1、BS EN ISO 11664-5:2016ColorimetryPart 5: CIE 1976 L*u*v* colour space and u, v uniform chromaticity scale diagram (ISO/CIE 11664-5:2016)BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN ISO 11664-5:2016 BRITISH STANDARDNational forewordThis British Standard is th
2、e UK implementation of EN ISO 11664-5:2016. It supersedes BS EN ISO 11664-5:2011 which iswithdrawn.The UK participation in its preparation was entrusted to Technical Committee EL/1, Light and lighting applications.A list of organizations represented on this committee can be obtained on request to it
3、s secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 90595 7 ICS 17.180.20 Compliance with a British Standar
4、d cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO
5、 11664-5 September 2016 ICS 17.180.20 Supersedes EN ISO 11664-5:2011English Version Colorimetry - Part 5: CIE 1976 L*u*v* Colour space and u, v uniform chromaticity scale diagram (ISO/CIE 11664-5:2016) Colorimtrie - Partie 5: Espace chromatique L*u*v* et diagramme de chromaticit uniforme u, v CIE 19
6、76 (ISO/CIE 11664-5:2016) Farbmetrik - Teil 5: CIE 1976 L*u*v* Farbenraum und gleichabstndige u, v Farbtafel (ISO/CIE 11664-5:2016) This European Standard was approved by CEN on 1 July 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
7、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
8、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 bodie
9、s of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spa
10、in, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwid
11、e for CEN national Members. Ref. No. EN ISO 11664-5:2016 EBS EN ISO 11664-5:2016EN ISO 11664-5:2016 (E) 3 European foreword This document (EN ISO 11664-5:2016) has been prepared by Technical Committee ISO/TC 274 “Light and lighting“ in collaboration with Technical Committee CEN/TC 139 “Paints and va
12、rnishes” 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 2017, and conflicting national standards shall be withdrawn at the latest by March 2017. Att
13、ention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 11664-5:2011. According to the CEN-CENELEC Internal Regul
14、ations, 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, It
15、aly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO/CIE 11664-5:2016 has been approved by CEN as EN ISO 11664-5:2016 without any modification. BS E
16、N ISO 11664-5:2016ISO/CIE 11664-5:2016(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms, definitions, symbols and abbreviated terms . 13.1 Terms and definitions . 13.2 Symbols and abbreviated terms. 24 Calculation method 24.1 Uniform chromaticity scale diagram (UCS diagram) . 24
17、.2 Uniform colour space 34.3 Correlates of lightness, saturation, chroma and hue 44.4 Colour differences 5Annex A (informative) Reverse transformation . 7Bibliography 8 ISO/CIE 2016 All rights reserved iiiContents PageBS EN ISO 11664-5:2016ISO/CIE 11664-5:2016(E)ForewordISO (the International Organi
18、zation 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 establishe
19、d 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.T
20、he 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
21、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
22、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 e
23、xplanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.The committee r
24、esponsible for this document is ISO/TC 274, Light and lighting.This first edition of ISO/CIE 11664-5 cancels and replaces ISO 11664-5:2009, of which it constitutes a minor revision. (ISO 11664-5:2009 was prepared by CIE Technical Committee TC 1-57 of Division 1.)ISO 11664 consists of the following p
25、arts, 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 spaceISO/CIE 11664 consists of the following parts, under the general title Colorimetry: Part 5: CIE 1976 L*u*v* colou
26、r space and u, v uniform chromaticity scale diagram Part 6: CIEDE2000 Colour-difference formulaiv ISO/CIE 2016 All rights reservedBS EN ISO 11664-5:2016ISO/CIE 11664-5:2016(E)IntroductionThe three-dimensional colour space produced by plotting CIE tristimulus values (X, Y, Z) in rectangular coordinat
27、es 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
28、(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 colour spaces and associated colour difference formulae.28Both these more-nearly uniform colour spaces have becom
29、e 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 p
30、urpose 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
31、 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 space, CIELAB,5nor does it cover more sophisticated colour difference formulae based on CIELAB, such as the CMC formula,
32、3the CIE 94 formula,1the DIN 99 formula,4and the CIEDE2000 formula.6 ISO/CIE 2016 All rights reserved vBS EN ISO 11664-5:2016BS EN ISO 11664-5:2016Colorimetry Part 5: CIE 1976 L*u*v* colour space and u, v uniform chromaticity scale diagram1 ScopeThis part of ISO/CIE 11664 specifies the method of cal
33、culating 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 c
34、alculating 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
35、 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 cathode ray tubes, if they are being used to simulate reflec
36、ting 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.
