基本信息
| 标准名称： | 大中孔支承板 |
| 中标分类： |
机械 >>
工艺装备 >>
组合卡具 |
| 替代情况： | HB 1564-75 |
| 发布日期： | 1987-04-08 |
| 实施日期： | 1987-07-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 4页 |
适用范围
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前言
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引用标准
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所属分类： 机械 工艺装备 组合卡具
【英文标准名称】:StandardPracticeforComputingtheColorsofObjectsbyUsingtheCIESystem
【原文标准名称】:用CIE系统计算物体颜色的标准实施规程
【标准号】:ASTME308-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:颜色;光学;试验
【英文主题词】:CIELAB;CIELUV;CIEsystem;colorcoordinates;tristimulusintegration;tristimulusvalues;tristimulusweightingfactors
【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).EquationsforcalculatingcolordifferencesintheseandothersystemsaregiveninPracticeD2244.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse
【中国标准分类号】:A42;A26
【国际标准分类号】:17_180_20
【页数】:34P.;A4
【正文语种】: