Method and apparatus for adjusting the correction levels in a se

Details Method and apparatus for adjusting the correction levels in a se Method and apparatus for adjusting the correction levels in a se

1977-05-31

1979-06-26

Hix, L. T.

Photocopying

Projection printing and copying cameras

Multicolor picture

355 77, 355 88, G03B 2778

Patent

active

041591747

ABSTRACT:
In a settable matrix photographic color printer, Neutral, Green-chromaticity, and Illuminant-chromaticity correction levels and associated color rotations are adjusted by: transforming the printer correction matrix from a Red, Green, Blue coordinate system to a Neutral, Green-chromaticity, Illuminant-chromaticity coordinate system whereby the diagonal elements of the transformed matrix represent the Neutral, Green-chromaticity, and Illuminant-chromaticity correction levels, and the off-diagonal elements of the matrix represent color rotations; changing the value of the elements of the transformed matrix as desired; and transforming the thus adjusted matrix back into the Red, Green, Blue color coordinate system.

REFERENCES:
patent: 3120782 (1964-02-01), Goddard et al.
patent: 3502410 (1970-03-01), King et al.
patent: 3588827 (1971-06-01), Van Roessel
SPSE Handbook of Photographic Science and Engineering, Wiley and Sons, 1973, pp. 461-468.
Journal of the Society of Motion Picture and Television Engineers, vol. 65, pp. 205-215, 1956.

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