International Commission on Illumination . Founded in 1931 and headquartered in Vienna, Austria , the International Commission on Illumination (usually referred to as the CIE by its French name Commission internationale de l’éclairage) is the international authority on light, lighting, color and color spaces.
Organization
The CIE has eight active divisions, each of which establishes technical commissions to carry out its program under the supervision of the division director:
- Vision and Color
- Measurement of light and radiation
- Indoor Environment and Lighting Design
- Lighting and signage for transport
- Outdoor lighting and other applications
- Photochemistry and Photobiology
- General aspects of lighting
- Imaging Technology
Milestones
- In 1924 the standard photopic observer defined by the V function spectral luminous efficacy was established, followed in 1951 by the standard scotopic observer defined by the V function.
- Based on the Optical Society of America’s report on colorimetry in 1922 , the CIE held its eighth session in 1931 , with the intention of establishing an international agreement on colorimetric specifications and updating the 1922 recommendations of the OSA based on the events of the last decade. The meeting, which took place in Cambridge, UK, concluded with the formalization of the CIE 1931 XYZ color space and the definition of the CIE 1931 2 observer standard with the corresponding color matching functions, and standard lighting subjects A, B and C.
- In 1964 the 10 CIE observer standard and its corresponding color matching functions were added, as well as the new D6500 daylight standard illuminant, as well as a method for calculating daylight illuminant at correlated color temperatures other than 6,500 degrees Kelvin.
- In 1976 , the Commission developed the CIELAB and CIELUV color spaces, which are widely used today.
- Based on CIELAB, the CIEDE94 and CIEDE2000 color difference formulas are recommended in the corresponding years.
It is particularly the commission that paralyzed the measurement systems and acceptability standards used in modern colorimetry.
