The position of an eye is detectable with high precision from a face image of a person taken under near infrared illumination or the like. After pre-processing, the face image is subjected to brightness correction to increase the contrast between the sclera portion and iris portion of the eye. Brightness...http://www.google.de/patents/US7130453?utm_source=gb-gplus-sharePatent US7130453 - Eye position detection method and device
