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:
Oct. 20, 2015
Filed:
Apr. 01, 2011
Thomas A. Lianza, Bedford, NH (US);
Andrew Masia, Newburyport, MA (US);
Wang Long Zhou, Andover, MA (US);
Richard Federico, Reading, MA (US);
Beat Frick, Buchs, CH;
Thomas A. Lianza, Bedford, NH (US);
Andrew Masia, Newburyport, MA (US);
Wang Long Zhou, Andover, MA (US);
Richard Federico, Reading, MA (US);
Beat Frick, Buchs, CH;
X-Rite Switzerland GmbH, Regensdorf, CH;
Abstract
In a calibrating method for a filter color measuring device that includes at least three color channels, a calibration matrix for transforming output signals of the color channels into tristimulus color values is formed. The calibration is performed spectrally, wherein the spectral sensitivities of the color channels of the color measuring device and the spectral emission properties of typical light sources are measured and stored, and the calibration matrix is calculated from the spectral sensitivities and the spectral emission properties of the light sources and the spectral evaluation functions of the standard observer, e.g., according to CIE 1931.