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photoshop8 0序列号 时间:2021-02-22 阅读:()
WhiteBalancePhotoshoppluginforcolorcorrectionfile:///C|/Users/Jan/Documents/My%20Websites/PRHomepage/_PDF_White-balance_plugin_tutorial.
htm[01-05-201018:26:13]WhiteBalanceCorrectorPlugin-TutorialBenefitsofthepluginCorrectcolorcastinphotosduetounfortunatelightingconditions.
ManuallyapplydigitalequivalentsofKodak-Wratten78AAto85B+.
AutomodescansthephotoandsetsthecorrectionfilterforanylightsourceAdjustthefiltercolorexactly.
Targetthecorrectiontoanyrangeoflights,midtonesorshadows.
Thewhitebalancefilterpluginworkswiththeseimagemodes(WindowsandMac).
.
.
8&16bit/channel:RGB,CMYK.
TutorialTutorialaspdfBuyplug-insnowProductsoverviewwhitebalancefiltercontrolsThisisthewhitebalanceplug-inscontrolpanel(Mac).
Clickimagetoenlarge.
Thecontrolpanelandpreviewareacanbechangedbydraggingthesides.
1.
Automatic(threedifferentmodes)2.
Filtercolor(incl.
Kodak-Wrattenstandards)3.
Colorpicker4.
Brightnessrange5.
SeveralstandardgraychartsSeeWindowspluginSeeMacpluginDownloadWinplug-insDownloadMacplug-insDownloadtutorialsExample-AutomaticcorrectionofcolorcastThewhitebalancepluginisusefulforglobalortargetedwhitebalancecorrections.
Yougetfullcontroloverthefiltercoloraswellasexposureandmuchmore.
.
.
Anexampleofauto-correction(Auto-Lights)HowtomasterwhitebalanceandremovecolorcastwithourPhotoshoppluginExtremelyversatilewhitebalanceandcolorcastfilter.
Youcansetanyfiltercolorimaginableandanyspecialbehavioronthelight.
EitherselecttheequivalentsofWrattenfiltersorusegraychartssuchasWhiBalorMacbethtocorrectexposureandwhitebalance.
Youcantargetcorrectiontoanyrangeofbrightnessvaluesandthuscorrectlocalcolorcast.
Thepluginhasthreeautomodes.
Manymoreoptions.
.
.
PowerRetouchePhotoshopplug-insarealsoforPaintShopPro,CorelDraw,Illustrator,Fireworksandothergraphicsoftwareorphotosoftwareforphotoediting,retouchingandrestoration(Mac&Win)seelistWhiteBalancePhotoshoppluginforcolorcorrectionfile:///C|/Users/Jan/Documents/My%20Websites/PRHomepage/_PDF_White-balance_plugin_tutorial.
htm[01-05-201018:26:13]WhatisWhiteBalanceandColorCastPhotoslookbrownishwhentakenwitharegulardaylightfilminartificiallightorincandlelight.
Oftenyouhavemixeddaylightandincandescentlightandjustwanttoadjustthetone.
Ormaybetheoutdoorslightisextremeandneedscorrection-forexampleyoumighthaveaheavyblue-toneinascenewithabrightbluesky.
Theworstscenarioiswhenyouhavetophotographinamixtureoffluorescentlightandtungstenwithoutanydaylight.
Theexampletotherightisonesuchinstanceandshowsthecharacteristicstronggreencast.
ItwasfilteredwiththeAuto-Lightsmethod.
Photographersplaceabluefilterbeforethelenswhentakingphotoswithadaylightfilminartificiallight.
TypicallyKB12(Wratten80B),butsometimesitneedstobemoreblue,likeifyoutakepicturesatcandlelight,whereyouwillneedKB20(Wratten78AA).
TheWhite-Balanceplugincancorrectanydiscolorationfromcoloredortonedlight.
IthaspresetsforstandardfiltersKB20-KR20(Wratten78AA-85B+).
Inadditionyoucanadjustthecolorofthesepresetfiltersandcreateevenstrongerfiltersifneedbe.
Automodescalibratesanyfiltercolorforwhitebalancecorrection.
Thisisidealforthenotoriouslydifficultcombinationsoffluorescentlightswithotherlightsources.
Therearethreeautomodesdesignedtohandlevariouscolorcastsituations.
Auto-lightsisthemostusefulone.
Itisalsocustomarytophotographachartofreferencecolorpatchesalongwithyourpicture.
PowerRetoucheWhiteBalanceCorrectorincorporatesthemostimportantsuchcharts(Kodak,GretagMacbeth,WhiBal).
MethodsTheWhiteBalanceCorrectorofferstenmethodsforwhitebalancecorrection.
Youchoosebetweenthemfromthemenu.
Threeautomodesdesignedtosuitthreetypicalcolorcastproblems.
OnemethodforapplyingdigitalequivalentsofstandardWrattenfilters.
Alsoforcreatinganyfiltercoloryoumayfancy.
Onemethodforpickingthecolorofsomebrightlylitcoloredobjectinthepictureandsettingacorrectionfilterfromthat.
Usefulifyourbrightestobjectshaveastrongcolor.
Fivemethodsforpickinggraysfromdifferentcolorrenditionchartsthatphotographerstypicallyphotographintotheirimages.
CommonControls:Exposure&RetouchLevelsExposureAutoExposureOffsetBlackPointAlertsRetouchLevelsAllmethodshavethesetwocontrolgroupsincommon.
ExposureStopsiscalibratedfromaFujichartofstandardsandusesthesamealgorithmasexposurecorrectioninourBWStudioplugin.
