05559604 is referenced by 19 patents and cites 6 patents.

Colorimetric values such as L*a*b* values are transformed into color separation values such as CMYK values dependent on the characteristics of a color output device by using a multilayered feedforward neural network. The neural network learns in advance the relationships between a multiplicity of colorimetric values under different illuminants and color separation values. When colorimetric values of a standard illuminant and one of the color temperature of an observational illuminant, the spectral distribution of the observational illuminant, and colorimetric values at the time of illumination by the observational illuminant are inputted to the neural network, color separation values corresponding to one of the color temperature of the observational illuminant, the spectral distribution of the observational illuminant, and the colorimetric values obtained when illumination is provided by the observational illuminant are outputted. Consequently, colorimetric values are transformed into color separation values such that the color reproduced under the observational illuminant will visually assume the same color as that under the standard illuminant.

Title
Color matching apparatus for reproducing the same color under different illuminants
Application Number
8/313470
Publication Number
5559604
Application Date
September 27, 1994
Publication Date
September 24, 1996
Inventor
Yoshifumi Arai
Tokyo
JP
Agent
Knobbe Martens Olson & Bear
Assignee
Toyo Ink Manufacturing
JP
IPC
G01N 21/27
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