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1、名师李涛老师主讲photoshopcs2讲课的笔记（TeacherLiTaolecturesnotesonPhotoshopCS2lectures）I.colorpatterns1.colormode,HSB:color,saturation,lightness,isbasedonthecolorofvisualreflectionH.colorimage:360degrees,startingfrom0,indicatingpurered,360degreesalsoexpresspurered,blackandwhitecolorlessimageS.satur
2、ation:100%meansfullcolorpurityB.brightness:denoteslightandshade,100%meansbright,andblackat02.colorRGBcolormodelRGB:,isbasedonthecolor,butalsofortheadditivemodel,namelythetwolightcoincidenceR.Red:Red,0~255order,atotalof256colorsG.green:Green,0~255steps,256colorsinallB.blue:Blue,0~255ste
3、ps,256colorsinallThethreeareputtogethertoindicateacolor:R:255,G:0,B:0meansred;R:0,G:255,B:0meansgreenSpecial:RGB:255255255standsforwhite;RGB:000denotesblack3.CMYK:bluemagentayellowblackcolorpatternisprinted,thecolorofthepaintisbasedonsubtractivepattern,bothtwodimcoincidenceC.M.Ycyan,ma
4、genta,yellow,threecolorsare100%said:threetogethercanbesynthesizedbyothercolors,thefirst3are0%whentheprintingiscolorless,white;but100%whenprintednotpureblack,impurities,soaddingK.blackusedfortheprintingofpureblackAttached:additiveandsubtractivecolorwithoutopposition,equaltoR--CG--M,B--Y
5、graphicsfortheoppositetrianglering,theimageisredlightbluewallwascompletelyabsorbed;accordingtothegreenmagentacolorwallallabsorbed;accordingtotheblueyellowwallswhencompletelyabsorbed;4.colormodeLabbrightness;achannelfromredtogreen;Bchannelfrombluetoyellow.Thetwocomponentsarechangedfrom-
6、128to127;whena=0,b=0andL=100displaygray,Baise,blackL=0;ifyouhavetousetheLabmodeltoexpressthecolor,thenRcolorvalueis:L=54,a=81,b=70;Gcolorvalue:L=88,a=-79,b=81;Bcolorvalueis:L=29,a=68,b=-112;Ccolorvalue:L=62,a=-31,b=-64;Mcolorvalue:L=48,a=83,b=-3;Ycolorvalue:L=94,a=-14,b=100.Broadlyspea
7、king,themostcompleteexpressionofcolorrangeistheLabpattern,followedbytheRGBpattern,andthenarrowestistheCMYKpattern.Thatistosay,theLabpatterndefinesthemostcolorsandhasnothingtodowithlightandequipment,andtheprocessingspeedisasfastastheRGBmodel,severaltimesfasterthantheCMYKmodel.Therefor