PleaseconsultthepageaboutthisfiltertoseetheFujichartandcomparisonswiththefiltersresults.
Youwillfindtheyareidentical.
AutoExposurewillmaketheplug-indoautomaticexposurecorrection.
Youcanstillusetheothersliderstoadjusttheimage.
OffsetandBlackPoint.
Offsetsimplymakestheentireimagebrighterordarker.
BlackPointpullsthedarkstowardsblack.
Theyareanicecoupleasyoucanuseoffsettosettheimageswhitepointandthenstretchthedarkstosettheblackpoint.
Alternativelyyoucanuseoffsettoreachblackandthenusetheexposurecontroltoreachnearwhite.
UsetheAlertsasanaidtosetexposure/offsetandblackpoint,orasahelptoavoidoverexposingtheimage.
Areasintheimagethatreachorclippurewhitewillbecoloredinthepreview.
Likewise,areasthatreachorclippureblackwillbecolored.
Youcanchangethecolorsofthemasksbyclickinginthecoloredrectangles.
WhiteBalancePhotoshoppluginforcolorcorrectionfile:///C|/Users/Jan/Documents/My%20Websites/PRHomepage/_PDF_White-balance_plugin_tutorial.
htm[01-05-201018:26:13]Lights,midtones,darks.
Thisdeterminesthestrengthofthefilterinthethreedifferentbrightnesslevels.
Thismeansyoucanapplyafilter,forexample,fullstrengthtothemidtones,lessstrengthtothelightsandstilllessinthedarks.
AdjustFiltercolorOrange-CyanYellow-VioletGreen-MagentaFiltercolorColorpickerAllmethods,excepttheonesforpickinggraysoncolorrenditioncharts,allowyoutoadjustorchangethefiltercolor.
InsteadofthecommonRGBcontrols(red,green,blue)wedecidedtoimplementthreemoreusefulsliders:Orange-Cyan,Yellow-VioletandGreen-Magenta.
Inadditionthereisaslidertocontroltheintensityoftheautofilter,calculatedbytheplug-in.
TheOrange-Cyanslideriscalibratedtomatchstandardfiltersforcorrectionofincandescentlightordaylight.
TheYellow-Violetslideriscalibratedsothatthevioletrangematchesfiltersforcommonmixturesofhalogenortungstenandfluorescentlight.
TheGreen-Magentaslideriscalibratedsothatthemagentarangematchesfiltersforcommonfluorescentlights(thisisactuallyverydifficult,becausefluorescentlightcomesinnumerousvarieties).
Thelongcoloredrectangleshowsthecurrentfiltercolor.
Clickthelongcoloredrectangletogetastandardcolorpickeryoucanselectafiltercolorfromortogetmoreoptionstoadjustthefiltercolor.
Notallcolorsthatcanbepickedwillfallwithintherangeofpossiblefilters,sothepluginmayinsomecaseschangethepickedcolortotheclosestpossiblefiltercolor.
AdjustFiltercolor-CorrectionFilters(Wratten)IfyouselectthemethodCorrectionFilters-Wratten,thenyouwillbepresentedwithanextraslidertopickdigitalequivalentsofcommonWrattencorrectionfiltersfordaylightandincandescentlight.
ThesliderusestheEuropeanB&Wnomenclaturesothat-3isequaltofilterKB3,+12equaltoKR12,etc.
BelowthesliderisstatedtheequivalentWrattenfilters.
Thedisplayedfiltercolor(intherectangle)mayappearpalerthanthephysicalglassorgelatinfilterdoestotheeye.
TheequivalentWrattenrangeisasfollows.
.
.
RememberyoucanusetheOrange-Cyan,Yellow-VioletandGreen-Magentasliderstocreateanyfiltercolor.
Ifyouusethesesliders,thementionedWrattenfilterwillstillbethesameandwillbeaddedtotheadjustments.
TheOrange-Cyanslideriscalibratedtomatchcorrectionfiltersforincandescentlightanddaylightcorrection.
ThismeansyoucansubstitutetheWrattenfilterswithit,ormakeyourwrattenfiltersmuchstrongerthanthepresets.
KBKB1.
5=82A3=82C6=80D9=80C12=80B15=80A20=78AAKR1.
5=81A3=81C6=81EF9=85C12=85BThefollowinglistwillgiveyouahintaboutwhatfilterstouse:Clearbluesky=11000K.
KR9.
AverageSummerShade=8000K.
KR6.
Cloudedsky=7000.
KR3.
Sun50dgrs.
=6000K.
KR1.
5.
Sun30dgrs.
(daylightfilm)=5500K.
Nofilterrequired.
Hazy=4700K.
KB3.
Moonlight=4250K.
KB6.
200wattincadescent=2980K.
KB15.
100wattincadescent=2900K.
KB18.
75wattincadescent=2820K.
KB20.
BrightnessrangeinCorrectionFiltersMethodWhiteBalancePhotoshoppluginforcolorcorrectionfile:///C|/Users/Jan/Documents/My%20Websites/PRHomepage/_PDF_White-balance_plugin_tutorial.
htm[01-05-201018:26:13]WiththeCorrectionFilters-Wrattenmethodyougettheoptiontotargetthefilteringtoaspecificbrightnessrange.
YoucanalreadydothissomewhatwiththeRetouchLevels,butnowyougetaddedcontrol.
AnythingdarkerthantheFromslider,willnotbechanged.
AnythingbrighterthantheUpTosliderwilllikewiseremainunchanged.
Asanaidtosettingthesliders,youcanactivatetheMaskUnchangedmask;thiswillapplyacolortotheunchangedareas(inthepreviewonly).
