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. 09, 2010
Filed:
Aug. 15, 2007
Gilles Baillet, Charenton le Pont, FR;
Bernard Bourdoncle, Charenton le Pont, FR;
Margalith Harrar, Charenton le Pont, FR;
Françoise Vienot, Paris, FR;
Gilles Baillet, Charenton le Pont, FR;
Bernard Bourdoncle, Charenton le Pont, FR;
Margalith Harrar, Charenton le Pont, FR;
Françoise Vienot, Paris, FR;
Essilor International (Compagnie Generale d'Optique), Charenton le Pont, FR;
Abstract
A quantitative evaluation of a color filter () in accordance with the capacity of said filter to restore hues comprises the use of a numerical color appearance model. Values of a perceptive attribute are calculated for hue samples (), by simulating the observation of each of the samples through the filter () and without a filter. The values of the perceptive attribute correspond to the visual perception of the samples by an observer (), and a deviation between the values with and without filter constitutes the result of the evaluation of the filter. Such a method makes it possible to quantitatively rank several color filters, and the ranking obtained corresponds to that which would be established by real observers evaluating the filters.