The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 2021
Filed:
Sep. 07, 2018
Tobii Ab, Danderyd, SE;
Simon Johansson, Danderyd, SE;
Mark Ryan, Danderyd, SE;
Tobii AB, Danderyd, SE;
Abstract
An eye tracking system having circuitry configured to perform a method is disclosed. An estimated radius (r) from an eyeball center to a pupil center in an eye is obtained, and an estimated eyeball center position (e) in the eye in relation to an image sensor for capturing images of the eye is determined, and an image of the eye captured by means of the image sensor, and a position of a representation of the pupil center in the eye in the obtained image is identified. An estimated pupil center position (p') is then determined based on the estimated eyeball center position (e), the estimated radius (r), and the identified position of the representation of the pupil center in the obtained image.