Picture signal pre-processing method for a picture reproducing m

Details Picture signal pre-processing method for a picture reproducing m Picture signal pre-processing method for a picture reproducing m

1981-01-09

1983-08-30

Britton, Howard

Facsimile and static presentation processing

Facsimile

Recording apparatus

358 80, 358284, H04N 140

Patent

active

044020155

ABSTRACT:
A method for pre-processing a picture signal prior to an operational circuit of a picture reproducing machine such as a color scanner and a color facsimile, wherein an original picture is scanned photoelectrically to obtain the picture signal, wherein first conversion characteristics data stored in a memory are read out by addressing addresses of the memory by the picture signal, and then are changed by second conversion characteristics data depending on a desired reproducible density range of the original picture.

REFERENCES:
patent: 3729584 (1973-04-01), de Vos
patent: 4058828 (1977-11-01), Ladd
patent: 4250522 (1981-02-01), Seki
patent: 4305093 (1981-12-01), Nasu
patent: 4307415 (1981-12-01), Sundermeyer
patent: 4346409 (1982-08-01), Ishida

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