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. 15, 2015
Filed:
Aug. 09, 2011
Applicant:
Yoshinobu Ebisawa, Hamamatsu, JP;
Inventor:
Yoshinobu Ebisawa, Hamamatsu, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K 9/00 (2006.01); G06T 7/00 (2006.01); A61B 3/113 (2006.01);
U.S. Cl.
CPC ...
G06T 7/004 (2013.01); A61B 3/113 (2013.01); G06K 9/00604 (2013.01);
Abstract
A gaze point detection devicecomprises two stereo camerasfor acquiring a face image of a subject A, light sourcesdisposed on the outside of apertures, a control circuit, and an image processor. The image processorcalculates a vector r from a corneal reflection point to a pupil on a plane perpendicular to reference lines of the stereo cameras, computes an angle θ of lines of sight of the subject A with respect to the respective reference lines by using a function f, corrects the function fsuch that directions of lines of sight are closer to each other, and calculates the line of sight directions to detect a gaze point Q on a display screen.