0779736-A2 is referenced by 91 patents and cites 5 patents.

In a three-dimensional LUT for color conversion, the values of converted color component data C', M', and Y' are varied for a specific combination of the values of color component data C, M, and Y representing white, and the values of converted data are then changed for other combinations accompanied by the variation with respect to the specific combination. Referring to Fig. 1B, a concrete procedure first calculates variations of the values of color component data C', M', and Y' at steps S20, and then selects combinations of the values of color component data C, M, and Y for which the values of color component data C', M', and Y' are not changed, among a plurality of combinations of the values of color component data C, M, and Y at step S22.; For colors between white and cyan, magenta, yellow or black, the variations of the values of color component data C', M', and Y' are set to decrease in an increase in distance from a point corresponding to white in a three-dimensional color space at step S24. The procedure then leads Laplace's Equation including the variations and the values of color component data C, M, and Y as variables at step S26, and solves the Laplace's Equation to determine the variations of the values of color component data C', M', and Y' for each combination of the values of color component data C, M, and Y at step S28. This procedure enables the contents of the three-dimensional LUT for color conversion to be changed readily within a short time.

Title
Data conversion table changing
Application Number
EP19960118765 19961122
Publication Number
0779736 (A2)
Application Date
November 22, 1996
Publication Date
June 18, 1997
Inventor
Matsumura Akira
JP
Assignee
Dainippon Screen Mfg
JP
IPC
H04N 01/60
H04N 01/60
H04N 01/46
G06T 01/20
H04N 01/60
H04N 01/46
G06T 01/20
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