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AssigneeSeiko Epson Corporation
InventorKenji Fukasawa
Estimating the term…
In the present invention, in order to perform black printing in a color space for printing comprising a plurality of approximately equivalent element colors, such as CMY, a CPU system 100 multiplies an undercolor amount, CMYmin, which is a common minimum component in the plurality of element colors, by the predetermined generation ratio BGR, to generate a black color component. In this case, the generation ratio BGR of the black color component is made smaller as the data before conversion becomes brighter, whereby the generation amount Kout of the black color component is small for the brighter color if the undercolor amount CMYmin is the same. When the printing operation is performed with reference to a color conversion table for printing obtained in this way, dot corresponding to black color component is unremarkable.
A printing data generating method to generate printing data for printing an individual color with at least cyan ink, magenta ink, yellow ink, and black ink, comprising performing a process of under color removal which generates a black color amount from a minimum amount of cyan ink, magenta ink, and yellow ink, the under color removal process generating the black color amount according to the minimum amount of cyan ink, magenta ink, and yellow ink, and further according to a ratio multiplied with the minimum amount, wherein the ratio is determined to be a smaller value when a brightness of the individual color is brighter, and the ratio is determined to be a greater value when the brightness of the individual color is darker.
A printing data generating apparatus to generate printing data for printing an individual color with at least cyan ink, magenta ink, yellow ink, and black ink, the generating apparatus performing a process of under color removal which generates a black color amount from the minimum amount of cyan ink, magenta ink, and yellow ink, the apparatus comprising:
A computer readable medium having a printing data generating program adapted to enable a computer to generate printing data for printing an individual color with at least cyan ink, magenta ink, yellow ink, and black ink, the generating of the printing data including a process of under color removal which generates a black color amount from the minimum amount of cyan ink, magenta ink, and yellow ink, the program enabling the computer to perform the steps of:
Dependencies are inferred from the claim text.