyclop's point centered between the first and second points and lying on the first line; establishing a second line drawn through the cyclop's point and disposed perpendicular to the first line; calculating a shortest squared second distance between the third point and the second line; utilizing the second distance to calculate a horizontal component of a head pose by the video processor; calculating a shortest squared first distance between the third point and the first line; and utilizing the first distance to calculate a vertical component of the head pose.