Color image reproduction apparatus having a least squares look-up table augmented by smoothing
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United States of America Patent
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Jul 10, 1990
Grant Date -
N/A
app pub date -
Apr 4, 1989
filing date -
Apr 4, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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Cited Art Landscape
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