Method and apparatus for undercolor removal during page pipeline

Details Method and apparatus for undercolor removal during page pipeline Method and apparatus for undercolor removal during page pipeline

1998-05-05

2000-02-29

Nguyen, Madeleine

Facsimile and static presentation processing

Static presentation processing

Attribute control

358529, 382163, G06F 1500, G03F 308

Patent

active

060316306

ABSTRACT:
A method for undercolor removal (UCR) from a multi-color image represented by N color planes of non-black pixel image color values and replacement of removed undercolor by black values, includes the following steps. A corrected black color plane is obtained by replacing initial maximum black color values with black color values that are a Min function between the initial black color values and N-1 logically corresponding non-black pixel image color values. Page strip portions of the corrected black color plane are then revised so that each pixel black color value thereof is converted to a UCR value by deriving the Min function with logically corresponding, Nth color plane non-black pixel image color values. Next, logically corresponding UCR values for each page strip are subtracted from Nth color plane non-black pixel image color values and each page strip from the Nth color plane is passed to a print engine for rendering. Next, logically corresponding UCR values for each page strip are subtracted from the remaining ones of the N-1 color plane non-black pixel image color values. The N-1 color plane page strips are then fed to the print engine. The UCR values from the black color plane are then used for GCR.

REFERENCES:
patent: 4831409 (1989-05-01), Tatara et al.
patent: 5181068 (1993-01-01), Morikawa
patent: 5255084 (1993-10-01), Morikawa et al.
patent: 5315381 (1994-05-01), Yamashita et al.
patent: 5359437 (1994-10-01), Hibi
patent: 5838885 (1998-11-01), Shu et al.
patent: 5920645 (1999-07-01), Aida
patent: 5923821 (1999-07-01), Birnbaum et al.

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