奇菱科技股份有限公司奇菱科技股份有限公司TheLightisarangeofcolorsCosmic

raysXraysUVIRRadiowavesTheLightisarangeofcolors1st.dimensionofcolor

=thehue1st.dimensionofcolor

=the2nd.dimensionofcolor=thelightness2nd.dimensionofcolor3rd.dimensionofcolor

=thesaturation3rd.dimensionofcolor

=theColoristridimensional3.Saturation2.Lightness1.HueColoristridimensional3.SatuCIE-L*a*b*SYSTEMreducedto2dimensionsCIE-L*a*b*SYSTEMreducedtoSpectralenergydistributionofstandardilluminantsENERGYAD65400700SpectralenergydistributionoLightsourceandtheinfluenceonthecolorL*=43.2C*=54.5h?=32.5L*=43.5C*=53.2h?=28.5Lightsourceandtheinfluencex=AER%ExR%=xD65R%EExR%EnergydistributionReflectancecurveofthe

patternEnergymultiplied

bythereflectanceLightsourceandtheinfluenceonthecolorx=AER%ExR%=xD65R%EExR%EnergyThehumaneye3typesofspectralsensitivecellswhoreactonRGBRGBThehumaneye3typesofspectrColourmatchingfunctionsXXYZ400700500600SpectralsensitivityofthehumaneyeColourmatchingfunctionsXXYZ4LightreflectionApartoflightisabsorbedandtransformedintoheatLightreflectionApartoflighAbsorbingpartReflectancecurveReflectingpart400500600700%AbsorbingpartReflectancecurvIlluminationEyeobject3elementsarenecessarytoseeacolor:thelight,theobjectandtheeyeIlluminationEyeobject3elementBrainHumaneye3typesofconesontheretinaEyeBrainHumaneye3typesofconesXYZTristimulusmethodNumericalvaluesMicroprocessorReceptorsection3filterswhocorrespond

tothehumaneyeTheseinstrumentsareonlysuitableforqualitycontrolwithlimitedfeaturesmainlycolourdifferencesXYZTristimulusmethodNumericalSpectrophotometricmethodCurveNumericalvaluesMicroprocessorReceptorsectionReceptorsection:multiplesensorssensitivetoaparticularwavelengthHighprecisionindispensableforabsolutcolordatafortherecipecalculationandmetamerismproblemsXYZSpectrophotometricmethodCurvX

Y

Z

XX=IlluminantSpectralreflectanceofthepatternTristimulusvaluesColormatching

functionsTristimulusvaluesX=ExRxX

Y=ExRxY

Z=ExRxZ

XYZREThesevaluescanbemathematicallytransformedintoL*a*b*valuesXYZXX=IlluminantSpectralreStandardProductionL*+a*-a*-b*+b*Colorspace-L*TheDeltaL*inthecolorspaceisthedifferencebetweentheproductionandthestandardontheverticalLightnessaxisStandardProductionL*+a*-a*-bStandardProductiona*+a*-a*-b*+b*TheDeltaa*inthecolorspaceisthedifferencebetweentheproductionandthestandardonthehorizontalRed(+a*)Green(-a*)AxisColorspace-a*StandardProductiona*+a*-a*-bStandardProductionb*+a*-a*-b*+b*Colorspace-b*TheDeltab*inthecolorspaceisthedifferencebetweentheproductionandthestandardonthehorizontalyellow(+b*)blue(-b*)AxisStandardProductionb*+a*-a*-bStandardProductionE*abTheDeltaEinthecolorspacecorrespondstothetotalcolordifferenceusingthepythagorasmathematicallawforcalculation.TheDeltaEdoes

notshowthedirectionofthecolordifference.Forthisreasonitisnot

sufficientforanobjectiveinterpretation.Therefore,thesplittedvaluesDL*,Da*,Db*,DC*,DH*arenecessarytomakeapreciseinterpretation.+a*-a*-b*+b*Colorspace-E*E*abStandardProductionE*abTheDeb*+aa*+bColorspaceL*a*b*StandardProductionb*+aa*+bColorspaceL*a*b*StThemetamerismThemetamerismMetamericpairunderDaylightL*=68.5a*=8.7b*=29.7L*=68.5a*=8.6b*=29.2E=0.5MetamericpairunderDaylightL*MetamericpairunderdifferentilluminationL*=71.2a*=12.8b*=32.8L*=71.1a*=18.7b*=31.8E=6.0MetamericpairunderdifferentPrincipleofmetamerismXX=XX==XXXX=L*=68.5a*=8.6b*=29.2L*=71.2a*=12.8b*=32.8L*=71.1a*=18.7b*=31.8L*=68.5a*=8.7b*=29.7DE=0.5DE=6.0PrincipleofmetamerismXX=XX==CalculationexamplesintheCIE-L*a*b*SystemCalculationexamplesinL*=71.2a*=12.8b*=32.8L*=71.1a*=18.7b*=31.8SampleStandard71.1-71.2=-0.118.7-12.8=5.931.8-32.8=-1.012.82+32.82=35.2StandardSample-0.12+5.92+-1.02=5.918.72+31.82=36.936.9-35.2=1.75.92-(-0.1)2-(-1.7)2=5.7CalculationexamplesintheCIE-L*a*b*SystemL*=71.2L*=71.1SampleStanda塑膠製品顏色管制實務介紹塑膠製品顏色管制實務介紹色差分析及管制辦法課件色板表面狀況不同差異比較色板表面狀況不同差異比較奇菱科技股份有限公司奇菱科技股份有限公司TheLightisarangeofcolorsCosmic

