Method and apparatus for minimizing artifacts in images produced

Details Method and apparatus for minimizing artifacts in images produced Method and apparatus for minimizing artifacts in images produced

1994-07-01

1997-11-25

Bost, Dwayne

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358447, 358448, 358455, 358474, G06K 1500, H04N 140

Patent

active

056921098

ABSTRACT:
An image preprocessing method and apparatus processes image data line-by-line using an error diffusion process to generate a halftoned image. The method and apparatus varies the processing direction from line-to-line to minimize the presence of worm-type artifacts in a halftoned image where the processing direction of each line in the image is dependent on the content of the image. More particularly, the processing direction of each line in the image is dependent upon the grayscale value and/or the quantization error associated with one or more pixels of a previously processed line in the image.

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