Dynamic generation of linearized halftone matrix

Details Dynamic generation of linearized halftone matrix Dynamic generation of linearized halftone matrix

2007-01-02

2007-01-02

Lee, Thomas D. (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003160, C358S535000, C358S536000

Reexamination Certificate

active

09915417

ABSTRACT:
There is disclosed a method of dynamic generation of a linearized halftone matrix from a high bit resolution halftone matrix, for use in a printer device, for example a domestic or office printer device or a commercial high resolution printer device. A high bit resolution halftone threshold matrix is converted into a vector format (700). A tone correction function is applied by selecting a variable number of index values, each index value representing a threshold level. A tone corrected two-dimensional 8 bit threshold level matrix, is then applied to a corresponding print image plane comprising a plurality of pixels to obtain a two dimensional print data for each of a plurality of colors of an image. The print data is printed as a plurality of dots by a print head to form a printed image using a halftoning method.

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patent: 6831756 (2004-12-01), Ushiroda
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European Search Report of Application No. EP 00116343, dated Oct. 1, 2001 (3 pages).

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