Color image reproduction apparatus having a digitally operated l

Details Color image reproduction apparatus having a digitally operated l Color image reproduction apparatus having a digitally operated l

1988-10-18

1991-02-12

Coles, Sr., Edward L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 80, H04N 146

Patent

active

049928619

ABSTRACT:
Color image reproduction apparatus, including a video monitor and a computer-based workstation, provides for modifying an original color image read from an input film and for writing a reproduced image on an output film. A plurality of digitally operated look-up tables (LUTs), associated with the workstation, serve for transforming original imaging data to a common color space (CIELUV L* u* v*) and for transforming reproduced imaging data to different use-dependent RGB color spaces, e.g. video monitor, output film, etc. Color image values stored in each LUT are altered from exact color image values by means of a least squares algorithm to provide an average error of zero--an unbiased error--for linearly interpolated values derived from each LUT.

REFERENCES:
patent: 4275413 (1981-05-01), Sakamoto
patent: 4500919 (1985-02-01), Schreiber
patent: 4654720 (1987-03-01), Tozawa
patent: 4819193 (1989-04-01), Imao

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