IfthesliderSoftnessissetto0,thenhueswithinthechosenrangewillbechangedequally,andastheSoftnesssliderrises,theeffectwillfadeoutfromthetargetvaluetowardstheextremes,thussoftlyintegratingtheeffectinthewhole.
ColorPickerMethodStrongcolorsinthelightsThepickedcolorChangetocolorWorkflowWiththismethodthesliderAuto-filter%isdisabled.
Thelongrectangleatthetopstilldisplaysthefiltercolor.
Ifthebrightestlitobjectinyourphotoisnotwhite,but,say,avividyellow,thenyouwillwanttobeabletopickthatvividyellowandtellthepluginwhatcoloritoughttobe.
ThelongChangetorectangleatthebottomdisplaysthecolor,youwantthepicktobe.
Whenyoupickacolor,thepickwillbedisplayedinthesmallrectangletotheright.
ClickthebuttonCopytosetthelongrectangletothesamecolor.
Whenyoudothis,andifyouhavethe"Adjustfiltercolor"slidersto0,thenyouwillnoticethedisplayedfiltercolorwillbewhite.
Thepluginautomaticallycalculatestheexactfilterthatwillchangethepicktothedesiredcoloranddisplaysthefiltercolorinthetoplongrectangle.
Tosetthecolorofeitherofthelongrectangles,clickinitandyouwillbepresentedwithastandardcolorpickerwhereyouhavenumerousoptionsforadjustingthecolor.
Bearinmindthatwhattheplugindoesiscalculateacorrection-filtercolor,notanexposurecorrection,soyoucan'tchangethefilteringbychangingadarkerhueofthesamecolor.
Butselectingastronger(moresaturated)"Changeto"colorwillhaveastrongereffect.
Acolorisusuallylesssaturatedifyoumakeitdarker,sothepluginwilltypicallyunderstandadarkerselectionasalessstrongfilter.
Originalphotowithstronggreencast.
Colorpickermethod1.
Pickacolor,Thepluginwillfirstautomaticallytrytocorrectittoaneutralcolor.
2.
Ifyouarenotsatisfiedwiththis,clickthelongrectangletoopenthecolorpicker.
Thenselectwhatthecolorshouldbe.
Thefilterthencalculatesthedifferenceandsetsthisasthecorrectionfilter.
3.
Ifyouarenothappywiththis,eitherusetheabovethreeadjustfiltercolorsliders,orclickinthelongrectangletogetacolorpicker.
Eitherclickintheupperorlowerlongrectangle.
4.
Ifyouwanttocopythepickedcolortothelong"changeto"rectangle,thenclickthecopybutton.
Afterthisclickthe"changeto"rectangleanditwillhavethepickedcolorasdefault.
Thiscanbeanaidinchoosingthe"changeto"color.
WhiteBalancePhotoshoppluginforcolorcorrectionfile:///C|/Users/Jan/Documents/My%20Websites/PRHomepage/_PDF_White-balance_plugin_tutorial.
htm[01-05-201018:26:13]GraychartMethodsLargePicksExposureResetAllthegray-chartmethodshavetheoptionsforLargePicksandforadjustingExposureofthespecificbrightnessrangerepresentedbythegraypatchpicked.
LargePickschangesthepickerfrompickingthevalueofasinglepixeltoalargegroupofpixels.
Usinglargepickshelpspickingthehueoftheobject,ratherthansomerandomnoiseorafilmgrain.
Exposurewillchangetheexposureofareasinthephotothathavethespecificbrightnessrangeoftherelevantpatch.
Forexampleyoucanchangetheexposureofthemiddlegrayareasfrom50%toanywherewithin30to70%.
Resetwillresetallexposureslidersto0.
Youdonothavetopickallfortheplugintowork.
Itcalibratesthecorrectiononthebasisofyourselections.
Inordertofindoutifyouneedapickornot,andselectthebestpicks,youcanturntheusedpicksonandoffbyremovingthetick.
WhatarethecorrectvaluesofthegraychartpatchesPhotographedpatchesareusuallybrighterManufacturersofcolorrenditionchartsoftenstatetheL-value(brightness)oftheirpatches,butsuchmeasurementsaremadeunderidealsituationswithnoscatteredlightinterfering.
Inanyrealphoto-situation,thescatteredlightinthestudio,orout-doors,willcausethepatches,especiallytheblack,toappearbrighterthanit'sformalL-value.
ThedeviationbetweentheL-valueandtheactualobservedvaluedoesnotvarymuchwithvariouslightingconditionssuitableforphotographing.
Thereforewecouldmaketheplugintakethedeviationintoaccountandcalibratethefiltertothephotographedpatch,ratherthanthetechnicallymeasuredL-valueofthepatch.
ForexampleGretagMacbethinsisttheirblackpatchistrueblackandshouldbesettoRGB=(0,0,0)inyourphotos,butyouwillfindthatthisisnevertrue-infactonlytrueifyouplacethepatchashadowpartofthepicture,whichwouldbequiteuseless.
Ifyoufindthefilterdoesnotsetthebrightnessofthepatchcorrectly,youcanchangeitwiththeExposuresliders.
Thevariousbrandsvaryinthekindofblacktheirblack-patchhas,andtheyhaveadoptedvariousstrategiesforvariousreasons.
Ofthepatcheswehaveimplemented,WhiBaloffersthedarkestblackpatchanditisalmostatrueblackwhenphotographed;thisisbecauseithasasilkysemiglosssurfacewhichabsorbsmuchlight.
GretagMacbethoffersamatblack,buttheverymatnesscausesittoreflectscatteredlightoffitssurface,makingitappearoff-blackwhenphotographed.
Ourplugintakesthefactorsofthevariousblackpatchesintoaccount.
