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. 22, 2013
Filed:
Oct. 31, 2011
Guo-yau Lin, Fairport, NY (US);
James M. Sanchez, Rochester, NY (US);
Connie F. Purdum, Rochester, NY (US);
Adam E. Stein, Rochester, NY (US);
Mustapha Guesmia, West Henrietta, NY (US);
Guo-Yau Lin, Fairport, NY (US);
James M. Sanchez, Rochester, NY (US);
Connie F. Purdum, Rochester, NY (US);
Adam E. Stein, Rochester, NY (US);
Mustapha Guesmia, West Henrietta, NY (US);
Xerox Corporation, Norwalk, CT (US);
Abstract
Methods of performing print engine calibration create a color space conversion equation for a scanner of a class of printing devices, print test patches on a sheet, and scan the test patches using a scanner of the printing device to produce a scanned RGB value for each test patch. Such methods convert each scanned RGB value to an XYZ pseudo space using the color space conversion equation to produce XYZ values. These methods compare the XYZ values to second XYZ values of white paper to generate DeltaE curves for each of the test patches relative to white paper. The DeltaE curves are interpolated to form an equivalent aim curve. After the equivalent aim curve is determined, the methods periodically calibrate the same or an additional printing device that is within the class of printing devices using the color space conversion equation to produce second XYZ values.