英语翻译
AhumanfacecanbemodeledusingPhotoModelerScanner(PMScanner)usingoneormorepairsofstereophotos.Sometimesitispossiblewithasinglecamera,butduetothesubtlemovementofahumanface(despitealleffortsofyourmodeltokeepstill!),youwillusuallygetabetterresultwithtwoormoresynchronizedcameras.
Thefollowingsequenceofstepsisbasedontheassumptionthatyouknowthebasicsofmarkingandreferencingpoints(targetandnon-targetpoints),thatyouarefamiliarwiththebasicstepsofcreatingDSM’swithPMScanner,andthatyouhaveawellcalibratedcamera.
FormorebasicinstructionsthePMScannertutorialprojectsandvideosareagoodplacetostart.
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SceneSetupandPhotography
1.Placeaseriesoftargetsonawallorarigsothattargetssurroundtheface.Ensureasmanyofthetargetsarevisibleinasmanyofthephotosaspossible.Codedtargetsmakeorientationandsetupphaseveryefficient.
2.Haveyourfacemodelsittingcomfortablyandstill.Ifusingjustonecamera,themodelwillneedtobeextremelystillduringphotography.
Thefollowingshowsatypicalsetup(onephotoofa4-synchronizedcamerassetup):
3.Ifusingsynchronizedcameras,setupyourcamerasontripodsandtestyoursynchronization(usingaremotecontrolorotherremotetriggeringsystem).
Arrangeyourcamerasinaconfigurationsimilartothis(ifnotusingsynchronizedcameras,moveyourcameratothesepositionsasquicklyaspossiblebeforeyourmodelmoves!)andtakethephotos:
Theanglesbetweenthesepositionswillbesmallandclosetoparallel.Thereshouldnotbeanymorethanafewdegreesoftoe-inangle.
Usually4photoswillbeenoughtomodelthefaceandpartsofthesidesofthehead.Ifyouwanttomodelthefront,sides,andback,you’llneedtomakesureyourphotopairscovertheentireareaofinterest,andyou’llneedtomakesurethatyouhaveenoughtargetsinviewtoadequatelyorientyourphotos.
Youmaywanttoincludeanotherphotofromthesideoraboveatagreaterangletoassistincameraorientation.Thecamerainredabovesugge
