Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2006-09-19
2006-09-19
Lee, Thomas D. (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S519000, C358S534000
Reexamination Certificate
active
07110144
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.
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Cheng Shirley
Gwaltney Mark A.
Loce Robert P.
Maltz Martin S.
Purdum Connie F.
Lee Thomas D.
Nixon & Peabody LLP
Xerox Corporation
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