Image quantization

Vector quantization:

In color images, triples of component sample values are mapped onto other triples of component sample values according to a certain rule.

Example: color quantization or palettization

All possible triples of component sample values are mapped onto a certain set of allowed colors, usually very limited (256 for example). This limited set of allowed colors is called a palette. This type of color representation is called indexed color, as the colors from the palette may be identified by integer indices.

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