Image processing device

Details Image processing device Image processing device

1988-12-27

1989-09-12

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358298, 3582614, 358464, 358456, H04N 140

Patent

active

048665339

ABSTRACT:
A binary or multi-level digital encoding device capable of digital encoding of image signal with plural sets of threshold levels through a simple and compact circuit. The plural sets of threshold levels are stored in a memory and selected according to the level of the image signal representing image density.

REFERENCES:
patent: 3622698 (1971-11-01), Richeson et al.
patent: 4138693 (1979-02-01), Iizuka
patent: 4402015 (1983-08-01), Yamada
patent: 4495522 (1985-01-01), Matsunawa et al.
patent: 4517605 (1985-05-01), Yokomizo
patent: 4520395 (1985-05-01), Abe
patent: 4534059 (1985-08-01), Yamada
patent: 4663662 (1987-05-01), Sekizawa

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