PhotoScan軟件操作說明（初學(xué)者）

Tutorial(Beginnerlevel):3DModelReconstructionwithAgisoftPhotoScan1.0.0PhotoScanPreferences偏好 OpenPhotoScanPreferencesdialogfromToolsmenuusingcorrespondingcommand.從工具按鈕打開偏好設(shè)置對(duì)話框。SetthefollowingvaluesfortheparametersintheGeneraltab:在通用一欄設(shè)置如下的值StereoMode:DisabledStereoParallax:1.0Writelogtofile:specifydirectorywhereAgisoftPhotoScanlogwouldbestored(incaseofcontactingthesoftwaresupportteamitcouldberequired)SettheparametersintheOpenCLtabasfollowing:CheckonanyOpenCLdevicesdetectedbyPhotoScaninthedialogandreducethenumberofactiveCPUcoresbyoneforeachOpenCLdeviceenabled.SetthefollowingvaluesfortheparametersintheAdvancedtab:Projectcompressionlevel:6Keepdepthmaps/Storeabsoluteimagepaths:disabledCheckforupdatesonprogramstartup:EnabledEnableVBOsupport:DisabledAddPhotosToaddphotosselectAddPhotos...commandfromtheWorkflowmenuorclickAddPhotosbuttonlocatedonWorkspacetoolbar.IntheAddPhotosdialogbrowsethesourcefolderandselectfilestobeprocessed.ClickOpenbutton.MaskPhotosToachievegoodreconstructionresultsitisnecessarytomaskallirrelevantelementsonthesourcephotos(background,turntable,accidentalforeground,etc.).OpenaphotowithanirrelevantelementinPhotoViewdouble-clickingonthephotointhePhotopane.ChooseoneoftheselectiontoolsfromtheToolbar:RectangularSelectionforrectangularshapeirrelevantelements; IntelligentScissors–toselectirregularshapedareainthephoto;IntelligentPaint–topainttheselectionwiththemouse.Tomaskuniformbackgroundoftheimageuse MagicWandtool.First,clicktheMagicWandbuttonontheToolbar,thenclickinsidetheuniformareatobemasked.Tochangetheborderoftheautomaticallyselectedarea,clickinsidetheareatobeaddedtotheselection.AddtheselectedareatothecurrentmaskbyclickingtheAddSelectionbuttonfromthemainToolbar.ToalterthecurrentmaskuseotherselectiontoolstogetherwithAddSelection/ SubtractSelectionbuttonsontheToolbar.Repeatthedescribedprocedureforeveryphotowherebackground(irrelevantelements)shouldbemasked.MaskedareascouldbeignoredatAlignPhotosprocessingstage(CheckConstrainfeaturesbymaskoptioninAlignPhotosdialog)andarealwaysignoredatBuildDenseCloudandBuildTexturestages.AlignPhotosAtthisstagePhotoScanrefinesthecamerapositionforeachphotoandbuildsthepointcloudmodel.SelectAlignPhotoscommandfromtheWorkflowmenu.SetthefollowingrecommendedvaluesfortheparametersintheAlignPhotosdialog:Accuracy:High(higheraccuracysettinghelpstoobtainmoreaccuratecamerapositionestimates.Loweraccuracysettingcanbeusedtogettheroughcamerapositionsintheshortertime)Pairpreselection:Disabled(forfasterprocessingofthebignumberofphotosGenericpreselectioncanbeused)Constrainfeaturesbymask:Enabled(ifthemaskcoversanymovingobjectsincludingclouds)orDisabled(ifallmaskedareawasstaticduringshooting)Pointlimit:40000ClickOKbuttontostartphotoalignment.Afterphotoalignmentisfinished,refineboundingboxpositionandorientationtofittheobject:ThisstepisoptionalsincePhotoScanautomaticallycalculatesboundingboxdimensionsandlocation.Butitisrecommendedtocheckifanycorrectionisneeded,becausegeometryreconstructionstepdealsonlywiththepointcloudinsidethevolume.BoundingboxisresizableandrotatablewiththehelpofResizeRegionand RotateRegiontools.BuildDensePointCloudBasedontheestimatedcamerapositionstheprogramcalculatesdepthinformationforeachcameratobecombinedintoasingledensepointcloud.SelectBuildDenseCloudcommandfromtheWorkflowmenu.SetthefollowingrecommendedvaluesfortheparametersintheBuildDenseClouddialog: Quality: Medium (higherqualitytakeslongertimeanddemandsmorecomputationalresources)Depthfiltering:AggressivePointsfromthedensecloudcanberemovedwiththehelpofselectiontoolsandDelete/CropinstrumentslocatedontheToolbar.BuildMeshAfterdensepointcloudhasbeenreconstructeditispossibletogeneratepolygonalmeshmodelbasedonthedenseclouddata.SelectBuildMeshcommandfromtheWorkflowmenu.SetthefollowingrecommendedvaluesfortheparametersintheBuildMeshdialog:Surfacetype:ArbitrarySourcedata:DensecloudPolygoncount:High(maximumnumberoffacesintheresultingmodel.ThevaluesindicatednexttoHigh/Medium/Lowpresetlabelsarebasedonthenumberofpointsinthedensecloud)Interpolation:EnabledClickOKbuttontostartbuildinggeometry.BuildTextureThisstepcouldbeskippedifuntexturedmodelissufficientasthefinalresult.SelectBuildTexturecommandfromtheWorkflowmenu.SetthefollowingrecommendedvaluesfortheparametersintheBuildTexturedialog:Mappingmode:GenericBlendingmode:MosaicTexturesize/count:4096x1(width&heightofthetextureatlasinpixelsanddeterminesthenumberoffilesfortexturetobeexportedto.Exportingtexturetoseveralfilesallowstoarchivegreaterresolutionofthefinalmodeltexture,whileexportofhighresolutiontexturetoasinglefilecanfailduetoRAMlimitations)Enablecolorcorrection:disabledClickOKbuttontostartbuildingtexture.ExportModelIncasethemodelshouldbeexportedtothefile,selectExportModel...commandfromtheFilemenu.IntheSaveAs...dialogselectthefolderforthemodeltobesavedin,printinthef