EN ISO/CIE 11664-5:2024
(Main)Colorimetry - Part 5: CIE 1976 L*u*v* colour space and u', v' uniform chromaticity scale diagram (ISO/CIE 11664-5:2024)
Colorimetry - Part 5: CIE 1976 L*u*v* colour space and u', v' uniform chromaticity scale diagram (ISO/CIE 11664-5:2024)
This document specifies the method of calculating the coordinates of the CIE 1976 L*u*v* colour space including correlates of lightness, chroma, saturation and hue. It includes two methods for calculating Euclidean distances in this space to represent the relative perceived magnitude of colour differences. It also specifies the method of calculating the coordinates of the u′,v′ uniform chromaticity scale diagram.
This document is applicable to tristimulus values calculated using the colour-matching functions of the CIE 1931 standard colorimetric system or the CIE 1964 standard colorimetric system. This document is applicable for the specification of colour stimuli perceived as belonging to a reflecting or transmitting object, where a three-dimensional space more uniform than tristimulus space is required. This includes self-luminous displays, like computer, television and smart-phone displays, if they are being used to simulate reflecting or transmitting objects and if the stimuli are appropriately normalized.
This document, as a whole, does not apply to colour stimuli perceived as belonging to an area that appears to be emitting light as a primary light source or that appears to be specularly reflecting such light. Only the u′,v′ uniform chromaticity scale diagram defined in 4.1 and the correlates of hue and saturation defined in 4.3 apply to such colour stimuli.
Farbmetrik - Teil 5: CIE 1976 L*u*v*-Farbenraum und gleichabständige u', v'‑Farbtafel (ISO/CIE 11664-5:2024)
Dieses Dokument legt das Verfahren zum Berechnen der Koordinaten des CIE 1976 L*u*v* Farbenraums fest, einschließlich Zuordnungen für Helligkeit, Buntheit, Sättigung und Buntton. Es enthält zwei Verfahren zum Berechnen euklidischer Abstände in diesem Farbenraum, um die relative empfindungsgemäße Größe von Farbabständen darzustellen. Außerdem legt sie das Verfahren zum Berechnen der Koordinaten der gleichabständigen u',v' Farbtafel fest.
Dieses Dokument ist auf Farbwerte anwendbar, die nach den Spektralwertfunktionen des Normvalenzsystems CIE 1931 oder des Normvalenzsystems CIE 1964 berechnet wurden. Dieses Dokument ist für die Festlegung von Farbreizen anwendbar, die als zu einem reflektierenden oder transmittierenden Objekt zugehörig empfunden werden, wenn ein dreidimensionaler Farbenraum erforderlich ist, der gleichabständiger ist als der Farbenraum der Farbwerte. Dies schließt selbstleuchtende Displays, wie Computer , Fernseh- und Smartphone-Bildschirme ein, wenn sie dazu verwendet werden, reflektierende oder transmittierende Objekte zu simulieren, und wenn die Farbreize in geeigneter Weise normiert sind.
Dieses Dokument als Ganzes ist nicht auf Farbreize anwendbar, die als zu einer Fläche zugehörig empfunden werden, welche Licht als eine primäre Lichtquelle zu emittieren oder solches Licht gerichtet zu reflektieren scheint. Nur die in 4.1 definierte gleichabständige u',v‘ Farbtafel und die in 4.3 definierten Zuordnungen von Buntton und Sättigung gelten für solche Farbreize.
Colorimétrie - Partie 5: Espace chromatique L*u*v* et diagramme de chromaticité uniforme u’, v’ CIE 1976 (ISO/CIE 11664-5:2024)
Le présent document spécifie la méthode de calcul des coordonnées de l’espace chromatique CIE 1976 L*u*v*, et des corrélats de clarté, chroma, saturation et teinte. Elle comprend deux méthodes permettant de calculer les distances euclidiennes dans cet espace, pour représenter l’amplitude relative perçue des différences de couleurs. Elle spécifie également la méthode de calcul des coordonnées du diagramme de chromaticité uniforme u’,v’.
