EN ISO/CIE 11664-1:2019

SLOVENSKI STANDARD
01-september-2019
Nadomešča:
SIST EN ISO 11664-1:2011
Kolorimetrija - 1. del: Standardizirani barvnometrični opazovalec CIE (ISO/CIE
11664-1:2019)
Colorimetry - Part 1: CIE standard colorimetric observers (ISO/CIE 11664-1:2019)
Farbmetrik - Teil 1: CIE farbmetrische Normalbeobachter (ISO/CIE 11664-1:2019)
Colorimétrie - Partie 1: Observateurs CIE de référence pour la colorimétrie (ISO/CIE
11664-1:2019)
Ta slovenski standard je istoveten z: EN ISO/CIE 11664-1:2019
ICS:
17.180.20 Barve in merjenje svetlobe Colours and measurement of
light
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO/CIE 11664-1
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2019
EUROPÄISCHE NORM
ICS 17.180.20 Supersedes EN ISO 11664-1:2011
English Version
Colorimetry - Part 1: CIE standard colorimetric observers
(ISO/CIE 11664-1:2019)
Colorimétrie - Partie 1: Observateurs CIE de référence Farbmetrik - Teil 1: CIE farbmetrische
pour la colorimétrie (ISO/CIE 11664-1:2019) Normalbeobachter (ISO/CIE 11664-1:2019)
This European Standard was approved by CEN on 24 May 2019.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO/CIE 11664-1:2019 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO/CIE 11664-1:2019) has been prepared by Technical Committee CEI
"International Commission on Illumination" in collaboration with Technical Committee CEN/TC 139
“Paints and varnishes” the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by January 2020, and conflicting national standards shall
be withdrawn at the latest by January 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 11664-1:2011.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO/CIE 11664-1:2019 has been approved by CEN as EN ISO/CIE 11664-1:2019 without any
modification.
INTERNATIONAL ISO/CIE
STANDARD 11664-1
First edition
2019-06
Colorimetry —
Part 1:
CIE standard colorimetric observers
Colorimétrie —
Partie 1: Observateurs CIE de référence pour la colorimétrie
Reference number
ISO/CIE 11664-1:2019(E)
©
ISO/CIE 2019
ISO/CIE 11664-1:2019(E)
© ISO/CIE 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
ii © ISO/CIE 2019 – All rights reserved

ISO/CIE 11664-1:2019(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Specifications . 5
4.1 Colour-matching functions . 5
4.2 Spectral chromaticity coordinates . 5
5 Derivation of the colour-matching functions for the CIE 1931 standard colorimetric
observer . 5
5.1 Experimental basis . 5
5.2 Transformation procedures . 6
5.3 Transformation properties . 6
5.4 Comparison with earlier data . 7
6 Derivation of the colour-matching functions for the CIE 1964 standard colorimetric
observer . 7
6.1 Experimental basis . 7
6.2 Transformation procedures . 7
6.3 Transformation properties . 8
6.4 Comparison with earlier data . 8
7 Practical application of colour-matching functions for CIE standard colorimetric
observers . 8
7.1 Obtaining tristimulus values . 8
7.2 The basis for integration . 9
7.3 Rod activity. 9
7.4 The use of restricted data . 9
7.5 Standard of reflectance . 9
Bibliography .34
© ISO/CIE 2019 – All rights reserved iii

ISO/CIE 11664-1:2019(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso
.org/iso/foreword .html.
This document was prepared by the International Commission on Illumination (CIE) in cooperation
with Technical Committee ISO/TC 274, Light and lighting.
This first edition of ISO/CIE 11664-1 cancels and replaces ISO 11664-1:2007 | CIE S 014-1:2006, of which
it constitutes a minor revision, incorporating minor editorial updates.
A list of all parts in the ISO 11664 and ISO/CIE 11664 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO/CIE 2019 – All rights reserved

ISO/CIE 11664-1:2019(E)
Introduction
Colours with different spectral compositions can look alike. An important function of colorimetry is to
determine whether a pair of such metameric colour stimuli will look alike. The use of visual colorimeters
for this purpose is handicapped by variations in the colour matches made among observers classified as
having normal colour vision. Visual colorimetry also tends to be time-consuming. For these reasons, it
has long been the practice in colorimetry to make use of sets of colour-matching functions to calculate
tristimulus values for colours: equali
...