Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1982-04-06
1984-12-04
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358283, 358302, H04N 124, H04N 140
Patent
active
044867883
ABSTRACT:
A method for producing a halftone plate from an original picture having a continuous tone directly, for use in a picture reproducing machine such as a color scanner and a color facsimile, wherein a reproduction picture is recorded on a photosensitive material by means of a plurality of exposure light beams which are independently modulated by picture signals obtained by scanning the original picture, wherein a halftone dot area is quantized into picture elements depending on a screen angle approximate to the desired screen angle, whose tangent value is a rational number, and the picture elements are indentified by address numbers in a predetermined order, wherein data for halftone dot area rates and forms of halftone dot patterns are stored in addresses of memories to be addressed by a common address, and then one of the memories is selected depending on the picture signals, and wherein the data is read out of the selected memory, and the exposure light beams are controlled by the read-out data.
REFERENCES:
patent: 4110796 (1978-08-01), Aughton
patent: 4342051 (1982-07-01), Suzuki
patent: 4365275 (1982-12-01), Berman
patent: 4413286 (1983-11-01), Boston
Britton Howard W.
Dainippon Screen Seizo Kabushiki Kaisha
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