Le présent document s’applique aux composantes trichromatiques calculées à l’aide des fonctions d’égalisation de couleur du système de référence colorimétrique CIE 1931 ou du système de référence colorimétrique CIE 1964. Le présent document est applicable dans la spécification de stimuli de couleurs perçus comme appartenant à un objet transparent, translucide ou réfléchissant, lorsqu’un espace tridimensionnel plus uniforme que l’espace des composantes trichromatiques est requis. Sont inclus certains écrans d’affichage lumineux par eux-mêmes, tels que les écrans d’ordinateur, de télévision et de téléphones portables, s’ils sont utilisés pour simuler des objets transparents, translucides ou réfléchissants et si les stimuli sont normalisés de manière appropriée.
Le présent document, dans son ensemble, n’est pas applicable aux stimuli de couleurs perçus comme appartenant à une surface qui semble émettre de la lumière comme une source primaire de lumière ou réfléchir spéculairement une telle lumière. Seul le diagramme de chromaticité uniforme u′,v′ défini en 4.1 et les notions corrélatives de teinte et de saturation définies en 4.3 s’appliquent à de tels stimuli de couleurs.
Kolorimetrija - 5. del: Barvni prostor L*u*v* in diagram enakomerne barvnosti u', v' po CIE 1976 (ISO/CIE DIS 11664-5:2023)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN ISO/CIE 11664-5:2023
01-maj-2023
Kolorimetrija - 5. del: Barvni prostor L*u*v* in diagram enakomerne barvnosti u', v'
po CIE 1976 (ISO/CIE DIS 11664-5:2023)
Colorimetry - Part 5: CIE 1976 L*u*v* colour space and u', v' uniform chromaticity scale
diagram (ISO/CIE DIS 11664-5:2023)
Farbmetrik - Teil 5: CIE 1976 L*u*v*-Farbenraum und gleichabständige u', v'-Farbtafel
(ISO/CIE DIS 11664-5:2023)
Colorimétrie Partie 5: Espace chromatique L*u*v* et diagramme de chromaticité
uniforme u', v' CIE 1976 (ISO/CIE DIS 11664-5:2023)
Ta slovenski standard je istoveten z: prEN ISO/CIE 11664-5
ICS:
17.180.20 Barve in merjenje svetlobe Colours and measurement of
light
oSIST prEN ISO/CIE 11664-5:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN ISO/CIE 11664-5:2023
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DRAFT INTERNATIONAL STANDARD
ISO/CIE DIS 11664-5
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Voting begins on: Voting terminates on:
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Colorimetry —
Part 5:
CIE 1976 L*u*v* colour space and u', v' uniform
chromaticity scale diagram
Colorimétrie —
Partie 5: Espace chromatique L*u*v* et diagramme de chromaticité uniforme u', v' CIE 1976
ICS: 17.180.20
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oSIST prEN ISO/CIE 11664-5:2023
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DRAFT INTERNATIONAL STANDARD
ISO/CIE DIS 11664-5
CIE Secretariat: CIE
Voting begins on: Voting terminates on:
Colorimetry —
Part 5:
CIE 1976 L*u*v* colour space and u', v' uniform
chromaticity scale diagram
Colorimétrie —
Partie 5: Espace chromatique L*u*v* et diagramme de chromaticité uniforme u', v' CIE 1976
ICS: 17.180.20
Member bodies are requested to consult relevant national interests in ISO/TC
274 before casting their ballot to the e-Balloting application.
This document is circulated as received from the committee secretariat.
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Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviated terms . 1
3.1 Terms and definitions . 1
3.2 Symbols and abbreviated terms . 2
4 Calculation method . 2
4.1 Uniform chromaticity scale diagram (UCS diagram) . 2
4.2 Uniform colour space . 3
4.3 Correlates of lightness, saturation, chroma and hue . 4
4.4 Colour differences . 5
Annex A (informative) Reverse transformation . 7
Bibliography . 8
iii
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ISO/CIE DIS 11664-5:2023(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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO's adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information.
The committee responsible for this document is ISO/TC 274, Light and lighting.
This second edition cancels and replaces the first edition (ISO 11664-5:2009), of which it constitutes a
minor revision.
