Digital copying apparatus

Details Digital copying apparatus Digital copying apparatus

1988-08-15

1989-07-25

Salce, Patrick R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358298, H04N 140

Patent

active

048519200

ABSTRACT:
A digital copying apparatus comprising a region discriminating circuit for processing electrical signals obtained from an image reading scanner and discriminating whether or not the original image is an intermediate tone image. The signals to be supplied to a printer being controlled depending on a signal from the region discriminating circuit, specifically, signals processed at the intermediate tone being selected if the region discriminating circuit detects the presence of the intermediate tone information, whereas signals subjected to a simple binarization are selected if the discriminating circuit detects the absence of the intermediate tone information.

REFERENCES:
patent: 4447830 (1985-05-01), Stoffel
patent: 4547811 (1985-10-01), Ochi et al.
patent: 4577235 (1986-03-01), Kannapell et al.
patent: 4663662 (1987-05-01), Sekizawa et al.
patent: 4707745 (1987-11-01), Sakano

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