Colorimetry - Part 5: CIE 1976 L*u*v* Colour Space and u', v', Uniform Chromaticity Scale Diagram

CIE S 014-5:2009

Superseded by Colorimetry - Part 5: CIE 1976 L*u*v* Colour Space and u', v' Uniform Chromaticity Scale Diagram, 2nd Edition

Joint ISO/CIE Standard

ISO 11664-5:2009(E) / CIE S 014-5/E:2009

This joint ISO/CIE Standard (replacing CIE S 014-5/E:2009) 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 colourmatching functions of the CIE 1931 standard colorimetric system or the CIE 1964 standard colorimetric system. The Standard may be used for the specification ofcolour 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.

This Standard has been approved by CIE and by ISO.

The publication is written in English. It is readily available at the National Committees of the CIE or via the CIE Webshop.

The following members of TC 1-57 “Standards in Colorimetry” took part in the preparation of this Standard:

  • A.R. Robertson (CA) (Chair)
  • P.J. Alessi (US)
  • J.A. Bristow (SE)
  • J. Campos Acosta (ES)
  • R. Connelly (US)
  • J.-F. Decarreau (FR)
  • R. Harold (US)
  • R. Hirschler (HU)
  • H. Ikeda (JP)
  • B. Jordan (CA)
  • C. Kim (KR)
  • D. McDowell (US)
  • P. McGinley (AU)
  • Y. Ohno (US)
  • M.R. Pointer (GB)
  • K. Richter (DE)
  • G. Rösler (DE)
  • J.D. Schanda (HU)
  • R. Sève (FR)
  • K. Smith (GB)
  • K. Witt (DE)
  • H. Yaguchi (JP)
  • J. Zwinkels (CA)