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:
Nov. 13, 2007
Filed:
Jan. 15, 2003
Lalit K. Mestha, Fairport, NY (US);
Steve Bolte, Rochester, NY (US);
Eli Saber, Webster, NY (US);
Shawn Updegraff, Fairport, NY (US);
Lalit K. Mestha, Fairport, NY (US);
Steve Bolte, Rochester, NY (US);
Eli Saber, Webster, NY (US);
Shawn Updegraff, Fairport, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
Tone reproduction curves for calibrating a marking system are obtained using a test pattern with a plurality of patches, preferably a plurality of first test patches extending in a first direction and at least one second test patch extending in a second direction crossing the first direction. Reflectance values are obtained from the first and second test patches. A set of gray balanced tone reproduction curves are obtained based on the reflectance values of the first test patches, and a set of spatial gray balanced tone reproduction curves are obtained based on the reflectance values of the second test patches.