Half tone reproducing process in facsimile

Details Half tone reproducing process in facsimile Half tone reproducing process in facsimile

1973-02-06

1977-01-04

Cardillo, Jr., Raymond F.

Facsimile and static presentation processing

Facsimile

Recording apparatus

178 6, 178 67R, H04N 138

Patent

active

040014924

ABSTRACT:
A half tone reproducing circuitry in a facsimile system characterized by circuitry for pulse number modulating the image signal of an image including half tone circuitry for eliminating those pulses from the pulse frequency modulated signal occurring during the white portion of the image signal and circuitry for on and off controlling an image recording device by the modulated signal thereby reproducing the half tone of the image.

REFERENCES:
patent: 2263986 (1941-11-01), Finch
patent: 2283415 (1942-05-01), Cox
patent: 3197558 (1965-07-01), Ernst
patent: 3564131 (1971-02-01), Herold et al.
patent: 3580995 (1971-05-01), Klensch
patent: 3613103 (1971-10-01), Harris
patent: 3751587 (1973-08-01), Insler et al.

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