International Commission on Illumination

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The International Commission on Illumination (usually abbreviated CIE for its French name, Commission internationale de l'éclairage) is the international authority on light, illumination, color, and color spaces. It was established in 1913 as a successor to the Commission Internationale de Photométrie and is today based in Vienna, Austria.



The CIE has seven active divisions, each of which establishes technical committees to carry out its program under the supervision of the division's director:


  • In 1964 the 10° CIE standard observer and its corresponding color matching functions as well as the new standard daylight illuminant D6500 were added, as well as a method for calculating daylight illuminants at correlated color temperatures other than 6500 kelvins.
  • In 1976, the commission developed the CIELAB and CIELUV color spaces, which are widely-used today.
  • Based on CIELAB, color difference formulas CIEDE94 and CIEDE2000 were recommended in the corresponding years.

See also

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