Method of recording a halftone picture electronically

Details Method of recording a halftone picture electronically Method of recording a halftone picture electronically

1982-12-06

1985-10-15

Tarcza, Thomas H.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358 75, 358283, 358302, H04N 122

Patent

active

045478147

ABSTRACT:
A method for recording a halftone picture electronically, for use in a halftone picture reproducing machine for plate making is disclosed. A plurality of halftone data corresponding to a plurality of picture elements of a vignette halftone dot is simultaneously read out of a memory in which the vignette halftone dot quantized is stored, in synchronization with picture signals, and the halftone data and the picture signals are added to obtain recording signals, and according to the recording signals a plurality of light beams for exposure are controlled to be open or close, thereby recording a halftone picture. The number of the light beams included in a recording scanning width is selected depending on a screen pitch, and then the selected light beams are controlled according to the recording signals.

REFERENCES:
patent: 4486788 (1984-12-01), Yamada

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