Ifyouneedatrueblackpatch(rarely,butitcanbeusefulwhenphotographingpaintingsofoff-blackmaterial),thenitmustbeinsideablackboxortubetoremovelightandreflections(theopeningofwhichofcoursepointstowardsthecamera)andalsosemi-glossyandmadeofatransparentmaterialbecausethehigherrefractiveindexwillmakethepatchabsorblight,thatwouldotherwisebereflectedoffthesurface.
Glasspaintedwithlampblackoilpaintontherearsideplacedatthebottomofablacktubewilldowell.
Thetubeshouldbetwiceaslongasitiswideandabout5cmwide.
Pointittowardsthecameraandyou'llhaveatrueblackreferencepoint.
UsingGraycardsorWhitecardsGraycardsTheGrayPickmethodsaremadesothatyoudonothavetopickallavailablepatches.
Youcanpickjustagrayorawhitepatch.
Youcouldalsojustpickablack,butthatwillnotproduceagoodfilteringofthelight.
Weoffertwograychartsettings.
50%whiteand60%white.
ThestandardKodakgraychartis50%.
Stronglightandsurfacereflectionmaycauseittoappearbrighterwhenphotographed,inwhichcase60%maybemoreappropriate.
Alsoyoumightoftenwantaslightbrighteningofmidtonesinwhichcaseyoucanusea50%graychartbutselectthe60%option.
TheGretagMacbethgraycharthasit'smiddlegraysetto60%.
WhiBal:3or4GreysWhiteBalancePhotoshoppluginforcolorcorrectionfile:///C|/Users/Jan/Documents/My%20Websites/PRHomepage/_PDF_White-balance_plugin_tutorial.
htm[01-05-201018:26:13]WhiBalcorrectioncardsWhiBalG6card.
Thisisasinglesturdycardwithalabelattached.
Thelabelisawhiteandablackpatch.
IfyouusetheWhiBalG6cardusetheregularwhiteandblackpickersintheplug-in,butofthetwograys,usethelightgrey.
WhiBaloriginallywasasetoffourthickplasticcardsforwhitebalancecorrection.
Itcamewithawhite,ablackandtwograys.
Ifyouusethissetofcards,useallfourpickersintheplug-in.
VisittheWhiBalhomepagehere.
GretagMacbethColorRenditionChart(24patch):6GraysGretagMacbethcorrectionchartGretagMacbethColorRenditionChartisastandardcolorreferencechartusedbyphotographers.
PowerRetouchehasexpandedthechartsusefordigitalphotographybyimplementingwhitebalancecorrectionfromthesixgraypatches.
Youdonothavetopickallsix.
VisittheGretagMacbethhomepagehere.
Auto-lightsAuto-LightsInAutoLightsthepluginscansthephototodeterminethecolorofthelightinthephoto.
Itthencalibratesafiltercolortocorrectwhitebalanceandremovecolorcast.
Here'sanexampleofpureAutoLightsfiltering.
Theleftphotoistheoriginal:Auto-midtonesIfyourpictureismainlyinthemidtonerange,orthecolorcastismostpronouncedinthemidtones--likeintheexamplejustbelow--theAuto-Midtonesmethodwillsuityou.
Theabovephotowillnotbesuitedfortheauto-lightsmethodforanotherreason,whichisimportanttonote:Thebrightestareasofthephoto(thegreengrasstotheright)WhiteBalancePhotoshoppluginforcolorcorrectionfile:///C|/Users/Jan/Documents/My%20Websites/PRHomepage/_PDF_White-balance_plugin_tutorial.
htm[01-05-201018:26:13]doesnotshowanycolorcastsoitwilltricktheplug-intoadoptawrongfilter.
Inthisphotothefacehasthecolorcastwewanttoremoveinthemidtones.
Wewouldprobablywanttocorrecttheexposurealso,sothiswedidintheexampletotheright(Weraisedexposureandoffset,thendeepenedtheblacks.
AllwithintheWhiteBalanceplug-ininonego):Auto-midtonesisparticularlysuitedforcorrectingportraitswhereyouwantsomeofthecolorofthelightpreservedorespeciallywanttopreservethecoolreflectedlightssotypicalforskinphotographedout-doors.
Thefacebeingofcourseinthemidtonerangeandthefilterthuscorrectingmainlythefacemorethanthereflectedlightsandstrongshadows.
Original-Withaheavybluecastfromaclearbluesky.
Youcanseethisbecausemainlythelightsareblue,butwewanttopreservethecold/warmcontrastofthelight/shade,sowewon'tuseauto-lightcorrection.
Auto-midtonesFilteradjustedslightlyred:Yellow10Magenta10Theremainingblueinthelightsaccentuatesthatthisisanout-doorsphoto.
Auto-ColorcastOriginal-Thiscouldhavebeenanicewarmpicture,butabluecolorcastruinsit.
Auto-ColorcastExposure+0.
99BlackPoint30FiltercoloradjustedYellow10Magenta10Asyoucanseefromthemiddleimage,Auto-Colorcastcorrectlyremovesthecolorcastfromboththelight,midtonesanddarks.
Butthepicturestilldoesnothavethewarmtoneappropriatefortheoccasion,sointhelastexampleweadjustedthefiltercolor.
BrightnessrangeExampleTargetcolorcastremovalTargetthefilterprogressivelytolightsandmidtonesWhiteBalancePhotoshoppluginforcolorcorrectionfile:///C|/Users/Jan/Documents/My%20Websites/PRHomepage/_PDF_White-balance_plugin_tutorial.
htm[01-05-201018:26:13]OriginalwithaheavybluecolorcastNotethereflectionsinthelakearetonedperfectlyCopyright2001-2010PowerRetouche.
comAllrightsReserved.
htm[01-05-201018:26:13]WhiteBalanceCorrectorPlugin-TutorialBenefitsofthepluginCorrectcolorcastinphotosduetounfortunatelightingconditions.
