| 摘要 |
A method and apparatus for managing color data in a predetermined color space by using a pallet converting mechanism, in which a pallet management table can be efficiently registered and updated. An entry number accessing a table entry in the pallet management table is formed by combining the components of the color data. Table data, obtained by combining remaining components of the color data which are not used for the formation of the entry number, is stored into the table entry identified by the entry number. There is also the conversion of color data to pallet data, which corresponds to entry numbers, and the reverse conversion to reconstruct the original color data from pallet data and entry number information. Validity information indicative of the validity of the table entry is also registered into the table entry of the pallet management table, so that an available table entry at the time of new registration can be immediately found out.
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