8/6/2019 3D Movie Calculator Calculates
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3DMovieCalculatorcalculatesthecorrectinteraxialfromasmallsetofparameters.3DMovieCalculatoristhestereographerdream.Thissmoothandsimpleappcalculatestheoptimaldistancebetweenthetwocamerasina3Dshoot.HavingthisonyouriPhoneallowsyoutoworkfastandpreciseonamovieset,aligningtheperfectsetupforanyshotinseconds.3DMovieCalcisdesignedtobeusedforshooting3DMovieswithprofessionalequipmentliketheArriAlexa,theSI2K,REDOn
e,F35andsimilartopofthelinedigitalfilmcameras,butwillalsoworkforstillimages.BACKGROUND:HOW3DMOVIESWORKSWhentheaudiencewatchesa3Dmovieinthecinema,theyseetwoimagesatonce,oneimagewiththelefteyeandtheotherimagewiththerighteye.Thebrainfusesthetwoimagesintoone,withaddeddepthperception.Basically,thebrainfindssimilartexturesintheimages,andtherelativedistancebetweenthetexturestellsthebrainsomethingaboutthedistancetotheobject.Whenwecreate3Dmoviesforcinemas,weexploitthestereopsisdepthcluetocreateanunderstandingofdepthinthebrain.Butbecausestereopsisonlyworkswithintheclosest10meterstotheviewer,wecanonlycreateanimagethats10metersdeepfortheviewer.Furtherthan10metersaway,theeyesseeinanalmo
stparalleldirection,andthereforethebrainswitchestootherdepthclues.Whenaudiencelookatthescreeninthecinema,theywillconvergetheireyesonobjectsortexturesthatarethesameinbothimages,sobyshootingthepicturescorrectly,wecancontroltheconvergenceoftheeyes,andtherebythedepthperceived.Wedothisbytuningthedistancebetweenthecameras-theinteraxialdistance-tocreatethedepthforeachshotthatwewant.Foranaturaldepththatispleasurabletowatch,theinteraxialdistancehastobecorrectforthedepthweareshooting.Iftheinteraxialisnotcorrect,weforcetheeyestoeitherlookfurtherapartormorecrossedthenwhatsnaturalfortheshot,andthiscausesastrainontheeyes.HOW3DMOVIECALCULATORWORKS3DMovieCalculatorcalculatesthecorrectinteraxialdistance(sometimesreferredtoasintraoculardistance)fromasmallsetofparameters.
Asyoucanseebelow,theinterfaceisveryaccessible.Theprimaryinputsarethefarandneardistancesofobjectsinthesceneandthesettingsofthecameralensfocallength,camerasensorsize,thesizeofthescreenyouareshootingfor(acinemascreenisapprox12meterswide)andtheamountofdeptheffectyoudesire.Foracorrect,naturallyviewabledepth,seteffectto1.0X.Butyoumaychoosethatthismoviejustneedsasmallamountofdepth,orthatitneedsabitmoredepthforsomeshotsthanothers,theeffectinputiswhereyousetyourpreference.Ifyoudontknowthesizeofthesensorofthecamerayouareusing,presstheCamerasbuttonandmostlikelyyourcameraisthere.Ifnot,googleit.OnthePreferencesscreen,youcanalsochangethedisplayunitstobeeitherMe
tricorImperial.Onthemainscreenaretwoinputs,thefarpointandthenearpoint.Thefarpointisthedistancetothefurthestawayobjectinthepicture.Ifthisisreallyfaraway,likemountainsinthebackground,youshouldsetitatsomethinglike2000meters.Theinteraxialoutputisthecorrectdistancebetweenthecamerasfortheshotyouhavesetup.Theconvergenceoutputtellsyouhowfarfromthescreencamerasaxisshouldmeetthisiswhereyouwantyourmainsubjectandfocustobeintheshot.Formoreinformationabout3DMovieCalculator,havealookathttp://www.3DMovieCalc.com
