1、December 2016 English price group 10No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 17.180.20!%b?“2596328www.din.de
2、DIN EN ISO 11664-6Colorimetry Part 6: CIEDE2000 Colourdifference formula (ISO/CIE 116646:2014);English version EN ISO 116646:2016,English translation of DIN EN ISO 11664-6:2016-12Farbmetrik Teil 6: CIEDE2000 Formel fr den Farbabstand (ISO/CIE 116646:2014);Englische Fassung EN ISO 116646:2016,Englisc
3、he bersetzung von DIN EN ISO 11664-6:2016-12Colorimtrie Partie 6: Formule dcart de couleur CIEDE2000 (ISO/CIE 116646:2014);Version anglaise EN ISO 116646:2016,Traduction anglaise de DIN EN ISO 11664-6:2016-12www.beuth.deDocument comprises 14 pagesDTranslation by DIN-Sprachendienst.In case of doubt,
4、the German-language original shall be considered authoritative.12.16 DIN EN ISO 11664-6:2016-12 2 A comma is used as the decimal marker. National foreword This document (EN ISO 11664-6:2016, originally ISO/CIE 11664-6:2014) has been prepared by the International Commission on Ilumination (CIE). Resp
5、onsibility at European level lies with Technical Committee CEN/TC 139 “Paints and varnishes” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was DIN-Normenausschuss Farbe (DIN Standards Committee Colour), Joint Working Committee NA 025-00-02 GA Gemeinschaftsarbei
6、tsausschuss FNF/FNL: Farbmetrik. DIN EN 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 spac
7、e and u, v uniform chromaticity scale diagram Part 6: CIEDE2000 Colour-difference formula The DIN Standard corresponding to the International Standard referred to in this document is as follows: ISO 11664-4 DIN EN ISO 11664-4 National Annex NA (informative) Bibliography DIN EN ISO 11664-4, Colorimet
8、ry Part 4: CIE 1976 L*a*b* Colour space EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11664-6 August 2016 ICS 17.180.20 English Version Colorimetry - Part 6: CIEDE2000 Colour-difference formula (ISO/CIE 11664-6:2014) Colorimtrie - Partie 6: Formule dcart de couleur CIEDE2000 (ISO/CIE 1166
9、4-6:2014) Farbmetrik - Teil 6: CIEDE2000 Formel fr den Farbabstand (ISO/CIE 11664-6:2014) This European Standard was approved by CEN on 15 July 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status
10、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, Germa
11、n). 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,
12、 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, Spain, Sweden, Switzerland, Turkey and Unite
13、d 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 worldwide for CEN national Members. Ref. No. EN I
14、SO 11664-6:2016 ECONTENTS European foreword . 3 Introduction 5 1 Scope 5 2 Normative References 5 3 Definitions, Symbols and Abbreviations 5 4 Reference Conditions .75 Calculation Method . 7 6 Parametric Factors . 10 Annex A (Informative) Three-Component Micro-Spaces . 11 Bibliography .12 DIN EN ISO
15、 11664-6:2016-12 EN ISO 11664-6:2016 (E)2Foreword . 4 European foreword The text of ISO 11664-6:2014 has been prepared by Technical Committee ISO/TC 274 “Light and lighting” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 11664-6:2016 by Technical Commit
16、tee 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 February 2017, and conflicting national standards shall be withdrawn
17、at the latest by February 2017. Attention 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. According to the CEN-CENELEC Internal Regulations, the
18、 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, Italy, Latvia
19、, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 11664-6:2014 has been approved by CEN as EN ISO 11664-6:2016 without any modification. DIN EN ISO 11664-6:
20、2016-12 EN ISO 11664-6:2016 (E)3 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 inte
21、rested 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 Electrotechnica
22、l 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 docu
23、ments 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 responsi
24、ble 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 fo
25、r 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 ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following UR
26、L: Foreword - Supplementary information ISO/CIE 11664-6 was prepared by CIE Technical Committee TC 1-57 of Division 1 Vision and colour. as CIE S 014-6. ISO/CIE 11664 consists of the following parts, under the general title Colorimetry: Part 1: CIE standard colorimetric observers Part 2: CIE standar
27、d 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: CIEDE2000 Colour-difference formula DIN EN ISO 11664-6:2016-12 EN ISO 11664-6:2016 (E)4 Introduction CIE 142-2001. Improvement to
28、 industrial colour-difference evaluation, 2001. CIE S 017/E:2011. ILV: International Lighting Vocabulary, 2011. ISO 11664-4:2008(E)/CIE S 014-4/ E:2007. Joint ISO/CIE Standard: Colorimetry Part 4: 1976 L*a*b* Colour Space, 2008. 3 Definitions, Symbols and Abbreviations For the purposes of this Inter
