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首页 我们如何在医疗应用启发的近场增强现实中测量深度感知?

我们如何在医疗应用启发的近场增强现实中测量深度感知?.docx

我们如何在医疗应用启发的近场增强现实中测量深度感知?

大人
2019-05-13 0人阅读 举报 0 0 0 暂无简介

简介:本文档为《我们如何在医疗应用启发的近场增强现实中测量深度感知?docx》,可适用于考试题库领域

HowDoWeMeasureDepthPerceptioninNearFieldAugmentedRealityInspiredbyMedicalApplicationsDrJEdwardSwanIIJuneProfessorDeptofComputerScienceEngineeringAdjunctProfessorDeptofPsychologyAugmentedReality(AR)??ARdemofrommylab??Virtualobjects??Atrealworldlocations??SpatiallyrelatedtorealworldobjectsARMedicalApplicationsandPerceivedDepth??ARbasedtrainingsystemforplanningbraintumorresection–?RobartsResearchInstitute,WesternUniversity,Ontario,Canada–?KamyarAbhari,TerryPeters,andmanycollaborators??WhatistheperceiveddepthofthetumorHowdoesdepthperceptionoperate??WeseeDworldfromambiguousDretinalimages??Importantscientificquestionsincemid’s??CurrenttheoriesemphasizeimportanceofdepthcuesNearFieldDepthCuesn??n??n??n??n??n??n??OcclusionRelativeSizeRelativeDensityBinocularDisparityAccommodationConvergenceMotionPerspectiveNearFieldDepthCuesn??n??n??n??n??n??n??OcclusionRelativeSizeRelativeDensityBinocularDisparityAccommodationConvergenceMotionPerspectiveNearFieldDepthCuesn??n??n??n??n??n??n??OcclusionRelativeSizeRelativeDensityBinocularDisparityAccommodationConvergenceMotionPerspectiveNearFieldDepthCuesn??n??n??n??n??n??n??OcclusionRelativeSizeRelativeDensityBinocularDisparityAccommodationConvergenceMotionPerspectiveNearFieldDepthCuesn??n??n??n??n??n??n??OcclusionRelativeSizeRelativeDensityBinocularDisparityAccommodationConvergenceMotionPerspectiveNearFieldDepthCuesn??n??n??n??n??n??n??OcclusionRelativeSizeRelativeDensityBinocularDisparityAccommodationConvergenceMotionPerspectiveNearFieldDepthCuesn??n??n??n??n??n??n??OcclusionRelativeSizeRelativeDensityBinocularDisparityAccommodationConvergenceMotionPerspectiveNearFieldDepthCuesn??n??n??n??n??n??n??OcclusionRelativeSizeRelativeDensityBinocularDisparityAccommodationConvergenceMotionPerspectiveHowDoWeMeasureDepthPerception??Problem:perceptionisinvisible??Solution:depthjudgmenttasks??Basedoncognition–?Verbalreport??Basedonperceptionaction–?PerceptualmatchingThat’saboutameter…WhocaresLetmehittheball!–?BlindreachingPreviousworkinnearfieldARdepthperception??Rollandetal??Rollandetal??EllisMenges??McCandless,Ellis,Adelstein??Edwardsetal??Singh,Ellis,Swan,??Hua,Ellis,SwanExpI:MatchingvsReaching??Usedperceptualmatchingandblindreachingtasks??ExtendEllisMengesapparatusandtask??Effectofoccludingsurface(xrayvision)??WithinsubjectsdesignExpI:Tasksdisplayoccluder=absent,presentcalibrationjudgment=matchcrossjudgment=blindreachhydraulicjackExpI:ApparatusExpI:ResultsExperimentISEMoccluder–occluder(cm),ErrorDistance(cm)OccluderabsentpresentabsentpresentJudgmentmatchreachMatching>ReachingCalibrationExpIIRealARMatching,ReachingSimilarBiomechanicsBetweenSubjectsExpIMatchingReachingXrayVisionWithinSubjectsExpII:RealvsARcameras??ComparerealandARtargets??Compareperceptualmatchingandblindreachingjudgments??Samebiomechanicalmovementformatchingandreaching??BetweensubjectsdesignEnvironment=Real,ARTask=matchbackgroundcurtainrealworldtargetclosedloopsliderfoamridge(restrictsHMDmovement)Task=reachExpII:ResultsExperimentIIError(cm),–SEMDistance(cm)EnvironmentrealARrealARJudgmentmatchreachTheAccommodativeVergenceProblemforVRandARvergencedistancefocaldistancevergencedistancefocaldistancevergencedistancefocaldistanceNormalviewingViewingwithvergenceViewingwithfartherthanaccommodationaccommodationfartherthanvergenceExpII:DisparityChangesforARMatchingβv=α–βαβv=α–βαExperimentIISEM–(cm),ErrorDistance(cm)EnvironmentrealARrealARJudgmentmatchreachExperimentIIARMatchingvergence°Distance(cm)ExpII:ResultsExperimentIIError(cm),–SEMDistance(cm)EnvironmentrealARrealARJudgmentmatchreachMonWilliamsTresilian,figExpIIRealARMatching>ReachingMatching,ReachingCalibrationSimilarBiomechanicsBetweenSubjectsExpIMatchingReachingXrayVisionWithinSubjectsMatching>ReachingNoCalibrationMatching>ReachingExpIIICalibrationFeedbackUseFingerMatching,ReachingReal,ARPretest,Intervention,PosttestExpIII:Feedback,Proprioception??Feedback:–?Pretest,Expose,Posttestdesign–?Reach,Match,Reach–?Match,Reach,Match??PointwithFinger:–?Reachingandmatchingbothusefinger??ComparerealandARtargetsExpIII:TasksblindreachingcardboardridgeperceptualmatchingComparingExpIIandExpIIIPretestExperimentIISEM–(cm),ErrorDistance(cm)EnvironmentrealARrealARJudgmentmatchreachExperimentIIISEM–(cm),ErrorDistance()EnvironmentrealARrealARJudgmentmatchreachExpIII:Feedback(Pretest,Expose,Posttest)ExperimentIIIEnvironment=realSEM–(cm),ErrorDistance()JudgmentBlockhchchchchchcaaaetetetaaarmrmrmExperimentIIIEnvironment=ARSEM–(cm),ErrorDistance()JudgmentBlockhchchchchchcaaeatetetmaaarrmrmExpIII:PosttestResults(Reach,Match)ExperimentIII(Posttest)Error(cm),–SEMDistance()EnvironmentrealARrealARJudgmentmatchreachMatching>ReachingCalibrationExpIIRealARMatching,ReachingSimilarBiomechanicsBetweenSubjectsOverestimationARMatchingExpIOverestimationMatchingReachingARMatchingXrayVisionWithinSubjectsMatching>ReachingNoCalibrationOverestimationARMatchingMatching>ReachingExpIIICalibrationFeedbackUseFingerMatching,ReachingReal,ARPretest,Intervention,PosttestExpIVAccommodationCollimated,Consistent,Midpoint,RealYoungerBetweenSubjectsHaploscopes??CommercialHMDsdon’tallowenoughcontrol??Visionscientistshavelongbuilthaploscopes:PresentsseparatelycontrolledimagetoeacheyeBerkeleyHaploscopeHASAHaploscope(HMD)ClemsonHaploscopeHaploscope§??Adjustablefocusdisplay§??CanpresentobjectswithvaryingaccommodationandvergencedemandsfImagegeneratormnOpticsMonitorMinimizationLensCollimationLensAccommodationLenscm(Concave)(Convex)(Concave)StimulusObjectDDcmImagegeneratedbyImageisformedatcmminimizationlenscmbasedonthepoweroftheaccommodationlensEyepositionsaspivotpointsExpIV:Accommodation??EnvironmentAccommodation:–?RealConsistent–?ARCollimated–?ARConsistent–?ARMidpoint??PerceptualMatching??tocmHaploscopeEnvironment=Real,ARTask=matchExpIV:ResultsExperimentIVError(cm),–SEMDistance(