Image analysis – Color image processing
Patent
1995-12-27
1998-06-23
Boudreau, Leo
Image analysis
Color image processing
382191, 382156, 382158, 382167, 358518, G06K 900
Patent
active
057713111
ABSTRACT:
Color separation values such as CMYK values from an input device are transformed into characteristic parameter values by a first transforming device having a neural network which has undergone learning in advance in such a manner as to output characteristic parameter values obtained by multivariate analysis of spectral distributions which correspond to the color separation values and are illuminant-independent. These characteristic parameter values are subjected to a linear transformation by a second transforming device, the linear transformation having a constraint that calorimetric values under a specified illuminant are to be equal or another similar constraint, by using mean vectors and eigenvectors (principal component vectors) of predetermined spectral reflectances stored in a storage device. The transformed characteristic parameter values are transformed into color separation values of a target color reproduction device by a third transforming device having a neural network which has undergone learning in advance.
REFERENCES:
patent: 5109275 (1992-04-01), Naka et al.
patent: 5506696 (1996-04-01), Nakano
Boudreau Leo
Toyo Ink Manufacturing Co. Ltd.
Tran Phuoc
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