ManuallyapplydigitalequivalentsofKodak-Wratten78AAto85B+.
AutomodescansthephotoandsetsthecorrectionfilterforanylightsourceAdjustthefiltercolorexactly.
Targetthecorrectiontoanyrangeoflights,midtonesorshadows.
Thewhitebalancefilterpluginworkswiththeseimagemodes(WindowsandMac).
.
.
8&16bit/channel:RGB,CMYK.
TutorialTutorialaspdfBuyplug-insnowProductsoverviewwhitebalancefiltercontrolsThisisthewhitebalanceplug-inscontrolpanel(Mac).
Clickimagetoenlarge.
Thecontrolpanelandpreviewareacanbechangedbydraggingthesides.
1.
Automatic(threedifferentmodes)2.
Filtercolor(incl.
Kodak-Wrattenstandards)3.
Colorpicker4.
Brightnessrange5.
SeveralstandardgraychartsSeeWindowspluginSeeMacpluginDownloadWinplug-insDownloadMacplug-insDownloadtutorialsExample-AutomaticcorrectionofcolorcastThewhitebalancepluginisusefulforglobalortargetedwhitebalancecorrections.
Yougetfullcontroloverthefiltercoloraswellasexposureandmuchmore.
.
.
Anexampleofauto-correction(Auto-Lights)HowtomasterwhitebalanceandremovecolorcastwithourPhotoshoppluginExtremelyversatilewhitebalanceandcolorcastfilter.
Youcansetanyfiltercolorimaginableandanyspecialbehavioronthelight.
EitherselecttheequivalentsofWrattenfiltersorusegraychartssuchasWhiBalorMacbethtocorrectexposureandwhitebalance.
Youcantargetcorrectiontoanyrangeofbrightnessvaluesandthuscorrectlocalcolorcast.
Thepluginhasthreeautomodes.
Manymoreoptions.
.
.
PowerRetouchePhotoshopplug-insarealsoforPaintShopPro,CorelDraw,Illustrator,Fireworksandothergraphicsoftwareorphotosoftwareforphotoediting,retouchingandrestoration(Mac&Win)seelistWhiteBalancePhotoshoppluginforcolorcorrectionfile:///C|/Users/Jan/Documents/My%20Websites/PRHomepage/_PDF_White-balance_plugin_tutorial.
htm[01-05-201018:26:13]WhatisWhiteBalanceandColorCastPhotoslookbrownishwhentakenwitharegulardaylightfilminartificiallightorincandlelight.
Oftenyouhavemixeddaylightandincandescentlightandjustwanttoadjustthetone.
Ormaybetheoutdoorslightisextremeandneedscorrection-forexampleyoumighthaveaheavyblue-toneinascenewithabrightbluesky.
Theworstscenarioiswhenyouhavetophotographinamixtureoffluorescentlightandtungstenwithoutanydaylight.
Theexampletotherightisonesuchinstanceandshowsthecharacteristicstronggreencast.
ItwasfilteredwiththeAuto-Lightsmethod.
Photographersplaceabluefilterbeforethelenswhentakingphotoswithadaylightfilminartificiallight.
TypicallyKB12(Wratten80B),butsometimesitneedstobemoreblue,likeifyoutakepicturesatcandlelight,whereyouwillneedKB20(Wratten78AA).
TheWhite-Balanceplugincancorrectanydiscolorationfromcoloredortonedlight.
IthaspresetsforstandardfiltersKB20-KR20(Wratten78AA-85B+).
Inadditionyoucanadjustthecolorofthesepresetfiltersandcreateevenstrongerfiltersifneedbe.
Automodescalibratesanyfiltercolorforwhitebalancecorrection.
Thisisidealforthenotoriouslydifficultcombinationsoffluorescentlightswithotherlightsources.
Therearethreeautomodesdesignedtohandlevariouscolorcastsituations.
Auto-lightsisthemostusefulone.
Itisalsocustomarytophotographachartofreferencecolorpatchesalongwithyourpicture.
PowerRetoucheWhiteBalanceCorrectorincorporatesthemostimportantsuchcharts(Kodak,GretagMacbeth,WhiBal).
MethodsTheWhiteBalanceCorrectorofferstenmethodsforwhitebalancecorrection.
Youchoosebetweenthemfromthemenu.
Threeautomodesdesignedtosuitthreetypicalcolorcastproblems.
OnemethodforapplyingdigitalequivalentsofstandardWrattenfilters.
Alsoforcreatinganyfiltercoloryoumayfancy.
Onemethodforpickingthecolorofsomebrightlylitcoloredobjectinthepictureandsettingacorrectionfilterfromthat.
Usefulifyourbrightestobjectshaveastrongcolor.
Fivemethodsforpickinggraysfromdifferentcolorrenditionchartsthatphotographerstypicallyphotographintotheirimages.
CommonControls:Exposure&RetouchLevelsExposureAutoExposureOffsetBlackPointAlertsRetouchLevelsAllmethodshavethesetwocontrolgroupsincommon.
ExposureStopsiscalibratedfromaFujichartofstandardsandusesthesamealgorithmasexposurecorrectioninourBWStudioplugin.
PleaseconsultthepageaboutthisfiltertoseetheFujichartandcomparisonswiththefiltersresults.
Youwillfindtheyareidentical.
