Perception and Mental Rotation of 3D-Freeform Surfaces in an Immersive Projection System

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dc.contributor.authorGaggioli, Andreaen_US
dc.contributor.authorBreining, Ralfen_US
dc.contributor.editorB. Froehlich and J. Deisinger and H.-J. Bullingeren_US
dc.date.accessioned2014-01-27T09:38:51Z
dc.date.available2014-01-27T09:38:51Z
dc.date.issued2001en_US
dc.description.abstractThis paper reports on three experiments performed to examine the effects of different visualization techniques of 3D computer-generated freeform surfaces on subjects perceptual and cognitive performance while doing CADrelated activities in an immersive VR system. Experimental perceptual and cognitive tasks included depth size estimation of a single 3D object (exp. 1), estimation of depth differences between two 3D objects (exp. 2) and mental rotation of 3D objects (exp. 3). Dependent variables were accuracy (exp. 1, 2 and 3) and response time (exp. 3). The visualization techniques we investigated were presence versus absence of binocular disparity, four different types of graphic image (wireframe, flat shading, Gouraud shading and Gouraud shading with surface normals) and two levels of shape complexity. Results showed a positive effect of binocular disparity on perceptual performance (esp. 1), in particular when concave 3D shapes were used as stimuli (esp. 2), but a limited positive effect of stereopsis on mental rotation. Furthermore, results indicated that subjects were faster in mentally rotating 3D shapes rendered with more realistic techniques, whereas perceptual estimates were found more accurate and easier when observers were presented with less realistic rendered surfaces (exp. 1-2).en_US
dc.description.seriesinformationEurographics Workshop on Virtual Environmentsen_US
dc.identifier.isbn3211836713en_US
dc.identifier.issn1727-530Xen_US
dc.identifier.urihttps://doi.org/10.2312/EGVE/EGVE01/071-082en_US
dc.publisherThe Eurographics Associationen_US
dc.titlePerception and Mental Rotation of 3D-Freeform Surfaces in an Immersive Projection Systemen_US
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EGVE01: 7th EG Workshop on Virtual Environments, 5th Immersive Projection Technology Workshop