| 摘要 |
An image processing apparatus for tone conversion of a color image having s bit (s is an integer which is equal to or larger than 3) to a color image having d bit (d is an integer which is equal to or smaller than (s−2)) comprises: a conversion table generation unit configured to generate a conversion table, which varies in dependence on a tone value of the s bit, and has dispersion of which level varies in accordance with chroma and luminance of the color image; and a tone conversion unit configured to convert, before image compression or image file storage is performed and after color space conversion is performed, the color image having s bit to the color image having d bit using the conversion table.
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