AutoExposurewillmaketheplug-indoautomaticexposurecorrection.
Youcanstillusetheothersliderstoadjusttheimage.
OffsetandBlackPoint.
Offsetsimplymakestheentireimagebrighterordarker.
BlackPointpullsthedarkstowardsblack.
Theyareanicecoupleasyoucanuseoffsettosettheimageswhitepointandthenstretchthedarkstosettheblackpoint.
Alternativelyyoucanuseoffsettoreachblackandthenusetheexposurecontroltoreachnearwhite.
UsetheAlertsasanaidtosetexposure/offsetandblackpoint,orasahelptoavoidoverexposingtheimage.
Areasintheimagethatreachorclippurewhitewillbecoloredinthepreview.
Likewise,areasthatreachorclippureblackwillbecolored.
Youcanchangethecolorsofthemasksbyclickinginthecoloredrectangles.
WhiteBalancePhotoshoppluginforcolorcorrectionfile:///C|/Users/Jan/Documents/My%20Websites/PRHomepage/_PDF_White-balance_plugin_tutorial.
htm[01-05-201018:26:13]Lights,midtones,darks.
Thisdeterminesthestrengthofthefilterinthethreedifferentbrightnesslevels.
Thismeansyoucanapplyafilter,forexample,fullstrengthtothemidtones,lessstrengthtothelightsandstilllessinthedarks.
AdjustFiltercolorOrange-CyanYellow-VioletGreen-MagentaFiltercolorColorpickerAllmethods,excepttheonesforpickinggraysoncolorrenditioncharts,allowyoutoadjustorchangethefiltercolor.
InsteadofthecommonRGBcontrols(red,green,blue)wedecidedtoimplementthreemoreusefulsliders:Orange-Cyan,Yellow-VioletandGreen-Magenta.
Inadditionthereisaslidertocontroltheintensityoftheautofilter,calculatedbytheplug-in.
TheOrange-Cyanslideriscalibratedtomatchstandardfiltersforcorrectionofincandescentlightordaylight.
TheYellow-Violetslideriscalibratedsothatthevioletrangematchesfiltersforcommonmixturesofhalogenortungstenandfluorescentlight.
TheGreen-Magentaslideriscalibratedsothatthemagentarangematchesfiltersforcommonfluorescentlights(thisisactuallyverydifficult,becausefluorescentlightcomesinnumerousvarieties).
Thelongcoloredrectangleshowsthecurrentfiltercolor.
Clickthelongcoloredrectangletogetastandardcolorpickeryoucanselectafiltercolorfromortogetmoreoptionstoadjustthefiltercolor.
Notallcolorsthatcanbepickedwillfallwithintherangeofpossiblefilters,sothepluginmayinsomecaseschangethepickedcolortotheclosestpossiblefiltercolor.
AdjustFiltercolor-CorrectionFilters(Wratten)IfyouselectthemethodCorrectionFilters-Wratten,thenyouwillbepresentedwithanextraslidertopickdigitalequivalentsofcommonWrattencorrectionfiltersfordaylightandincandescentlight.
ThesliderusestheEuropeanB&Wnomenclaturesothat-3isequaltofilterKB3,+12equaltoKR12,etc.
BelowthesliderisstatedtheequivalentWrattenfilters.
Thedisplayedfiltercolor(intherectangle)mayappearpalerthanthephysicalglassorgelatinfilterdoestotheeye.
TheequivalentWrattenrangeisasfollows.
.
.
RememberyoucanusetheOrange-Cyan,Yellow-VioletandGreen-Magentasliderstocreateanyfiltercolor.
Ifyouusethesesliders,thementionedWrattenfilterwillstillbethesameandwillbeaddedtotheadjustments.
TheOrange-Cyanslideriscalibratedtomatchcorrectionfiltersforincandescentlightanddaylightcorrection.
ThismeansyoucansubstitutetheWrattenfilterswithit,ormakeyourwrattenfiltersmuchstrongerthanthepresets.
KBKB1.
5=82A3=82C6=80D9=80C12=80B15=80A20=78AAKR1.
5=81A3=81C6=81EF9=85C12=85BThefollowinglistwillgiveyouahintaboutwhatfilterstouse:Clearbluesky=11000K.
KR9.
AverageSummerShade=8000K.
KR6.
Cloudedsky=7000.
KR3.
Sun50dgrs.
=6000K.
KR1.
5.
Sun30dgrs.
(daylightfilm)=5500K.
Nofilterrequired.
Hazy=4700K.
KB3.
Moonlight=4250K.
KB6.
200wattincadescent=2980K.
KB15.
100wattincadescent=2900K.
KB18.
75wattincadescent=2820K.
KB20.
BrightnessrangeinCorrectionFiltersMethodWhiteBalancePhotoshoppluginforcolorcorrectionfile:///C|/Users/Jan/Documents/My%20Websites/PRHomepage/_PDF_White-balance_plugin_tutorial.
htm[01-05-201018:26:13]WiththeCorrectionFilters-Wrattenmethodyougettheoptiontotargetthefilteringtoaspecificbrightnessrange.
YoucanalreadydothissomewhatwiththeRetouchLevels,butnowyougetaddedcontrol.
AnythingdarkerthantheFromslider,willnotbechanged.
AnythingbrighterthantheUpTosliderwilllikewiseremainunchanged.
Asanaidtosettingthesliders,youcanactivatetheMaskUnchangedmask;thiswillapplyacolortotheunchangedareas(inthepreviewonly).
IfthesliderSoftnessissetto0,thenhueswithinthechosenrangewillbechangedequally,andastheSoftnesssliderrises,theeffectwillfadeoutfromthetargetvaluetowardstheextremes,thussoftlyintegratingtheeffectinthewhole.
