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:
May. 03, 2016
Filed:
Dec. 07, 2011
Applicant:
Yoshinobu Ebisawa, Hamamatsu, JP;
Inventor:
Yoshinobu Ebisawa, Hamamatsu, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61B 3/113 (2006.01); G06K 9/00 (2006.01); G06F 3/01 (2006.01); G02B 27/00 (2006.01);
U.S. Cl.
CPC ...
G06F 3/013 (2013.01); A61B 3/113 (2013.01); G02B 27/0093 (2013.01); G06K 9/00604 (2013.01);
Abstract
A gaze point detection devicehas four cameras, light sources, control circuits, and an image processor. The image processorcalculates vectors r, each of which is from a corneal reflection point to the center of a pupil, on a plane that is vertical to base lines. The image processoralso calculates angles θ of the line of sight on the basis of the vectors r and by using a function f including M parameters. Moreover, the image processordetermines the M parameters based on the angles θ, and detects a point of gaze Q based on the line of sight direction calculated using the determined parameters. The number of cameras is set at M×½ or higher.