This CIE Standard specifies the method of calculating the coordinates of the CIE 1976 L*u*v*
colour space including correlates of lightness, chroma, saturation and hue. It includes two
methods for calculating Euclidean distances in this space to represent the relative perceived
magnitude of colour differences. It also specifies the method of calculating the coordinates of
the u',v' uniform chromaticity scale diagram.
The Standard is applicable to tristimulus values calculated using the colour-matching
functions of the CIE 1931 standard colorimetric system or the CIE 1964 standard colorimetric
system. The Standard may be used for the specification of colour stimuli perceived as
belonging to a reflecting or transmitting object, where a three-dimensional space more
uniform than tristimulus space is required. This includes self-luminous displays, like cathode
ray tubes, if they are being used to simulate reflecting or transmitting objects and if the stimuli
are appropriately normalized. The Standard, as a whole, does not apply to colour stimuli
perceived as belonging to an area that appears to be emitting light as a primary light source,
or that appears to be specularly reflecting such light. Only the u',v' chromaticity diagram
defined in Section 4.1 and the correlates of hue and saturation defined in Section 4.3 apply to
such colour stimuli.
BS EN ISO 11664-5:2011 Referenced Document
CIE 17.4-1987 International Lighting Vocabulary (E) (F) (G) (R)
BS EN ISO 11664-5:2011 history
2016BS EN ISO 11664-5:2016 Colorimetry. CIE 1976 L*u*v* colour space and u', v' uniform chromaticity scale diagram
2010BS EN ISO 11664-5:2011 Colorimetry. CIE 1976 L*u*v* Colour space and u', v' uniform chromaticity scale diagram