Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1976-06-08
1978-02-21
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358 78, 358 80, 358296, 358302, H04N 140
Patent
active
040756629
ABSTRACT:
A method of calibrating a reproduction apparatus having a sensor device for generating sensor signals by optically scanning a picture original and a recording device controlled by recording signals for recording the picture original on a film, comprising the steps: generating a set of first signals for said recording device to produce a sample gray scale on the film having a predetermined first range of gray scale values; generating and storing a set of second signals corresponding respectively to said first signals; generating a set of third signals corresponding substantially to the gray scale values of said sample recorded gray scale; correlating said third signals to said first signals; generating a set of fourth signals representing a predetermined second range of gray scale values of a reference gray scale; substantially correlating a first group of at least some of said fourth signals to a second group of at least some of said third signals for obtaining said second signals; and storing said second signals in a storage device having addresses corresponding to the fourth signals of said first group, whereby a substantially generated sensor signal for a given gray scale value by the picture original can be used to select a recording signal from a stored second signal of said second group by a correlated fourth signal suitable for obtaining a substantially duplicate gray scale value.
The invention also relates to a system for calibrating the reproduction apparatus.
REFERENCES:
patent: 3800079 (1974-03-01), McNeil
patent: 3869698 (1975-03-01), Trost
patent: 3890596 (1975-06-01), Beun
patent: 3894217 (1975-07-01), Ebukuro
patent: 3916098 (1975-10-01), Vandling
patent: 3922546 (1975-11-01), Livesay
patent: 3922711 (1975-11-01), Sasabe
Britton Howard W.
Dr. -Ing. Rudolf Hell GmbH
Marmorek Ernest F.
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