Automatic eye tracker for e.g. controlling computer system, has mask to alter basic optical transfer function of lens structure and image sensor into enhanced optical transfer function

摘要

The tracker has an optical system (110) to receive incoming light (LS) from a scene containing a subject and to direct the light towards an image sensor (130), for producing primary data (Ds). A mask (120) alters a basic optical transfer function of a lens structure (111, 112) and the sensor into an enhanced optical transfer function, which is less sensitive to variations of an unknown distance (R) between the system and the subject. A processing unit (140) processes the data to produce resulting eye-tracking data (DEYE) representing a position estimate and gaze direction of an eye (101). Independent claims are also included for the following: (1) a method of automatically registering and tracking eye of a subject (2) a computer program including instructions for automatically registering and tracking eye of a subject (3) a computer readable medium having a program including instructions for automatically registering and tracking eye of a subject.