Photocopying – Projection printing and copying cameras – Multicolor picture
Patent
1991-09-05
1992-06-02
Hix, L. T.
Photocopying
Projection printing and copying cameras
Multicolor picture
355 77, G03B 2780
Patent
active
051191253
ABSTRACT:
In a photographic copy process the copy master is scanned in intervals by a source of measuring light. The measuring light is spectrally split, detected and converted into electrical measuring signals. The n spectral measuring signals are converted into n spectral density values, compared with neutral densities and n spectral density differences formed. In a data compression the n spectral density differences are converted by an orthogonal transformation to m<n transformation coefficients. The transformation coefficients are analyzed in a color and density correction routine and deviations computed. From the deviations the copy light quantities and exposure corrections adjusted to the copy material are determined. The photographic copies are produced by the exposure values determined.
REFERENCES:
patent: 4154523 (1974-05-01), Rising et al.
patent: 4159174 (1979-06-01), Rising
patent: 4873546 (1989-10-01), Zahn et al.
patent: 4884102 (1989-11-01), Terashita
patent: 4922273 (1990-01-01), Yonekawa et al.
patent: 4951084 (1990-08-01), von Stein et al.
patent: 5016043 (1991-05-01), Kraft et al.
patent: 5036351 (1941-07-01), Frick et al.
Gretag Systems, Inc.
Hix L. T,.
Rutledge D.
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