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:
Feb. 07, 2023
Filed:
Feb. 11, 2020
Aisin Corporation, Kariya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Shin-ichi Kojima, Nagakute, JP;
Shin Osuga, Kariya, JP;
Takashi Kato, Kariya, JP;
Yuya Yamada, Kariya, JP;
Takeshi Matsumura, Toyota, JP;
AISIN CORPORATION, Kariya, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
A line-of-sight measurement device includes: an imaging unit that images a face of a subject; a light illumination unit that illuminates light to an eye of the subject; a camera coordinate system eyeball center coordinate calculation unit that estimates coordinates of an eyeball center, from a face image imaged by the imaging unit; a pupil center calculation unit that estimates coordinates of an apparent pupil center, from a pupil center position on the face image; an eyeball position orientation estimation unit that calculates an optical axis vector toward the pupil center from the eyeball center on the basis of the coordinates of the eyeball center and the apparent pupil center; a corneal reflection image calculation unit that obtains coordinates of a corneal reflection image on the basis of the coordinates of the eyeball center, the optical axis vector, and a predetermined eyeball model; and an image coordinate calculation unit that estimates image coordinates of a corneal reflection image on the face image, from the coordinates of the corneal reflection image.