Efficient under color removal

Details Efficient under color removal Efficient under color removal

2007-04-10

2007-04-10

Nguyen, Madeleine A V (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S523000, C382S167000

Reexamination Certificate

active

10662581

ABSTRACT:
A method of performing color space conversion and under color removal. Pixelated data is first resampled (102) to an efficient word size—typically 8-bits wide. The RGB color format data words are then subtracted from a maximum intensity to yield CMY color format data words. The minimum value of the three intensity words for each pixel is determined and used as an initial black value. A scaled version of the initial black value is then subtracted from each of the four CMYK intensity words (104). The resulting CMYK values are then limited to a range bounded by the maximum and minimum producible intensities for each color.

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