Table based fast error diffusion halftoning technique

Details Table based fast error diffusion halftoning technique Table based fast error diffusion halftoning technique

1997-10-30

2000-05-02

Lef, Thomas D.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358502, H04N 146

Patent

active

060579331

ABSTRACT:
In an error diffusion process for an inkjet printer, a look-up table is indexed by an input color tone, with entries for base output level, base level error term, threshold error term, and whatever other data may be relevant. This table may be embodied in a conventional memory or software code. The base output level corresponds to the number of ink drops to be ejected by the inkjet print for particular ink colors, the base level error term reflects the error between the input and output of the look-up table, and the threshold error term is subtracted from the total error for the pixel if the base output level is incremented by one.

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Hewlett-Packard Patent Application 08/812,777, 3/06/97, Fast Error Diffusion Alogrithm.
Hewlett-Packard Patent Application 08/880,475, 6/23/97 Correlating and Magenta Planes For Error Diffusion Halftoning.

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