Patterning and dot gain improvement for vector error diffusion

Details Patterning and dot gain improvement for vector error diffusion Patterning and dot gain improvement for vector error diffusion

2006-08-15

2006-08-15

Tung, Kee M. (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Attributes

C345S602000, C382S252000, C382S253000

Reexamination Certificate

active

07091987

ABSTRACT:
A method for processing color-image pixel-data for outputting by a multi-bit (N) color-image output device including the steps of (a) characterizing color-image pixels into N successive, associated scan lines of pixels, which lines are bridged, effectively for processing purposes, by successive N×N pixel groups distributed along the associated scan lines, and (b) for each such pixel group, applying processing to the pixels in the group, including vector error diffusion processing, in a pixel-by-pixel and scan-line-by-scan-line manner employing, cyclically, N different color palettes, one each for the different scan lines—one of which palettes is bi-tonal, and other(s) of which is (are) of a higher bit level up to the level N.

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