gamut mapping

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Absolute colorimetric

“Absolute colorimetric” (also known as colorimetric) is one of four rendering intents in gamut mapping.

The conversion of colour values from one colour space (e.g. sRGB on the monitor) to another colour space (e.g. CMYK in print) so that the colour reproduction remains as consistent as possible.

Relative colorimetric

“Relative Colorimetric” is one of four rendering intents in gamut mapping.

In gamut mapping, the rendering intent (rendering priority) is the strategy by which colours are converted from one colour space to another.
There are four types of rendering intents, defined by ICC: Perceprtual, Saturation, Absolute Colorimetric and Relative Colorimetric.