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:
Sep. 19, 2006
Filed:
Sep. 05, 2001
Shirley Cheng, Webster, NY (US);
Mark A. Gwaltney, Fairport, NY (US);
Robert P. Loce, Webster, NY (US);
Martin S. Maltz, Rochester, NY (US);
Connie F. Purdum, Rochester, NY (US);
Shirley Cheng, Webster, NY (US);
Mark A. Gwaltney, Fairport, NY (US);
Robert P. Loce, Webster, NY (US);
Martin S. Maltz, Rochester, NY (US);
Connie F. Purdum, Rochester, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
Method, system and computer-readable medium containing instructions for performing halftone gamma correction in a printing environment to achieve and maintain high print quality. The system includes one or more subsystems, including a tone reproduction subsystem that creates one or more print calibration pages, each having a tone curve defining a relationship between a plurality of input color levels, output color levels and a level of measured darkness. A pixel adjustment subsystem associates each input color level with one of the output color levels based on a desired percentage change in the level of measured darkness. Further, a gamma correction system performs gamma correction on a selected tone curve of one of the print calibration pages by associating each input color level with one of the output color levels based on the desired percentage change in the level of measured darkness in a substantially flat region of the selected tone curve.