ColorPickerMethodStrongcolorsinthelightsThepickedcolorChangetocolorWorkflowWiththismethodthesliderAuto-filter%isdisabled.
Thelongrectangleatthetopstilldisplaysthefiltercolor.
Ifthebrightestlitobjectinyourphotoisnotwhite,but,say,avividyellow,thenyouwillwanttobeabletopickthatvividyellowandtellthepluginwhatcoloritoughttobe.
ThelongChangetorectangleatthebottomdisplaysthecolor,youwantthepicktobe.
Whenyoupickacolor,thepickwillbedisplayedinthesmallrectangletotheright.
ClickthebuttonCopytosetthelongrectangletothesamecolor.
Whenyoudothis,andifyouhavethe"Adjustfiltercolor"slidersto0,thenyouwillnoticethedisplayedfiltercolorwillbewhite.
Thepluginautomaticallycalculatestheexactfilterthatwillchangethepicktothedesiredcoloranddisplaysthefiltercolorinthetoplongrectangle.
Tosetthecolorofeitherofthelongrectangles,clickinitandyouwillbepresentedwithastandardcolorpickerwhereyouhavenumerousoptionsforadjustingthecolor.
Bearinmindthatwhattheplugindoesiscalculateacorrection-filtercolor,notanexposurecorrection,soyoucan'tchangethefilteringbychangingadarkerhueofthesamecolor.
Butselectingastronger(moresaturated)"Changeto"colorwillhaveastrongereffect.
Acolorisusuallylesssaturatedifyoumakeitdarker,sothepluginwilltypicallyunderstandadarkerselectionasalessstrongfilter.
Originalphotowithstronggreencast.
Colorpickermethod1.
Pickacolor,Thepluginwillfirstautomaticallytrytocorrectittoaneutralcolor.
2.
Ifyouarenotsatisfiedwiththis,clickthelongrectangletoopenthecolorpicker.
Thenselectwhatthecolorshouldbe.
Thefilterthencalculatesthedifferenceandsetsthisasthecorrectionfilter.
3.
Ifyouarenothappywiththis,eitherusetheabovethreeadjustfiltercolorsliders,orclickinthelongrectangletogetacolorpicker.
Eitherclickintheupperorlowerlongrectangle.
4.
Ifyouwanttocopythepickedcolortothelong"changeto"rectangle,thenclickthecopybutton.
Afterthisclickthe"changeto"rectangleanditwillhavethepickedcolorasdefault.
Thiscanbeanaidinchoosingthe"changeto"color.
WhiteBalancePhotoshoppluginforcolorcorrectionfile:///C|/Users/Jan/Documents/My%20Websites/PRHomepage/_PDF_White-balance_plugin_tutorial.
htm[01-05-201018:26:13]GraychartMethodsLargePicksExposureResetAllthegray-chartmethodshavetheoptionsforLargePicksandforadjustingExposureofthespecificbrightnessrangerepresentedbythegraypatchpicked.
LargePickschangesthepickerfrompickingthevalueofasinglepixeltoalargegroupofpixels.
Usinglargepickshelpspickingthehueoftheobject,ratherthansomerandomnoiseorafilmgrain.
Exposurewillchangetheexposureofareasinthephotothathavethespecificbrightnessrangeoftherelevantpatch.
Forexampleyoucanchangetheexposureofthemiddlegrayareasfrom50%toanywherewithin30to70%.
Resetwillresetallexposureslidersto0.
Youdonothavetopickallfortheplugintowork.
Itcalibratesthecorrectiononthebasisofyourselections.
Inordertofindoutifyouneedapickornot,andselectthebestpicks,youcanturntheusedpicksonandoffbyremovingthetick.
WhatarethecorrectvaluesofthegraychartpatchesPhotographedpatchesareusuallybrighterManufacturersofcolorrenditionchartsoftenstatetheL-value(brightness)oftheirpatches,butsuchmeasurementsaremadeunderidealsituationswithnoscatteredlightinterfering.
Inanyrealphoto-situation,thescatteredlightinthestudio,orout-doors,willcausethepatches,especiallytheblack,toappearbrighterthanit'sformalL-value.
ThedeviationbetweentheL-valueandtheactualobservedvaluedoesnotvarymuchwithvariouslightingconditionssuitableforphotographing.
Thereforewecouldmaketheplugintakethedeviationintoaccountandcalibratethefiltertothephotographedpatch,ratherthanthetechnicallymeasuredL-valueofthepatch.
ForexampleGretagMacbethinsisttheirblackpatchistrueblackandshouldbesettoRGB=(0,0,0)inyourphotos,butyouwillfindthatthisisnevertrue-infactonlytrueifyouplacethepatchashadowpartofthepicture,whichwouldbequiteuseless.
Ifyoufindthefilterdoesnotsetthebrightnessofthepatchcorrectly,youcanchangeitwiththeExposuresliders.
Thevariousbrandsvaryinthekindofblacktheirblack-patchhas,andtheyhaveadoptedvariousstrategiesforvariousreasons.
Ofthepatcheswehaveimplemented,WhiBaloffersthedarkestblackpatchanditisalmostatrueblackwhenphotographed;thisisbecauseithasasilkysemiglosssurfacewhichabsorbsmuchlight.
GretagMacbethoffersamatblack,buttheverymatnesscausesittoreflectscatteredlightoffitssurface,makingitappearoff-blackwhenphotographed.
Ourplugintakesthefactorsofthevariousblackpatchesintoaccount.