raysXraysUVIRRadiowavesTheLightisarangeofcolors1st.dimensionofcolor

=thehue1st.dimensionofcolor

=the2nd.dimensionofcolor=thelightness2nd.dimensionofcolor3rd.dimensionofcolor

=thesaturation3rd.dimensionofcolor

=theColoristridimensional3.Saturation2.Lightness1.HueColoristridimensional3.SatuCIE-L*a*b*SYSTEMreducedto2dimensionsCIE-L*a*b*SYSTEMreducedtoSpectralenergydistributionofstandardilluminantsENERGYAD65400700SpectralenergydistributionoLightsourceandtheinfluenceonthecolorL*=43.2C*=54.5h?=32.5L*=43.5C*=53.2h?=28.5Lightsourceandtheinfluencex=AER%ExR%=xD65R%EExR%EnergydistributionReflectancecurveofthe

patternEnergymultiplied

bythereflectanceLightsourceandtheinfluenceonthecolorx=AER%ExR%=xD65R%EExR%EnergyThehumaneye3typesofspectralsensitivecellswhoreactonRGBRGBThehumaneye3typesofspectrColourmatchingfunctionsXXYZ400700500600SpectralsensitivityofthehumaneyeColourmatchingfunctionsXXYZ4LightreflectionApartoflightisabsorbedandtransformedintoheatLightreflectionApartoflighAbsorbingpartReflectancecurveReflectingpart400500600700%AbsorbingpartReflectancecurvIlluminationEyeobject3elementsarenecessarytoseeacolor:thelight,theobjectandtheeyeIlluminationEyeobject3elementBrainHumaneye3typesofconesontheretinaEyeBrainHumaneye3typesofconesXYZTristimulusmethodNumericalvaluesMicroprocessorReceptorsection3filterswhocorrespond

tothehumaneyeTheseinstrumentsareonlysuitableforqualitycontrolwithlimitedfeaturesmainlycolourdifferencesXYZTristimulusmethodNumericalSpectrophotometricmethodCurveNumericalvaluesMicroprocessorReceptorsectionReceptorsection:multiplesensorssensitivetoaparticularwavelengthHighprecisionindispensableforabsolutcolordatafortherecipecalculationandmetamerismproblemsXYZSpectrophotometricmethodCurvX

Y

Z

XX=IlluminantSpectralreflectanceofthepatternTristimulusvaluesColormatching

functionsTristimulusvaluesX=ExRxX

Y=ExRxY

Z=ExRxZ

XYZREThesevaluescanbemathematicallytransformedintoL*a*b*valuesXYZXX=IlluminantSpectralreStandardProductionL*+a*-a*-b*+b*Colorspace-L*TheDeltaL*inthecolorspaceisthedifferencebetweentheproductionandthestandardontheverticalLightnessaxisStandardProductionL*+a*-a*-bStandardProductiona*+a*-a*-b*+b*TheDeltaa*inthecolorspaceisthedifferencebetweentheproductionandthestandardonthehorizontalRed(+a*)Green(-a*)AxisColorspace-a*StandardProductiona*+a*-a*-bStandardProductionb*+a*-a*-b*+b*Colorspace-b*TheDeltab*inthecolorspaceisthedifferencebetweentheproductionandthestandardonthehorizontalyellow(+b*)blue(-b*)AxisStandardProductionb*+a*-a*-bStandardProductionE*abTheDeltaEinthecolorspacecorrespondstothetotalcolordifferenceusingthepythagorasmathematicallawforcalculation.TheDeltaEdoes

notshowthedirectionofthecolordifference.Forthisreasonitisnot

sufficientforanobjectiveinterpretation.Therefore,thesplittedvaluesDL*,Da*,Db*,DC*,DH*arenecessarytomakeapreciseinterpretation.+a*-a*-b*+b*Colorspace-E*E*abStandardProductionE*abTheDeb*+aa*+bColorspaceL*a*b*StandardProductionb*+aa*+bColorspaceL*a*b*StThemetamerismThemetamerismMetamericpairunderDaylightL*=68.5a*=8.7b*=29.7L*=68