Three dimensional (3-d) look up table (lut) used for gamut mapping in floating point format

An apparatus comprising:

• a data segmenter configured to:
• determine indices based on fractional values of floating-point representations of component values of an input color that are selected based on exponent values of the floating-point representations, wherein the component values are defined according to a source gamut, and
• determine offsets associated with the indices using subsets of the fractional values;
• and
• an interpolator configured to map the input color to an output color defined according to a destination gamut based on a the indices and offsets.

A method, comprising:

• converting, at a data segmenter of an electronic device, floating-point representations of component values of an input color to fixed point representations of indices of the component values of the input color and corresponding offsets, wherein the component values are defined according to a source gamut;
• identifying, at an address decoder, vertices in a three-dimensional (3-D) look up table (LUT) that encompass a location in the 3-D LUT indicated by the fixed point representation of the indices and the corresponding offsets;
• and
• mapping, at an interpolator, the input color to an output color defined according to a destination gamut based on the location in the 3-D LUT.