cm)ConditionldnnaetteeiRtoatpsmidlinsioloMCCMatching>ReachingCalibrationExpIIRealARMatching,ReachingSimilarBiomechanicsBetweenSubjectsExpVBrightnessBright,DimCollimated,Consistent,MidpointOverestimationARMatchingExpIOverestimationMatchingReachingARMatchingXrayVisionWithinSubjectsMatching>ReachingNoCalibrationOverestimationARMatchingMatching>ReachingExpIIICalibrationFeedbackUseFingerMatching,ReachingReal,ARPretest,Intervention,PosttestExpIVAccommodationCollimated,Consistent,Midpoint,RealYoungerBetweenSubjectsYoungerBetweenSubjectsExpV:Brightness??ExpIVluminance:RealworldARExpIV–?Realworld=cdm–?AR=cdm??ExpV:–?ReplicatedExpARconditions–?dimmerobject=cdmARExpVExpV:ResultsExperimentVError(cm),–SEMDistance(cm)BrightnessatmtmtmlghighighirrDrDrDmiiiNoBBBConditionldnnaetteeitoRatpsmidlinsioloMCCMatching>ReachingCalibrationExpIIRealARMatching,ReachingSimilarBiomechanicsBetweenSubjectsExpVBrightnessBright,DimCollimated,Consistent,MidpointOverestimationARMatchingExpIOverestimationMatchingReachingARMatchingXrayVisionWithinSubjectsMatching>ReachingNoCalibrationOverestimationARMatchingMatching>ReachingExpIIICalibrationFeedbackUseFingerMatching,ReachingReal,ARPretest,Intervention,PosttestExpIVAccommodationCollimated,Consistent,Midpoint,RealYoungerBetweenSubjectsYoungerBetweenSubjectsExpVIAgeYounger,OlderCollimated,Consistent,MidpointBrightBetweenSubjectsExpVI:Age??Observers??SameasExpIV:–?RealConsistent–?ARCollimated–?ARConsistent–?ARMidpoint??UsedbrightARobjectsDuane,subjectsExperimentVI:ResultsExperimentVIError(cm),–SEMDistance(cm)AgeConditionrrrreegeegldldunOnOoouYYldaeRetaimllCorreengldOouYtentisnsCorreegldnOouYtinpoidMExpVII:ReplicateEdwardsetal()ExpVII:EffectofOccludingSurface??Introducehighlysalientoccludingsurface??Denselysamplearoundoccludingsurface??UsematchingjudgmentExpVII:ResultsSEM±Error(mm),SurfaceRelativeDepth(mm)ExpVII:ResultsSEM±Error(mm),SurfaceRelativeDepth(mm)ExpVII:LinearUnderestimationandIPDChangeSEM±Error(mm),SurfaceRelativeDepth(mm)ExpVII:EffectofIntroducingOccluderError(mm),±SEMSEM±Error(mm),SurfaceRelativeDepth(mm)SurfaceRelativeDepth(mm)SummaryofFindings??Accommodativevergencemismatchmattersbutsufficienttofocusatmidpointofworkspace??Brightnessofvirtualobjectmattersneedstobesimilartosurroundingrealobjects??Olderobserversasaccurateasyoungerobservers??PropermodelingofIPD(likely)matters??Salienceofoccludingsurface(likely)matters??VergenceangleexplainsmanydeptherrorsTheARDepthPerceptionTeam??Students:–?KennyMoser(ComputerSciencePhD)–?NatePhillips(ComputerSciencePhD)??Alumni:–?ChunyaHua(ComputerScienceMS)–?GurjotSingh(ComputerSciencePhD)–?AdamJones(UniversityofSouthernCalifornia)??Collaborators:–?StephenREllis(NASAAmes)–?ChristainSandor(UniversityofSouthAustralia)??Funding:–?NSF,NASA,OfficeofNavalResearchHowDoWeMeasureDepthPerceptioninNearFieldAugmentedRealityInspiredbyMedicalApplicationsDrJEdwardSwanIIJuneProfessorDeptofComputerScienceEngineeringAdjunctProfessorDeptofPsychology

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