Exposure control process and photographic color copying apparatu

Details Exposure control process and photographic color copying apparatu Exposure control process and photographic color copying apparatu

1989-09-22

1991-05-14

Hayes, Monroe H.

Photocopying

Projection printing and copying cameras

Multicolor picture

355 77, G03B 2780

Patent

active

050160435

ABSTRACT:
The copy originals are scanned photoelectrically by regions and three color densities are determined for each scanning regions. Additionally, using a high resolution scanning system, a detail contrast parameter describing the detail contrast in the scanning region is determined. The detail contrast parameters are evaluated together with the color densities of the scanning regions for the determination of the copy light quantities. In particular, in the correction of densities, scanning regions with higher detail contrasts are considered stronger than those with lower density contrasts, while color corrections are carried out in exactly the opposite manner.

REFERENCES:
patent: 3369449 (1968-02-01), Klauss et al.
patent: 3542471 (1970-11-01), Dubay
patent: 3942154 (1976-03-01), Akami et al.
patent: 4092067 (1978-05-01), Grossman
patent: 4101216 (1978-07-01), Grossman
patent: 4101217 (1978-07-01), Fergg et al.
patent: 4150894 (1979-04-01), Meyer et al.
patent: 4166588 (1979-09-01), Krebbiel et al.
patent: 4270861 (1981-06-01), Beckman
patent: 4279505 (1981-07-01), Ursprung et al.
patent: 4344708 (1982-08-01), Tokuda
patent: 4416539 (1983-11-01), Terashita
patent: 4422752 (1983-12-01), Thurm et al.
patent: 4566786 (1986-01-01), Furisch et al.
patent: 4589766 (1986-05-01), Furisch et al.
patent: 4610537 (1986-09-01), Matsumoto
patent: 4666306 (1987-05-01), Matsumoto
patent: 4668082 (1987-05-01), Terashita et al.
patent: 4676628 (1987-06-01), Asbury, III
patent: 4709259 (1987-11-01), Suzuki
patent: 4757351 (1988-07-01), Birgmeir
patent: 4779987 (1988-10-01), Umemoto et al.
patent: 4931831 (1990-06-01), Knecht et al.
patent: 4951084 (1990-08-01), von Stein et al.
PCT Application No. WO 83/02869, Watt.
"The Reproduction of Color", p. 284, by R.W.G. Hunt.
Publication to van Trees entitled "Detection, Estimation, and Modulation Theory", Part I Detection, Estimation and Linear Modulation Theory, p. 232 of the 1987 CCD Data Book.

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