ISO 11664 consists of the following parts, under the general title Colorimetry:
— Part 1: CIE standard colorimetric observers
— Part 2: CIE standard illuminants
— Part 3: CIE tristimulus values
— Part 4: CIE 1976 L*a*b* Colour space
— Part 5: CIE 1976 L*u*v* Colour space and u′, v′ uniform chromaticity scale diagram
— Part 6: CIE-DE2000 Colour-difference formula
iv
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Introduction
The three-dimensional colour space produced by plotting CIE tristimulus values (X,Y,Z) in rectangular
coordinates is not visually uniform nor is the (x,y,Y) space nor the two-dimensional CIE x,y chromaticity
diagram. Equal distances in these spaces and diagrams do not represent equally perceptible differences
between colour stimuli. For this reason, in 1976, the CIE introduced and recommended two new
spaces (known as CIELAB and CIELUV) whose coordinates are non-linear functions of X, Y and Z. The
recommendation was put forward in an attempt to unify the then very diverse practice in uniform
[2][8]
colour spaces and associated colour difference formulae . Both these more-nearly uniform colour
spaces have become well accepted and widely used. Numerical values representing approximately
the relative magnitude of colour differences can be described by simple Euclidean distances in the
spaces or by more sophisticated formulae that improve the correlation with the relative perceived size
of differences. The purpose of this part of ISO/CIE 11664 is to define procedures for calculating the
coordinates of the CIE 1976 L*u*v* (CIELUV) colour space and the Euclidean colour difference values
based on these coordinates. This part of ISO/CIE 11664 also defines a related chromaticity diagram
that is a projection of the CIE x,y chromaticity diagram maintaining straight lines of dominant and
complementary wavelengths. This part of ISO/CIE 11664 does not cover the alternative uniform colour
[5]
space, CIELAB , nor does it cover more sophisticated colour difference formulae based on CIELAB,
[3] [1] [4] [6]
such as the CMC formula , the CIE 94 formula , the DIN 99 formula , and the CIEDE2000 formula .
v
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oSIST prEN ISO/CIE 11664-5:2023
DRAFT INTERNATIONAL STANDARD ISO/CIE DIS 11664-5:2023(E)
Colorimetry —
Part 5:
CIE 1976 L*u*v* colour space and u', v' uniform
chromaticity scale diagram
1 Scope
This part of ISO/CIE 11664 specifies the method of calculating the coordinates of the CIE 1976 L*u*v*
colour space including correlates of lightness, chroma, saturation and hue. It includes two methods for
calculating Euclidean distances in this space to represent the relative perceived magnitude of colour
differences. It also specifies the method of calculating the coordinates of the u′,v′ uniform chromaticity
scale diagram.
This part of ISO/CIE 11664 is applicable to tristimulus values calculated using the colour-matching
functions of the CIE 1931 standard colorimetric system or the CIE 1964 standard colorimetric system.
This part of ISO/CIE 11664 may be used for the specification of colour stimuli perceived as belonging
to a reflecting or transmitting object, where a three-dimensional space more uniform than tristimulus
space is required. This includes self-luminous displays, like computer, television and smart-phone
displays, if they are being used to simulate reflecting or transmitting objects and if the stimuli are
appropriately normalized. This part of ISO/CIE 11664, as a whole, does not apply to colour stimuli
perceived as belonging to an area that appears to be emitting light as a primary light source or that
appears to be specularly reflecting such light. Only the u′,v′ uniform chromaticity scale diagram defined
in 4.1 and the correlates of hue and saturation defined in 4.3 apply to such colour stimuli.
2 Normative references
The following referenced documents are indispensable for the application 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 11664-1, Colorimetry — Part 1: CIE standard colorimetric observers
ISO/CIE 11664-2, Colorimetry — Part 2: CIE standard illuminants
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org
CIE maintains a terminological database for use in standardization at the following address:
— ILV: International Lighting Vocabulary: available at http:// cie .co .at/ e -ilv
© ISO/CIE 2023 – All rights reserved
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ISO/CIE DIS 11664-5:2023(E)
3.2 Symbols and abbreviated terms
X, Y, Z tristimulus values of a test s
...
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