| 摘要 |
A method of color transformation is based on non-separable tiling of a color space. Non-separable tiling allows fine granularity where it is desired and coarse granularity where it is tolerable. Non-separable tiling of the color space provides improved transformation quality for a given lookup table size. Color space is recursively tiled and addressed. Transformation information from the tiles is stored in a database. Database searching techniques are used to speed information access. For example, a hashing function and hashing table are employed to store and retrieve transformation information. An image processor operative to perform the method includes a database index generator and a database of transformation information. For example, the database index generator generates a hashing key from pixel information and uses a hashing function to generate a database cell index. The image processor includes an output device. The output device is, for example, a xerographic printer.
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