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. 13, 2014
Filed:
Jun. 25, 2010
Björn Drobe, Charenton-le-Pont, FR;
Guillaume Giraudet, Charenton-le-Pont, FR;
Björn Drobe, Charenton-le-Pont, FR;
Guillaume Giraudet, Charenton-le-Pont, FR;
Essilor International (Compagnie Generale d'Optique, Charenton-le-Pont, FR;
Abstract
The invention relates to a method for characterizing a perception of blur by a subject () in order to determine a dioptric blur value for an image (C) observed by the subject. The image has a blur generated by the low-pass filtering of the image components in accordance with the respective space frequencies of said image components. An indication of the perception thereof of blur in the image is provided by the subject and is associated with the dioptric blur value. Several images associated with different dioptric blur values are used for defining a dioptric blur threshold value for the subject that corresponds to a blur perception criterion. The invention can be used for adjusting the design of a progressive lens for the subject in accordance with the sensitivity to said visual blur of said object.