Image quality correcting system for use with an imaging apparatu

Details Image quality correcting system for use with an imaging apparatu Image quality correcting system for use with an imaging apparatu

1990-03-20

1991-11-26

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 32, 358 39, 358164, H04N 969

Patent

active

050687182

ABSTRACT:
An image quality correction circuit for use with an imaging apparatus which converts a luminance signal so that an intermediate portion of the signal between preset minimum and maximum values is extended. The invention also relates to a device where color difference signals are corrected in accordance with the same nonlinear characteristic utilized in the correction of the luminance signal.

REFERENCES:
patent: 3684825 (1972-08-01), Dischert et al.
patent: 3752905 (1973-08-01), Schneider
patent: 4152720 (1979-05-01), Fenton
patent: 4241362 (1980-12-01), Van der Valk
patent: 4305090 (1981-12-01), Hess et al.
patent: 4489349 (1984-12-01), Okada
patent: 4812903 (1989-03-01), Wagensonner et al.

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