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:
Jul. 13, 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;
Centre National de la Recherche Scientifique-CNRS, Paris, FR;
Abstract
A method of improving an initial color filter comprises a numerical generation of sinusoidal spectra. Two steps of selecting said spectra are then executed. The first selection is carried out according to a criterion of colorimetric similitude with respect to the initial filter. The second selection is carried out according to the capacity of dummy filters corresponding to each spectrum to restore hues in a natural manner. To do this, observations of samples of hues through each dummy filter are simulated numerically, using a color appearance model to take account of a visual perception of a human observer. In this way, an improved filter is determined, which has a color close to that of the initial filter and which affords a natural rendition of hues.