IEC_TR_62977-3-2-2016.pdf

IEC TR 62977-3-2 Edition 1.0 2016-01 TECHNICA L REPOR T Electronic display dev ices Part 3-2:Ev aluation of optical characteristics Mura IEC TR 62977-3-2:2016-01(en)colourinsideInternational Electrotechnical Commission THIS PUBLICA TION IS COPYRIGHT PROTECTED Copyright 2016 IEC,Geneva,Switzerland All rights reserved.Unless otherwise specified,no par t of this publication may be reproduced or utilized in any for m or by any means,electronic or mechanical,including photocopying and microfilm,without per mission in writing fr om either IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional r ights to this publication,please contact the address below or your local IEC member National Committee for further infor mation.IEC Centr al Office Tel.:+41 22 919 02 11 3,rue de Varemb Fax:+41 22 919 03 00 CH-1211 Geneva 20 infoiec.ch Switzerland www.iec.ch About t he IEC The International Electr otechnical Commission(IEC)is the leading global organization that prepar es and publishes Inter national Standards for all electr ical,electronic and related technologies.A bout IEC publications The technical content of IEC publications is kept under constant review by the IEC.Please make sur e that you have the latest edition,a cor rigenda or an amendment might have been published.IEC Cat alogue-webstore.iec.ch/cat alogue The stand-alone application for consulting the entire bibliographical information on IEC International Standards,Technical Specifications,Technical R eports and other documents.A v ailable for PC,Mac OS,A ndroid Tablets and iPad.IEC publications search-w w w.iec.ch/searchpub The adv anced search enables to find IEC publications by a variety of criteria(reference number,text,technical committee,).It also gives information on projec ts,replaced and withdrawn publications.IEC Just Published-webstore.iec.ch/justpublished Stay up to date on all new IEC publications.Just Published details all new publications released.A v ailable online and also once a month by email.Elect ropedia-w w w.elect ropedia.org The worlds leading online dic tionary of elec tronic and electrical terms containing 20 000 terms and definitions in English and French,with equiv alent terms in 15 additional languages.Also known as the International Electrotechnical Vocabulary (IEV)online.IEC Glossar y-st d.iec.ch/glossary 65 000 elec trotechnical terminology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002.Some entries hav e been collected from earlier publications of IEC TC 37,77,86 and CISPR.IEC Customer Service Cent re-webstore.iec.ch/csc If y ou wish to giv e us y our feedback on this publication or need further assistance,please contact the Customer Serv ice Centre:csciec.ch.International Electrotechnical Commission IEC TR 62977-3-2 Edit ion 1.0 2016-01 TECHNICA L R EPOR T Electronic display dev ices Part 3-2:Ev aluation of optical characteristics Mura INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 31.120;31.260 ISBN 978-2-8322-3118-0 R egist er ed tr ademar k of t he Int er national Electr ot echnical Commission Warning!Make sure that you obtained this publication from an authorized distributor.colourinsideInternational Electrotechnical Commission 2 IEC TR 62977-3-2:2016 IEC 2016 CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references.7 3 Terms and definitions.7 4 Standard measuring conditions.8 4.1 Standard measuring conditions.8 4.1.1 Standard measuring environmental conditions.8 4.1.2 Standard measuring darkroom conditions.8 4.2 Light measuring device(LMD).8 4.3 Measuring setup.9 4.4 Test signal.9 4.5 Measuring conditions.10 5 Standard evaluation method.10 5.1 Measurement data processing method.10 5.2 Measurement data processing flow.10 5.2.1 General.10 5.2.2 Median filter process.11 5.2.3 Transformation to opponent colour space from CIE XYZ.12 5.2.4 Convolution with the contrast sensitivity function(CSF)of the human visual system.12 5.2.5 Transformation to CIE XYZ from the opponent colour space.12 5.2.6 Transformation to CIELAB from CIE XYZ.12 5.2.7 a*correction.13 5.3 Mura evaluation method.13 5.3.1 General.13 5.3.2 Lightness mura evaluation.13 5.3.3 Chroma mura evaluation.15 5.3.4 Mura evaluation.16 5.3.5 Measurement report.16 6 Actual example.17 6.1 General.17 6.2 Evaluation objects.17 6.3 Subjective evaluation.17 6.4 Evaluation by the method indicated inthis document using apparatus.18 6.5 Correlation between subjective evaluation and mura evaluation value.19 Annex A(informative)S-CIELAB model.20 A.1 General.20 A.2 S-CIELAB model.20 A.3 Spatial sensitivity function model(two-dimensional CSF model).20 Annex B(informative)Type of mura.24 B.1 General.24 B.2 Classification of mura.24 Annex C(informative)Use case of a mura evaluation value.26 C.1 General.26 International Electrotechnical Commission IEC TR 62977-3-2:2016 IEC 2016 3 C.2 Example of a use case