Tone reproduction method and apparatus

Details Tone reproduction method and apparatus Tone reproduction method and apparatus

1985-05-14

1987-10-20

Goldberg, E. A.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358296, 358283, H04N 130, H04N 140

Patent

active

047018119

ABSTRACT:
In a half-tone recording method and apparatus, half-tone expressing units, each consisting of several recording picture elements, express gradations of density in a document. The recording picture elements in the units are assigned various half-tone levels with the half tone level of at least one of the recording picture elements both increasing and decreasing as the gradation of the half-tone expressing unit increases.

REFERENCES:
patent: 4389712 (1983-06-01), Frattarola et al.
patent: 4412226 (1983-10-01), Yoshida
patent: 4491875 (1985-01-01), Kawamura

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