Color image reproduction apparatus having a least squares look-u

Details Color image reproduction apparatus having a least squares look-u Color image reproduction apparatus having a least squares look-u

1989-04-04

1990-07-10

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 78, 358 75, G03F 308

Patent

active

049410393

ABSTRACT:
Color image reproduction apparatus, including a video monitor and a computer-based workstation, provides for reading a color image 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. Output color image values stored in each LUT are computed off-line by means of a least squares algorithm applied to an input data set augmented by the second derivative of the function represented by the data set.

REFERENCES:
patent: 4346402 (1982-08-01), Pugsley
patent: 4500919 (1985-02-01), Schreiber
patent: 4819193 (1989-04-01), Imao

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