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17-23-074

CIE 1976 L*u*v* colour space

CIELUV colour space

three-dimensional, approximately uniform colour space produced by plotting in rectangular coordinates L*, u*, v*, quantities defined by the equations:
L* = 116 f (Y/Yn) – 16


where
f (Y/Yn) = (Y/Yn)1/3 if (Y/Yn) > (6/29)3
f (Y/Yn) = (841/108) (Y/Yn) + 4/29 if (Y/Yn) ≤ (6/29)3
and Y, u′, v′ describe the colour stimulus considered and Yn, , describe a specified white achromatic stimulus

Note 1 to entry: Approximate correlates of lightness, saturation, chroma, and hue can be calculated as follows:
CIE 1976 lightness
L* = 116 f (Y/Yn) – 16
where
f (Y/Yn) = (Y/Yn)1/3 if (Y/Yn) > (6/29)3
f (Y/Yn) = (841/108) (Y/Yn) + 4/29 if (Y/Yn) ≤ (6/29)3
CIE 1976 u, v saturation

CIE 1976 u, v chroma

CIE 1976 u, v hue angle

Note 2 to entry: See also CIE 15 Colorimetry.

Note 3 to entry: See also ISO/CIE 11664-5 Colorimetry – Part 5: CIE 1976 L*u*v* Colour Space and u', v' Uniform Chromaticity Scale Diagram.

Note 4 to entry: This entry was numbered 845-03-54 in IEC 60050-845:1987.

Note 5 to entry: This entry was numbered 17-159 and 17-175 in CIE S 017:2011.

Publication date: 2020-12
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