Patterning and dot gain improvement for vector error diffusion
First Claim
1. A method for processing color-image pixel-data for outputting by a multi-bit (N) color-image output device comprisingcharacterizing color-image pixels into N successive, associated scan lines of pixels,with respect to the result of said characterizing, effectively bridging the N associated scan lines to create for processing purposes, successive N×
- N pixel groups distributed along these lines, andfor 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, and 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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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.
12 Citations
6 Claims
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1. A method for processing color-image pixel-data for outputting by a multi-bit (N) color-image output device comprising
characterizing color-image pixels into N successive, associated scan lines of pixels, with respect to the result of said characterizing, effectively bridging the N associated scan lines to create for processing purposes, successive N× - N pixel groups distributed along these lines, and
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, and one of which palettes is bi-tonal, and other(s) of which is (are) of a higher bit level up to the level N. - View Dependent Claims (2, 3, 4, 5, 6)
- N pixel groups distributed along these lines, and
Specification