ISO/CIE 11664-1:2019 Preview

Colorimetry -- Part 1: CIE standard colorimetric observers

This document specifies colour-matching functions for use in colorimetry. Two sets of colour-matching functions are specified.

— Colour-matching functions for the CIE 1931 standard colorimetric observer.

This set of colour-matching functions is representative of the colour-matching properties of observers with normal colour vision for visual field sizes of angular subtense from about 1° to about 4°, for vision at photopic levels of adaptation.

— Colour-matching functions for the CIE 1964 standard colorimetric observer.

This set of colour-matching functions is representative of the colour-matching properties of observers with normal colour vision for visual field sizes of angular subtense greater than about 4°, for vision at sufficiently high photopic levels and with spectral power distributions such that no participation of the rod receptors of the retina is to be expected.


General information

  • Status :  Published
    Publication date : 2019-06
  • Edition : 1
    Number of pages : 34
  • :
    CIE
    International Commission on Illumination
  • 17.180.20
    Colours and measurement of light

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