Color smooth error diffusion

Details Color smooth error diffusion Color smooth error diffusion

2005-07-19

2005-07-19

Johns, Andrew W. (Department: 2621)

Image analysis

Color image processing

C358S003030

Reexamination Certificate

active

06920243

ABSTRACT:
Embodiments of the present invention include a method for generating a halftone image. This method comprises the steps of choosing a set of allowed colors, processing a color value, quantizing color value, and outputting a halftone pixel according to quantizing step. In one embodiment, a look up table is utilized to provide significant speedup over conventional implementations, especially in when implemented in software. The result is high quality imaging with excellent color smoothness and sharpness.

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