Ifyouneedatrueblackpatch(rarely,butitcanbeusefulwhenphotographingpaintingsofoff-blackmaterial),thenitmustbeinsideablackboxortubetoremovelightandreflections(theopeningofwhichofcoursepointstowardsthecamera)andalsosemi-glossyandmadeofatransparentmaterialbecausethehigherrefractiveindexwillmakethepatchabsorblight,thatwouldotherwisebereflectedoffthesurface.
Glasspaintedwithlampblackoilpaintontherearsideplacedatthebottomofablacktubewilldowell.
Thetubeshouldbetwiceaslongasitiswideandabout5cmwide.
Pointittowardsthecameraandyou'llhaveatrueblackreferencepoint.
UsingGraycardsorWhitecardsGraycardsTheGrayPickmethodsaremadesothatyoudonothavetopickallavailablepatches.
Youcanpickjustagrayorawhitepatch.
Youcouldalsojustpickablack,butthatwillnotproduceagoodfilteringofthelight.
Weoffertwograychartsettings.
50%whiteand60%white.
ThestandardKodakgraychartis50%.
Stronglightandsurfacereflectionmaycauseittoappearbrighterwhenphotographed,inwhichcase60%maybemoreappropriate.
Alsoyoumightoftenwantaslightbrighteningofmidtonesinwhichcaseyoucanusea50%graychartbutselectthe60%option.
TheGretagMacbethgraycharthasit'smiddlegraysetto60%.
WhiBal:3or4GreysWhiteBalancePhotoshoppluginforcolorcorrectionfile:///C|/Users/Jan/Documents/My%20Websites/PRHomepage/_PDF_White-balance_plugin_tutorial.
htm[01-05-201018:26:13]WhiBalcorrectioncardsWhiBalG6card.
Thisisasinglesturdycardwithalabelattached.
Thelabelisawhiteandablackpatch.
IfyouusetheWhiBalG6cardusetheregularwhiteandblackpickersintheplug-in,butofthetwograys,usethelightgrey.
WhiBaloriginallywasasetoffourthickplasticcardsforwhitebalancecorrection.
Itcamewithawhite,ablackandtwograys.
Ifyouusethissetofcards,useallfourpickersintheplug-in.
VisittheWhiBalhomepagehere.
GretagMacbethColorRenditionChart(24patch):6GraysGretagMacbethcorrectionchartGretagMacbethColorRenditionChartisastandardcolorreferencechartusedbyphotographers.
PowerRetouchehasexpandedthechartsusefordigitalphotographybyimplementingwhitebalancecorrectionfromthesixgraypatches.
Youdonothavetopickallsix.
VisittheGretagMacbethhomepagehere.
Auto-lightsAuto-LightsInAutoLightsthepluginscansthephototodeterminethecolorofthelightinthephoto.
Itthencalibratesafiltercolortocorrectwhitebalanceandremovecolorcast.
Here'sanexampleofpureAutoLightsfiltering.
Theleftphotoistheoriginal:Auto-midtonesIfyourpictureismainlyinthemidtonerange,orthecolorcastismostpronouncedinthemidtones--likeintheexamplejustbelow--theAuto-Midtonesmethodwillsuityou.
Theabovephotowillnotbesuitedfortheauto-lightsmethodforanotherreason,whichisimportanttonote:Thebrightestareasofthephoto(thegreengrasstotheright)WhiteBalancePhotoshoppluginforcolorcorrectionfile:///C|/Users/Jan/Documents/My%20Websites/PRHomepage/_PDF_White-balance_plugin_tutorial.
htm[01-05-201018:26:13]doesnotshowanycolorcastsoitwilltricktheplug-intoadoptawrongfilter.
Inthisphotothefacehasthecolorcastwewanttoremoveinthemidtones.
Wewouldprobablywanttocorrecttheexposurealso,sothiswedidintheexampletotheright(Weraisedexposureandoffset,thendeepenedtheblacks.
AllwithintheWhiteBalanceplug-ininonego):Auto-midtonesisparticularlysuitedforcorrectingportraitswhereyouwantsomeofthecolorofthelightpreservedorespeciallywanttopreservethecoolreflectedlightssotypicalforskinphotographedout-doors.
Thefacebeingofcourseinthemidtonerangeandthefilterthuscorrectingmainlythefacemorethanthereflectedlightsandstrongshadows.
Original-Withaheavybluecastfromaclearbluesky.
Youcanseethisbecausemainlythelightsareblue,butwewanttopreservethecold/warmcontrastofthelight/shade,sowewon'tuseauto-lightcorrection.
Auto-midtonesFilteradjustedslightlyred:Yellow10Magenta10Theremainingblueinthelightsaccentuatesthatthisisanout-doorsphoto.
Auto-ColorcastOriginal-Thiscouldhavebeenanicewarmpicture,butabluecolorcastruinsit.
Auto-ColorcastExposure+0.
99BlackPoint30FiltercoloradjustedYellow10Magenta10Asyoucanseefromthemiddleimage,Auto-Colorcastcorrectlyremovesthecolorcastfromboththelight,midtonesanddarks.
Butthepicturestilldoesnothavethewarmtoneappropriatefortheoccasion,sointhelastexampleweadjustedthefiltercolor.
BrightnessrangeExampleTargetcolorcastremovalTargetthefilterprogressivelytolightsandmidtonesWhiteBalancePhotoshoppluginforcolorcorrectionfile:///C|/Users/Jan/Documents/My%20Websites/PRHomepage/_PDF_White-balance_plugin_tutorial.
htm[01-05-201018:26:13]OriginalwithaheavybluecolorcastNotethereflectionsinthelakearetonedperfectlyCopyright2001-2010PowerRetouche.
comAllrightsReserved.
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