Image processing apparatus

Details Image processing apparatus Image processing apparatus

1989-04-07

1990-11-06

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358452, 358462, 358464, 358 75, H04N 146, H04N 140

Patent

active

049690515

ABSTRACT:
An image processing apparatus has a function of enlarging or reducing an image which is processed by a certain magnification. A modulation transfer function (MTF) correction circuit is provided in the image processing apparatus and the correction quantity or filter characteristic of this MTF correction circuit is automatically changed depending on a change in the magnification.

REFERENCES:
patent: 4686580 (1987-08-01), Kato et al.
patent: 4742400 (1988-05-01), Tsuji
patent: 4827433 (1989-05-01), Kamen
patent: 4841337 (1989-06-01), Hiratsuka et al.

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