sRGB

100/PT61966(PL)34ForIECuseonly1998-05-28INTERNATIONALELECTROTECHNICALCOMMISSIONTECHNICALCOMMITTEENO.100:AUDIO,VIDEOANDMULTIMEDIASYSTEMSANDEQUIPMENTProjectTeam61966:ColourMeasurementandManagementinMultimediaSystemsandEquipment---------------------------------------------IEC/4WD61966-2-1:ColourMeasurementandManagementinMultimediaSystemsandEquipment-Part2-1:DefaultRGBColourSpace-sRGBThisdocument,the4WDfor2CDofIEC61966-2-1,waspreparedtakingintoaccountthefollowingdocuments:z100/67/CD:Colourmeasurementandmanagementinmultimediasystemsandequipment-Part2.1:DefaultRGBcolourspace-sRGBz100/PT61966(PL)28:Reportfromthe4thphysicalmeetinginDerby,UK,on1998-05-14/15z100/PT61966(PL)32:AnnextoCompilationofCommentson100/67/CD:sRGBThisdocumentsupersedesthe3WD100/PT61966(PL)16andwillbesenttotheSecretariatforitsconsiderationtopublishasacommitteedraftforvote(CDV).WhenanInternationalStandardwillbeestablished,thestableperiodofthreeyearsissuggested.19662.1©IEC:1998–18–INTERNATIONALELECTROTECHNICALCOMMISSIONCOLOURMANAGEMENTINMULTIMEDIASYSTEMS-Part2:ColourManagement,Part2.1:DEFAULTRGBCOLOURSPACE-sRGBTABLEOFCONTENTS1GENERAL.................................................................................................................331.1Introduction......................................................................................................331.2Scope..............................................................................................................441.3NormativeReferences......................................................................................441.4Definitions........................................................................................................552REFERENCECONDITIONS......................................................................................662.1ReferenceDisplayConditions...........................................................................662.2ReferenceViewingConditions..........................................................................672.3ReferenceObserverConditions........................................................................673ENCODINGCHARACTERISTICS..............................................................................773.1Introduction......................................................................................................773.2TransformationfromRGBvaluesto1931CIEXYZvalues................................773.3Transformationfrom1931CIEXYZvaluestoRGBvalues................................7819662.1©IEC:1998–28–INTERNATIONALELECTROTECHNICALCOMMISSIONCOLOURMANAGEMENTINMULTIMEDIASYSTEMS-Part2:ColourManagement,Part2.1:DEFAULTRGBCOLOURSPACE–sRGBFOREWORD1)TheIEC(InternationalElectrotechnicalCommission)isaworldwideorganisationforstandardisationcomprisingallnationalelectrotechnicalcommittees(IECNationalCommittees).TheobjectoftheIECistopromoteinternationalco-operationonallquestionsconcerningstandardisationintheelectricalandelectronicfields.Tothisendandinadditiontootheractivities,theIECpublishesInternationalStandards.Theirpreparationisentrustedtotechnicalcommittees;anyIECNationalCommitteeinterestedinthesubjectdealtwithmayparticipateinthispreparatorywork.International,governmentalandnon-governmentalorganisationsliaisingwiththeIECalsoparticipateinthispreparation.TheIECcollaboratescloselywiththeInternationalOrganisationforStandardisation(ISO)inaccordancewithconditionsdeterminedbyagreementbetweenthetwoorganisations.2)TheformaldecisionsoragreementsoftheIEContechnicalmattersexpress,asnearlyaspossible,aninternationalconsensusofopinionontherelevantsubjectssinceeachtechnicalcommitteehasrepresentationfromallinterestedNationalCommittees.3)Thedocumentsproducedhavetheformofrecommendationsforinternationaluseandarepublishedintheformofstandards,technicalreportsorguidesandtheyareacceptedbytheNationalCommitteesinthatsense.4)Inordertopromoteinternationalunification,IECNationalCommitteesundertaketoapplyIECInternationalStandardstransparentlytothemaximumextentpossibleintheirnationalandregionalstandards.AnydivergencebetweentheIECStandardandthecorrespondingnationalorregionalstandardshallbeclearlyindicatedinthelatter.5)TheIECprovidesnomarkingproceduretoindicateitsapprovalandcannotberenderedresponsibleforanyequipmentdeclaredtobeinconformitywithoneofitsstandards.6)AttentionisdrawntothepossibilitythatsomeoftheelementsofthisInternationalStandardmaybethesubjectofpatentrights.TheIECshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.InternationalStandardIEC61966hasbeenpreparedbyprojectteam61966:Colourmeasurementandmanagementinmultimediasystemsandequipment,ofIECtechnicalcommitteeTC100:Audio,VideoandMultimediaSystemsandEquipment.ThetextofthisstandardisbasedonFDISReportonvotingXXX/FDISXXX/RVDFullinformationonthevotingfortheapprovalofthisstandardcanbefoundinthereportonvotingindicatedintheabovetable.19662.1©IEC:1998–38–INTERNATIONALELECTROTECHNICALCOMMISSIONCOLOURMANAGEMENTINMULTIMEDIASYSTEMS-Part2:ColourManagement,Part2.1:DEFAULTRGBCOLOURSPACE–sRGB1GENERAL1.1Introduction