Color reproducing method and apparatus for converting a color space data into another color space data

摘要

Color reproducing ranges of a CRT and a printer are divided to a plurality of sector areas which extend radially from a predetermined center point on an achromatic color axis (L* axis). For each sector area, a number of maximum distances of the color reproducing ranges of the CRT and the printer are measured from the predetermined center point. This maximum distance data are used to calculate a compression or expansion ratio for compressing the color reproducing range of the CRT into the color reproducing range of the printer, or vice-versa, the color reproducing range of the printer can be expanded into the color reproducing range of the CRT. With this compression or expansion ratio, the color space data of the CRT is compressed or expanded into the color reproducing range of the printer toward or away from the predetermined center point. Thus, it is possible to convert the color reproducing ranges of the CRT to that of the printer without losing a balance of luminosity and chroma.