37、 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 referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its applicati
38、on. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 116641/CIE S 014-1, Colorimetry Part 1: CIE standard colorimetric observersISO 116642/CIE S 014-1, Colorimetry Part 2: CIE standard i
39、lluminantsCIE S 017, ILV: International Lighting Vocabulary3 Terms, definitions, symbols and abbreviated terms3.1 Terms and definitionsFor the purposes of this document, the terms and definitions given in CIE S 017 apply.INTERNATIONAL STANDARD ISO/CIE 11664-5:2016(E) ISO/CIE 2016 All rights reserved
40、 1BS EN ISO 11664-5:2016ISO/CIE 11664-5:2016(E)3.2 Symbols and abbreviated termsX, Y, Z tristimulus values of a test stimulus calculated using the colour-matching functions of the CIE 1931 standard colorimetric system (also known as the CIE 2 standard colorimet-ric system)Yntristimulus value, Y, of
41、a specified white colour stimulus calculated using the colour-matching functions of the CIE 1931 standard colorimetric systemx, y chromaticity coordinates of a test stimulus calculated using the colour-matching functions of the CIE 1931 standard colorimetric systemL* CIELUV lightnessu*, v* CIELUV u*
42、,v* coordinatesu, v CIE 1976 chromaticity coordinatesuvnn,CIE 1976 chromaticity coordinates of a specified white stimulussuvCIELUV saturationCuv*CIELUV chromahuvCIELUV hue angle(u,v) CIELUV chromaticity differenceL* CIELUV lightness differenceu*, v* CIELUV u*,v* differencesCuv*CIELUV chroma differen
43、cehuvCIELUV hue angle differenceHuv*CIELUV hue differenceEuv*CIELUV colour differenceIf the character “” is not available, it may be replaced by the character “D”.The terms “CIE 1976 L*u*v*” and “CIELUV” may be used interchangeably.Where tristimulus values are calculated using the colour-matching fu
44、nctions of the CIE 1964 standard colorimetric system (also known as the CIE 10 standard colorimetric system), a subscript 10 shall be added to all the above symbols.4 Calculation method4.1 Uniform chromaticity scale diagram (UCS diagram)The CIE 1976 uniform chromaticity scale diagram is a projective
45、 transformation of the CIE x,y chromaticity diagram yielding perceptually more uniform colour spacing. It is produced by plotting, as abscissa and ordinate, respectively, quantities defined by the following formulae:uXXYZ= +()4153 (1)2 ISO/CIE 2016 All rights reservedBS EN ISO 11664-5:2016ISO/CIE 11
46、664-5:2016(E)vYXYZ=9153+()(2)where X, Y, Z are the tristimulus values of the test colour stimulus based on the CIE 1931 standard colorimetric system defined in ISO 11664-1/CIE S 014-1.The same quantities may be obtained by the following formulae:uxxy= + +()4212 3 (3)vyxy= + +()9212 3 (4)where x and
47、y are obtained by the following formulae:xXXYZ=+()(5)yYXYZ=+()(6)Euclidean distances in this diagram can be used to represent approximately the relative perceived magnitude of colour differences between colour stimuli of negligibly different luminances, of approximately the same size, and viewed in
48、identical surroundings, by an observer photopically adapted to a field with the chromaticity of CIE standard illuminant D65 defined in ISO 11664-2/CIE S 014-2. The values given by this part of ISO/CIE 11664 may not correlate well with relative perceived colour differences in other viewing conditions
49、. The Euclidean distances are defined by the following formula:uv uv,()=()+()2212(7)whereuu u=10(8)vv v=10(9)and the subscripts 0 (usually the reference) and 1 (usually the test) indicate the two stimuli being compared.4.2 Uniform colour spaceThe CIE 1976 L*u*v* colour space is a three-dimensional, approximately uniform colour space produced by plotting in rectangular coordinates, L*, u*, v*, quantities defined by the following formulae:LfYY* =()116 16n(10)uLuu*=( )1
