Pel resolution addressing conversion

Details Pel resolution addressing conversion Pel resolution addressing conversion

1989-08-04

1990-12-04

Coles, Sr., Edward L.

Optics: image projectors

Plural projection paths with single light source

353463, H04M 140

Patent

active

049757857

ABSTRACT:
Enhancement of text characters when converted to a higher resolution without degrading imbedded halftone images. Enhancement at the higher resolution is determined by comparing predetermined patterns to individual lower resolution pels and surrounding pels. The predetermined patterns are selected as occurring in text data and not in half-tone images according to the rules described.

REFERENCES:
patent: 4403257 (1983-09-01), Hsieh
patent: 4437122 (1984-03-01), Walsh et al.
patent: 4694342 (1987-09-01), Klees

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