Color conversion method and profile generation method

摘要

A tincture adjustment value used to adjust a monochrome signal to a tincture desired by a user is set, and a tincture conversion table and chromaticity line table are generated based on that tincture adjustment value and the profile of an image output apparatus. Using the generated tables, a lightness signal L* corresponding to an input monochrome signal is converted into a distance signal l on a chromaticity line, and the distance signal l is converted into a chromaticity signal (a*, b*). The lightness signal L* and chromaticity signal (a*, b*) are converted into a color signal of the image output apparatus.

主权项

1. A color process method comprising:
setting a gray chromaticity point for converting a black and white signal into a monochrome signal having a chromatic tincture, the gray chromaticity point being set by designating a color using a two-dimensional color map in which color thereof changes in both of the two dimensions; and converting the black and white signal into the monochrome signal having the chromatic tincture wherein a gray chromaticity point of the monochrome signal having the chromatic tincture matches the set gray chromaticity point, wherein, in setting the gray chromaticity point, the designated color is identical to a color corresponding to the set gray chromaticity point, and the set gray chromaticity point controls a color on a gray line in a color plane between a black point of the monochrome signal and the set gray chromaticity point.