29、national Standard, the terms and definitions given in CIE S 017/E:2011 (International Lighting Vocabulary), and the following symbols and abbreviations apply. The three-dimensional colour space produced by plotting CIE tristimulus values (X, Y, Z) in rectangular coordinates is not visually uniform,
30、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 the CIE has standardized two more-nearly uniform colour spaces (known as CIELAB an
31、d 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
32、 with the relative perceived size of differences. The purpose of this CIE International Standard is to define one such formula, the CIEDE2000 formula. The Standard is based on CIE Technical Report 142-2001. The formula is an extension of the CIE 1976 L*a*b* colour-difference formula (ISO 11664-4:200
33、8(E)/CIE S 014-4/E:2007) 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. 1 Scope This CIE International Standard s
34、pecifies the method of calculating colour differences according to the CIEDE2000 formula. The Standard is applicable to input values of CIELAB L*, a*, b* coordinates calculated according to ISO 11664-4:2008(E)/CIE S 014-4/E:2007. The Standard may be used for the specification of the colour differenc
35、e 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. The Standard does not apply to
36、 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 Normative References The following referenced documents are indispensable for the application of this document. For dated references, on
37、ly the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. DIN EN ISO 11664-6:2016-12 EN ISO 11664-6:2016 (E)5 L* CIELAB lightness a*, b* CIELAB a*,b* coordinates *abC CIELAB chroma abh CIELAB hue angle L CIEDE2000 lightnes
38、s L arithmetic mean of the CIEDE2000 lightnesses of two colour stimuli a, b CIEDE2000 a, b coordinates C CIEDE2000 chroma C arithmetic mean of the CIEDE2000 chromas of two colour stimuli h CIEDE2000 hue angle h arithmetic mean of the CIEDE2000 hue angles of two colour stimuli G switching function us
39、ed in the modification of a* L CIEDE2000 lightness difference C CIEDE2000 chroma difference h CIEDE2000 hue-angle difference H CIEDE2000 hue difference E00CIEDE2000 colour difference SLlightness weighting function SCchroma weighting function SHhue weighting function T T-function for hue weighting RT
40、rotation function hue dependence of rotation function RCchroma dependence of rotation function kLlightness parametric factor kCchroma parametric factor kHhue parametric factor DIN EN ISO 11664-6:2016-12 EN ISO 11664-6:2016 (E)6 4 Reference Conditions The CIEDE2000 formula is intended to be applicabl
41、e to objects viewed under the following reference conditions: Illumination: source simulating the relative s pectral irradiance of CIE Standard Illuminant D65. Illuminance: 1 000 lx. Observer: normal colour vision. Background field: uniform, neutral grey with L*= 50. Viewing mode: object. Sample siz
42、e: sample pair subtending a visual angle greater than 4. Sample separation: minimum sample separation achieved by placing the sample pair in direct edge contact. Sample colour-difference magnitude: 0 to 5 CIELAB units. Sample structure: homogeneous colour without visually apparent pattern or non-uni
43、formity. When conditions of use deviate appreciably from the reference conditions, parametric factors may be used to correct for the effects of material or experimental variables, as described in Clause 6. NOTE 1 A proposed Technical Report of CIE T C 1-63 “Validity of the Range of CIE DE2000“ w ill
44、 discuss and may show some application limit ations of CIEDE2000 for CIELAB colour differences 5 units and for the CIE 1931 standard colorimetric observer (CIE 2 degree observer). NOTE 2 A proposed Technical Report of CIE T C 1-81 “Validity of Formulae for Predicting Small Colour Differences“ will d
45、iscuss and may show some application limitations of CIEDE2000 for CIELAB colour differences 2 units. 5 Calculation Method All angular quantities in this Standard shall be evaluated in degrees. CIELAB L*, a*, b*, and coordinates of the two samples shall be calculated according to *abCISO 11664-4:2008
46、(E)/CIE S 014-4/E:2007. a2Modified CIELAB coordinates shall be calculated according to equations (1) to (7). *LL (1) (1 ) *aG (2) *bb (3) 221/()Cab (4) DIN EN ISO 11664-6:2016-12 EN ISO 11664-6:2016 (E)7 arctan if 0 and 0arctan 360 if 0 and 0arctan 180 if 090 if 0 and 0270 if 0 and 0babababahbaaab b
47、(5) 0h (6) if 0 and 0awhere 7*ab7*7ab0,5 125CGC(7) and *abC is the arithmetic mean of the values for the two samples of the colour-difference pair. *abCEquation (5) ensures that h is the angular position of the point a, b in the range from 0 to 360 measured from the positive a axis in the a, b plane. In the case where a = b = 0, h is indeterminate and shall be assigned a value of zero as indicated in equation (6). NOTE 1 The L, a, b, C and h values should be used only for the calculation
