作者:标准资料网 时间:2024-05-09 19:14:57   浏览:9329   来源:标准资料网

【英文标准名称】:StandardPracticeforComputingtheColorsofObjectsbyUsingtheCIESystem
【原文标准名称】:用CIE体系估计物体颜色的标准实施规程
【标准号】:ASTME308-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E12.04
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:CIELAB;CIELUV;CIEsystem;colorcoordinates;tristimulusintegration;tristimulusvalues;tristimulusweightingfactors;Instrumentalmeasurement--color/light;Spectraldata--paints/relatedcoatings;Spectrophotometry--absorption;CIEcolor-scalesystem
【摘要】:TheCIEcolorimetricsystemsprovidenumericalspecificationsthataremeanttoindicatewhetherornotpairsofcolorstimulimatchwhenviewedbyaCIEstandardobserver.TheCIEcolorsystemsarenotintendedtoprovidevisuallyuniformscalesofcolordifferenceortodescribevisuallyperceivedcolorappearances.ThispracticeprovidesforthecalculationoftristimulusvaluesX,Y,Zandchromaticitycoordinatesx,ythatcanbeuseddirectlyforpsychophysicalcolorstimulusspecificationorthatcanbetransformedtonearlyvisuallyuniformcolorscales,suchasCIELABandCIELUV.Uniformcolorscalesarepreferredforresearch,productioncontrol,color-differencecalculation,colorspecification,andsettingcolortolerances.Theappearanceofamaterialoranobjectisnotcompletelyspecifiedbythenumericalevaluationofitspsychophysicalcolor,becauseappearancecanbeinfluencedbyotherpropertiessuchasglossortexture.1.1ThispracticeprovidesthevaluesandpracticalcomputationproceduresneededtoobtainCIEtristimulusvaluesfromspectralreflectance,transmittance,orradiancedataforobject-colorspecimens.1.2ProceduresandtablesofstandardvaluesaregivenforcomputingfromspectralmeasurementstheCIEtristimulusvaluesX,Y,Z,andchromaticitycoordinatesx,yfortheCIE1931standardobserverandX10,Y10,Z10andx10.y10fortheCIE1964supplementarystandardobserver.1.3StandardvaluesareincludedforthespectralpowerofsixCIEstandardilluminantsandthreeCIErecommendedfluorescentilluminants.1.4Proceduresareincludedforcasesinwhichdataareavailableonlyinmorelimitedwavelengthrangesthanthoserecommended,orforameasurementintervalwiderthanthatrecommendedbytheCIE.ThispracticeisapplicabletospectraldataobtainedinaccordancewithPracticeE1164with1-,5-,10-,or20-nmmeasurementinterval.1.5Proceduresareincludedforcasesinwhichthespectraldataare,andthoseinwhichtheyarenot,correctedforbandpassdependence.Fortheuncorrectedcases,itisassumedthatthespectralbandpassoftheinstrumentusedtoobtainthedatawasapproximatelyequaltothemeasurementintervalandwastriangularinshape.Thesechoicesarebelievedtocorrespondtothemostwidelyusedindustrialpractice.1.6ThispracticeincludesproceduresforconversionofresultstocolorspacesthatarepartoftheCIEsystem,suchasCIELABandCIELUV(3).EquationsforcalculatingcolordifferencesintheseandothersystemsaregiveninPracticeD2244.1.7ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.8Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A26
【国际标准分类号】:17_180_20
【页数】:34P.;A4
【正文语种】:英语