色差分析及管制办法

《色差分析及管制办法》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、奇菱科技股份有限公司TheLightisarangeofcolorsCosmicraysXraysUVIRRadiowaves1st.dimensionofcolor=thehue2nd.dimensionofcolor=thelightness3rd.dimensionofcolor=thesaturationColoristridimensional3.Saturation2.Lightness1.HueCIE-L*a*b*SYSTEMreducedto2dimensionsSpectralenergydistributionofstandardilluminantsENE

2、RGYAD65400700LightsourceandtheinfluenceonthecolorL*=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=ExRxXY=ExRxYZ=ExRxZXYZREThesevaluescanbemathematically

6、transformedintoL*a*b*valuesStandardProductionL*+a*-a*-b*+b*Colorspace-L*TheDeltaL*inthecolorspaceisthedifferencebetweentheproductionandthestandardontheverticalLightnessaxisStandardProductiona*+a*-a*-b*+b*TheDeltaa*inthecolorspaceisthedifferencebetweentheproductionandthestandardonthehorizont

7、alRed(+a*)Green(-a*)AxisColorspace-a*StandardProductionb*+a*-a*-b*+b*Colorspace-b*TheDeltab*inthecolorspaceisthedifferencebetweentheproductionandthestandardonthehorizontalyellow(+b*)blue(-b*)AxisStandardProductionE*abT