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:
Jan. 02, 2007
Filed:
Oct. 09, 2003
Richard Ian Taylor, Bracknell, GB;
Simon Michael Rowe, Bracknell, GB;
Richard Ian Taylor, Bracknell, GB;
Simon Michael Rowe, Bracknell, GB;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A gaze tracking system () is provided which obtains images of an operator () and processes the images to associate the images with coordinates of where the operators gaze is directed towards. In order to identify images where an operator is looking in the same direction, images obtained by a camera () are first processed using the retinex algorithm. Image patches from the processed image are then compared with stored feature images and an initial classification based upon the correspondence between areas of the processed image and the stored feature images is determined. This initial classification is then further processed and each image is assigned a single classification. The areas identified by different classifications are then determined so that classifications assigned to adjacent images identify points closer together and classifications never assigned to an adjacent images identify points further apart.