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API STD 521: Guide for Pressure-relieving and Depressuring Systems – Edition 6

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ISO 11664:2019

ISO 11664:2019 Colorimetry – Part 1: CIE standard colorimetric observers

CDN $295.00

SKU: a520d847b83d Categories: ,

Description

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.

Edition

1

Published Date

2019-06-12

Status

PUBLISHED

Pages

34

Language Detail Icon

English

Format Secure Icon

Secure PDF

Abstract

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.

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