Variable frequency half-tone imaging apparatus

Details Variable frequency half-tone imaging apparatus Variable frequency half-tone imaging apparatus

1977-03-07

1978-12-19

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358283, H04N 104, H04N 122

Patent

active

041308417

ABSTRACT:
An apparatus in which an original document is reproduced. The original document is scanned to determine the tonal graduations thereof and a signal generated indicative thereof. An image of the original document having a plurality of half-tone dot spacial frequencies is formed. Each half-tone dot spacial frequency is selected from a plurality of selected spacial frequencies corresponding to a pre-determined signal range. In this manner, the selected half-tone dot spacial frequencies are a function of the signal indicating the tone graduations of the original document.

REFERENCES:
patent: 3294896 (1966-12-01), Young
patent: 3549798 (1970-12-01), Young
patent: 3739084 (1973-06-01), Heinrich

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