BASE COLOR REMOVAL PROCESSOR

PURPOSE:To highly precisely improve the color reproducibility of a color with high chroma while holding an achromatic color in a black plate by making the coefficients of a base color removal processing different according to a chrominance signal to be processed. CONSTITUTION:A color correction proc...

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Bibliographic Details
Main Authors IMAO KAORU, SAITO TAKUSHI
Format Patent
LanguageEnglish
Published 21.04.1995
Edition6
Subjects
CORRECTION OF TYPOGRAPHICAL ERRORS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME
LINING MACHINES
PERFORMING OPERATIONS
PICTORIAL COMMUNICATION, e.g. TELEVISION
PRINTING
SELECTIVE PRINTING MECHANISMS
STAMPS
TRANSPORTING
TYPEWRITERS
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Summary:PURPOSE:To highly precisely improve the color reproducibility of a color with high chroma while holding an achromatic color in a black plate by making the coefficients of a base color removal processing different according to a chrominance signal to be processed. CONSTITUTION:A color correction processing part 2 converts inputted R, G, and B signals into Y, M, and C signals in complementary colors. An ink generation processing part 3 generates an ink print K signal from the output signals Y, M, and C of the color correction processing part 2, in regard to output signals Y, M, C for example, Y signal, an under color removal processing part 4 outputs an under color removed signal Y' by using a black plate signal K, and Y signal as an input signal. Y'=(Y-K)/Uy(K), M'=(M-K)/Um(K), and C'=(C-K)/Uc(K) are used as conversion expressions. The Uy(K), Um(K), and Uc(K) are different values, and the values are obtained by table conversion by using the ink print K signal as a parameter.
Bibliography:Application Number: JP19930244606