| 摘要 |
A method for color selection is proposed in which interchangeability between color palettes of a predetermined number of colors for color expressions of a color image and extended color palettes with an increased number of colors is maintained. A color space is divided into +E,uns n+EE regions D1 . . . Dn corresponding to the number of colors +E,uns n+EE of pre-extension color palettes for corresponding to +E,uns n+EE palette number groups of the extended color palettes. Each of these regions D1 . . . Dn is subdivided into +E,uns m+EE sub-regions D1(1) to D1(m), . . . , Dn(1) to Dn(m) corresponding to an extended color number +E,uns mn+EE for association with +E,uns mn+EE palette numbers of the extended color palettes.
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