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ID:5456372
大小:931.00 KB
页数:33页
时间:2017-11-15
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1、奇菱科技股份有限公司TheLightisarangeofcolorsCosmicraysXraysUVIRRadiowaves1st.dimensionofcolor=thehue2nd.dimensionofcolor=thelightness3rd.dimensionofcolor=thesaturationColoristridimensional3.Saturation2.Lightness1.HueCIE-L*a*b*SYSTEMreducedto2dimensionsSpectralenergydistributionofstandardilluminantsENE
2、RGYAD65400700LightsourceandtheinfluenceonthecolorL*=43.2C*=54.5h?=32.5L*=43.5C*=53.2h?=28.5x=AER%ExR%=xD65R%EExR%EnergydistributionReflectancecurveofthepatternEnergymultipliedbythereflectanceLightsourceandtheinfluenceonthecolorThehumaneye3typesofspectralsensitivecellswhoreactonRGBRGBColourmat
3、chingfunctionsXXYZ400700500600SpectralsensitivityofthehumaneyeLightreflectionApartoflightisabsorbedandtransformedintoheatAbsorbingpartReflectancecurveReflectingpart400500600700%IlluminationEyeobject3elementsarenecessarytoseeacolor:thelight,theobjectandtheeyeBrainHumaneye3typesofconesontheretina
4、EyeXYZTristimulusmethodNumericalvaluesMicroprocessorReceptorsection3filterswhocorrespondtothehumaneyeTheseinstrumentsareonlysuitableforqualitycontrolwithlimitedfeaturesmainlycolourdifferencesSpectrophotometricmethodCurveNumericalvaluesMicroprocessorReceptorsectionReceptorsection:multiplesensors
5、sensitivetoaparticularwavelengthHighprecisionindispensableforabsolutcolordatafortherecipecalculationandmetamerismproblemsXYZXYZXX=IlluminantSpectralreflectanceofthepatternTristimulusvaluesColormatchingfunctionsTristimulusvaluesX=ExRxXY=ExRxYZ=ExRxZXYZREThesevaluescanbemathematically
6、transformedintoL*a*b*valuesStandardProductionL*+a*-a*-b*+b*Colorspace-L*TheDeltaL*inthecolorspaceisthedifferencebetweentheproductionandthestandardontheverticalLightnessaxisStandardProductiona*+a*-a*-b*+b*TheDeltaa*inthecolorspaceisthedifferencebetweentheproductionandthestandardonthehorizont
7、alRed(+a*)Green(-a*)AxisColorspace-a*StandardProductionb*+a*-a*-b*+b*Colorspace-b*TheDeltab*inthecolorspaceisthedifferencebetweentheproductionandthestandardonthehorizontalyellow(+b*)blue(-b*)AxisStandardProductionE*abT
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