EN ISO/CIE 11664-6:2022

Colorimetry - Part 6: CIEDE2000 colour-difference formula (ISO/CIE 11664-6:2022)

This document specifies the method of calculating colour differences according to the CIEDE2000 formula.
This document is applicable to input values of CIELAB L*, a*, b* coordinates calculated according to ISO/CIE 11664-4. It can be used for the specification of the colour difference between two colour stimuli perceived as belonging to reflecting or transmitting objects. This includes displays if they are being used to simulate reflecting or transmitting objects and if the tristimulus values representing the stimuli are appropriately normalized.
This document does not apply to colour stimuli perceived as belonging to areas that appear to be emitting light as primary light sources or that appear to be specularly reflecting such light.

Farbmetrik - Teil 6: CIEDE2000‑Formel für den Farbabstand (ISO/CIE 11664-6:2022)

Dieses Dokument legt das Verfahren zur Berechnung von Farbabständen entsprechend der CIEDE2000-Formel fest.
Dieses Dokument gilt für Eingabewerte von CIELAB L* , a* , b* Koordinaten, die entsprechend ISO/CIE 11664 4 berechnet wurden. Es kann angewendet werden für die Festlegung des Farbabstands zwischen zwei Farbreizen, die als zu einem reflektierenden oder transmittierenden Objekt zugehörig empfunden werden. Dazu gehören Displays, wenn sie dazu verwendet werden, reflektierende oder transmittierende Objekte zu simulieren und wenn die Farbwerte, welche die Farbreize darstellen, in geeigneter Weise normiert sind.
Dieses Dokument gilt nicht für Farbreize, die von Flächen ausgehen, welche Licht als Selbstleuchter abstrahlen oder Licht durch Glanzeffekte spiegeln.

Colorimétrie - Partie 6: Formule de la différence de couleur CIEDE2000 (ISO/CIE 11664-6:2022)

Le présent document spécifie la méthode de calcul des différences de couleurs selon la formule CIEDE2000.
Il s'applique aux données initiales des coordonnées CIELAB L*, a*, b* calculées selon l’ISO/CIE 11664-4. Il peut être utilisé pour spécifier la différence de couleur entre deux stimuli de couleurs perçus comme appartenant à des objets réfléchissants ou transparents ou translucides. Sont inclus certains écrans d’affichage s’ils sont utilisés pour simuler des objets réfléchissants ou transparents ou translucides et si les composantes trichromatiques représentant les stimuli sont normalisées de manière appropriée.
Le présent document n’est pas applicable aux stimuli de couleurs perçus comme appartenant à des surfaces qui semblent émettre de la lumière comme des sources primaires de lumière, ou réfléchir spéculairement une telle lumière.

Kolorimetrija - 6. del: Formula barvne razlike CIEDE2000 (ISO/CIE 11664-6:2022)

General Information

• Status: Published
• Publication Date: 20-Sep-2022
• ICS: 17.180.20 - Colours and measurement of light
• Technical Committee: CEN/TC 139 - Paints and varnishes
• Drafting Committee: CEN/TC 139 - Paints and varnishes
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 21-Sep-2022
• Completion Date: 21-Sep-2022
• Ref Project: SIST EN ISO/CIE 11664-6:2022 - Colorimetry - Part 6: CIEDE2000 colour-difference formula (ISO/CIE 11664-6:2022)

Relations

• Replaces: EN ISO 11664-6:2016 - Colorimetry - Part 6: CIEDE2000 Colour-difference formula (ISO/CIE 11664-6:2014)
• Effective Date: 28-Sep-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2022
Nadomešča:
SIST EN ISO 11664-6:2016
Kolorimetrija - 6. del: Formula barvne razlike CIEDE2000 (ISO/CIE 11664-6:2022)
Colorimetry - Part 6: CIEDE2000 colour-difference formula (ISO/CIE 11664-6:2022)
Farbmetrik - Teil 6: CIEDE2000‑Formel für den Farbabstand (ISO/CIE 11664-6:2022)
Colorimétrie - Partie 6: Formule de la différence de couleur CIEDE2000 (ISO/CIE 11664-
6:2022)
Ta slovenski standard je istoveten z: EN ISO/CIE 11664-6:2022
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 11664-6
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2022
EUROPÄISCHE NORM
ICS 17.180.20 Supersedes EN ISO 11664-6:2016
English Version
Colorimetry - Part 6: CIEDE2000 colour-difference formula
(ISO/CIE 11664-6:2022)
Colorimétrie - Partie 6: Formule de la différence de Farbmetrik - Teil 6: CIEDE2000-Formel für den
couleur CIEDE2000 (ISO/CIE 11664-6:2022) Farbabstand (ISO/CIE 11664-6:2022)
This European Standard was approved by CEN on 13 August 2022.

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, Türkiye 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO/CIE 11664-6:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO/CIE 11664-6:2022) has been prepared by Technical Committee ISO/TC 274
"Light and lighting" 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 March 2023, and conflicting national standards shall
be withdrawn at the latest by March 2023.
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 11664-6:2016.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO/CIE 11664-6:2022 has been approved by CEN as EN ISO/CIE 11664-6:2022 without any
modification.
INTERNATIONAL ISO/CIE
STANDARD 11664-6
Second edition
2022-08
Colorimetry —
Part 6:
CIEDE2000 colour-difference formula
Colorimétrie —
Partie 6: Formule de la différence de couleur CIEDE2000
Reference number
ISO/CIE 11664-6:2022(E)
© ISO/CIE 2022
ISO/CIE 11664-6:2022(E)
© ISO/CIE 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester
ISO copyright office CIE Central Bureau
CP 401 • Ch. de Blandonnet 8 Babenbergerstraße 9/9A • A-1010 Vienna
CH-1214 Vernier, Geneva
Phone: [phone] Phone: [phone]
Fax: [phone]
Email: [e-mail] Email: [e-mail]
Website: www.iso.org Website: www.cie.co.at
Published in Switzerland
ii
© ISO/CIE 2022 – All rights reserved

ISO/CIE 11664-6:2022(E)
Contents Page
Foreword .iv
Introduction .v
1 S c op e . 1
2 Nor m at i ve r ef er enc e s . 1
3 Terms and definitions . 1
4 S y mb ol s . 1
5 R ef er enc e c ond it ion s .2
6 C a lc u l at ion me t ho d . 3
7 P a r a me t r ic f ac t or s . 5
Annex A (informative) Three-component micro-spaces . 6
Bibliography . 7
iii
© ISO/CIE 2022 – All rights reserved

ISO/CIE 11664-6:2022(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, in collaboration with the European Committee
for Standardization (CEN) Technical Committee CEN/TC 139, Paints and varnishes, in accordance with
the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO/CIE 11664-6:2014), of which it constitutes
a minor revision. The changes are as follows:
— normative references updated;
— previous Clause 3 split into Clauses 3 and 4;
— Clause 6: previous NOTE 1 changed to body text;
— minor editorial changes.
A list of all parts in the ISO/CIE 11664 series can be found on the ISO website and the CIE website.
Any feedback or questions on this document should be directed to the CIE Central Bureau or the user’s
national standards body. A complete listing of these bodies can be found at www.iso.org/members.html.
iv
© ISO/CIE 2022 – All rights reserved

ISO/CIE 11664-6:2022(E)
Introduction
The three-dimensional colour space produced by plotting CIE tristimulus values (X, Y, Z) in rectangular
coordinates is not visually uniform. Neither is the (x, y, Y) space nor the two-dimensional CIE (x, y)
chromaticity diagram. Equal distances in these spaces and the respective diagram do not represent
equally perceptible differences between colour stimuli. For this reason, the CIE has standardized two
more-nearly uniform colour spaces (known as CIELAB and CIELUV), whose coordinates are non-linear
functions of X, Y and Z. Numerical values representing approximately the relative magnitude of colour
differences can be described by simple Euclidean distances in these spaces or by more sophisticated
colour-difference formulae that improve the correlation with the relative perceived size of differences.
The purpose of this document is to define one such formula, the CIEDE2000 formula. This document is
based on CIE 142-2001.
The formula is an extension of the CIE 1976 L*a*b* colour-difference formula (ISO/CIE 11664-4) with
corrections for variation in colour-difference perception dependent on lightness, chroma, hue and
chroma-hue interaction. Reference conditions define material and viewing environment characteristics
to which the formula applies.
v
© ISO/CIE 2022 – All rights reserved

INTERNATIONAL STANDARD ISO/CIE 11664-6:2022(E)
Colorimetry —
Part 6:
CIEDE2000 colour-difference formula
1 S cope
This document specifies the method of calculating colour differences according to the CIEDE2000
formula.
This document is applicable to input values of CIELAB L*, a*, b* coordinates calculated according to
ISO/CIE 11664-4. It can be used for the specification of the colour difference between two colour
stimuli perceived as belonging to reflecting or transmitting objects. This includes displays if they are
being used to simulate reflecting or transmitting objects and if the tristimulus values representing the
stimuli are appropriately normalized.
This document does not apply to colour stimuli perceived as belonging to areas that appear to be
emitting light as primary light sources or that appear to be specularly reflecting such light.
2 Normat ive references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO/CIE 11664-4, Colorimetry — Part 4: CIE 1976 L*a*b* colour space
CIE S 017, ILV: International Lighting Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in CIE S 017 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO
...