ISO/CIE 11664-1
Colorimetry — Part 1: CIE standard colorimetric observers
| Organization: | ISO |
| Publication Date: | 1 June 2019 |
| Status: | active |
| Page Count: | 42 |
| ICS Code (Colours and measurement of light): | 17.180.20 |
scope:
This document specifies colour-matching functions for use in colorimetry. Two sets of colour-matching functions are specified.
a) 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.
b) 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.
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