Method for reducing artifacts in error diffused images

Details Method for reducing artifacts in error diffused images Method for reducing artifacts in error diffused images

1988-08-29

1990-10-09

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 27, 358167, 358166, 358463, H04N 521, H04N 140

Patent

active

049625420

ABSTRACT:
A method for use in a recursive spatial filter which interchanges the value of a control pixel with that of the value of a predetermined one of the surrounding pixels in a pixel mask when a specific image pattern occurs in the digital image. The use of such a method eliminates certain highly visible grain patterns from the halftoned digital image while preserving the average gray level.

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patent: 4625330 (1986-11-01), Higgins
patent: 4694342 (1987-09-01), Klees

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