Color Format Conversion between RGB， YUV， YCbCr and YPbPr.pdf

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7、ImprintColorConversionThispagecontainsthedifferentequationsforconvertingoneoftheluminance/chrominancebasedcolorformats(YUV,YCbCrandYPbPr)intotheRGBcolorformatandviceversa.YUV-

8、RGBColorFormatConversionYCbCr-RGBColorFormatConversionYPbPr-RGBColorFormatConversionSeealsothecolorformatpagetogetbasicinformationaboutthedifferentcolorformats.YUV-RGBColorFormatConversionTheYUVcolorformatisusedonlyforanalogPALoranalogNTSCvideo-notforanydigitalvideoformat.Thefollowingequati

9、ondescribestheconversionofanRGBcolorintotheYUVcolorformat:ThisistheinversematrixtogettheRGBcomponentsoutoftheYUVcolor:YCbCr-RGBColorFormatConversionFordigitalcomponentvideothecolorformatYCbCrisused.ForstandarddefinitionTVapplications(SDTV)thefollowingequationdescribesthecolorconversionfromR

10、GBtoYCbCr(accordingtoITU-RBT.601):TorecoveranRGBcolorfromaYCbCrcolor,thefollowinginversematrixisused:equasys.de/colorconversion.html1/42011-7-4equasys-ColorFormatConversio…Thepossiblerangeofvaluesforchrominanceandluminancereservessomefootroomandheadroom,whichisnecessarytoprovidesomespacefor

11、overshooting,e.g.incombinationwithanalogvideoequipment.ForcomputerbasedapplicationsusingRGBandYCbCrcolorformats,inmanycasesthecompletepossiblerangeof8bitisused,withoutprovidingafootroomorheadroom.Typically,thisfull-rangecolorformatisusedforJPEGimages.TheconversionofRGBcolorsintofull-rangeYC

12、bCrcolorsisdescribedbythefollowingequation:Theotherwayround,toconvertafull-rangeYCbCrcolorintoRGBisdescribedbythefollowingequation:ForhighdefinitionTV(HDTV),differentcoefficientsareused.ThepossiblerangeofvaluesisidenticaltotheSDTV,toprovidethenecessaryfootroomandheadroom.Thefollowingequatio

13、ndescribesthecolorconversionfromRGBtoYCbCrforHDTV(accordingtoITU-RBT.709):ThisisthecorrespondinginversematrixtogettheRGBcolorcomponentsoutofaYCbCrcolor:YPbPr-RGBColorFormatConversionThefollowingequationsdescribetheconversionfromRGBtoYPbPrcolorformatforco