Color image processing

Details Color image processing Color image processing

1996-06-20

1997-06-03

Boudreau, Leo

Image analysis

Color image processing

Color correction

382156, 382158, 358518, 358519, G06K 900

Patent

active

056362900

ABSTRACT:
A first nonlinear conversion section converts input color signals of a kind that is one of plural, different kinds to L*a*b* signals. A second nonlinear conversion section converts the L*a*b* signals to image recording signals of four colors including black. The first nonlinear conversion section includes an input judgment device for judging the kind of input color signals, a weight memory for storing weights for the respective kinds of color signals, and a nonlinear conversion circuit. The weights corresponding to the kind of input color signals identified by the input judgment device are read from the weight memory and set in the nonlinear conversion circuit. The first nonlinear conversion section further has a learning device to accommodate color signals whose conversion relationship with the L*a*b* signals has not been defined.

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patent: 4740833 (1988-04-01), Shiota et al.
patent: 5032904 (1991-07-01), Murai et al.
patent: 5105267 (1992-04-01), Hayashi
patent: 5162899 (1992-11-01), Naka et al.
patent: 5386496 (1995-01-01), Arai et al.

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