Electronic screening

Facsimile and static presentation processing – Facsimile – Recording apparatus

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Details

358 75, H04N 140, H04N 146

Patent

active

041158164

ABSTRACT:
A continuous-tone image, which can be in full color, is scanned to produce color-separation images in halftone dots. Edges of features in the scanned image are sensed, and the positions and shapes of the halftone dots that define corresponding edges in the halftone reproductions are adjusted so that they conform better to the feature edges. This reduces or eliminates the apparent serrations or roughness of feature edges in the halftone reproductions otherwise caused by misalignment of the halftone dots with the feature edges and improves image definition.

REFERENCES:
patent: 3646262 (1972-02-01), Moe
patent: 3887939 (1975-06-01), Hunt
patent: 3956587 (1976-05-01), Nelson
patent: 3983319 (1976-09-01), Moe et al.

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