How the CIE 1931 RGB Color Matching Functions Were Developed from the Initial Color Matching Experiments (Yuhao Zhu, ) Ī beginner’s guide to (CIE) colorimetry (Chandler Abraham) For definitions of the CIE colorimetric colour spaces see here. NOTE CIE XYZ tristimulus values are colorimetric coordinates, as are RGB values that have an exact and invertible mathematical relationship to CIE XYZ tristimulus values". "colour space defined by 3 colorimetric coordinates. In an alternative usage found particularly in the literature of Adobe Inc., the term color space is restricted to what the CIE calls a colorimetric colour space, and non-colorimetric colour spaces are referred to as color models. "geometric representation of colour in space, usually of 3 dimensions". "collection of colour samples arranged and identified according to specified rules". This facilitates the communication of colour but is not a prerequisite for defining a colour order system". NOTE A colour order system is usually exemplified by a set of physical samples, sometimes known as a colour atlas. "arrangement of samples according to a set of principles for the ordering and denotation of their colour, usually according to defined scales.
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