Page 112 - Demo

110Chapter6experimentwasperformedwithandwithoutAR(loose-fitIGSandloose-fitAR)Intheloose-fitIGS the observerpositioned the tracked cube on theplannedpositionbyvisualfeedbackfroma2DscreenIntheloose-fitARtheobserverpositionedthetrackedcubeontheplannedpositionunderARguidancebytheHoloLens(Figure3)ThespatialdifferencebetweenthetrackedpositionofthecubeandthevirtualplannedpositionwascalculatedtodeterminetheaccuracyofobjectpositioningIntheloose-fitIGSthecombinednavigationandusererrorsweremeasuredIntheloose-fitARthecombinednavigationuser,andARvisualizationerrorsweremeasured ThesizeoftheARvisualizationerrorcouldbedeterminedbycomparingtheresultsofloose-fitIGSandloose-fitARTheexperimentswereperformedby4observerstoinvestigateinterobservervariabilityFigure3(a)3D-printedmeasuringboardandthetrackedV-shapedcube(b)Hologrampresentingtheoutlineoftheplannedpositionofthecubedisplayedonthemeasuringboard(greenoutline)(c) Thecubeisplacedattheplannedpositionindicatedbythehologram