BLACK COLOR GENERATION AMOUNT DETERMINING METHOD IN BLACK PRINTING, A BLACK COLOR GENERATION AMOUNT DETERMINING APPARATUS IN BLACK PRINTING, A MEDIA HAVING RECORDED THEREON A BLACK COLOR GENERATION AMOUNT DETERMINING PROGRAM IN BLACK PRINTING

摘要

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.