Judd-Vos-modified CIE 2-deg colour matching functions (1978)

Data key


  1. Wavelength (nm)


    In 1978, Vos made additional corrections to Judd's (1951) revision of the CIE 1931 2 deg color matching functions (CIE, 1932) and incorporated the infra-red color reversal described by Brindley (1955). The Judd-Vos V(λ) is the modified luminosity function VM(λ) recently adopted by the CIE.

From Table 1 of Vos(1978). See also Table I(5.5.2) of Wyszecki and Stiles (1982).


Brindley, G. S. (1955). The colour of light of very long wavelength. Journal of Physiology, 130, 35-44.

CIE. (1932). Commission Internationale de l’Éclairage Proceedings, 1931. Cambridge: Cambridge University Press.

Judd, D. B. (1951). Report of U.S. Secretariat Committee on Colorimetry and Artificial Daylight. In Proceedings of the Twelfth Session of the CIE, Stockholm (vol. 1, pp. 11). Paris: Bureau Central de la CIE.

Vos, J. J. (1978). Colorimetric and photometric properties of a 2-deg fundamental observer. Color Research and Application, 3, 125-128.

Wyszecki, G., & Stiles, W. S. (1982). Color Science: concepts and methods, quantitative data and formulae. (2nd ed.). New York: Wiley.