Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1996-05-22
1998-06-09
Frahm, Eric
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358298, 358518, H04N 146, H04N 140
Patent
active
057643873
ABSTRACT:
A color correction device which minimizes color differences throughout an area to be subjected to color reproduction includes a dynamic range conversion circuit for the colors cyan, magenta, and yellow, a separation circuit for separating the colors into high order bits and low order bits, and a CMY table reference for obtaining CMY table values corresponding to the high order bits. An interpolation circuit performs an interpolation process based on the low order bits and the CMY table values. A K-table reference obtains four K-table values corresponding to black, and a CMY correction circuit corrects for the values of cyan, magenta, and yellow based on three interpolated data from the interpolation circuit and three data obtained by the K-table reference.
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patent: 4992861 (1991-02-01), D'Errico
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patent: 5475510 (1995-12-01), Ikegami
patent: 5479272 (1995-12-01), Saito
patent: 5666437 (1997-09-01), Vandran, Jr.
Frahm Eric
Seiko Instruments Information Devices Inc.
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