Assisting Spatial Referencing for Collaborative Augmented Reality

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dc.contributor.authorLi, Yuanen
dc.contributor.committeechairBowman, Douglas A.en
dc.contributor.committeememberGabbard, Joseph L.en
dc.contributor.committeememberSantos Lages, Wallaceen
dc.contributor.committeememberHollerer, Tobiasen
dc.contributor.committeememberLee, Sang Wonen
dc.contributor.departmentComputer Scienceen
dc.date.accessioned2022-05-28T08:00:31Zen
dc.date.available2022-05-28T08:00:31Zen
dc.date.issued2022-05-27en
dc.description.abstractSpatial referencing denotes the act of referring to a location or an object in space. Since it is often essential in different collaborative activities, good support for spatial referencing could lead to exceptional collaborative experience and performance. Augmented Reality (AR) aims to enhance daily activities and tasks in the real world, including various collaborations and social interactions. Good support for accurate and rapid spatial referencing in collaborative AR often requires detailed environment 3D information, which can be critical for the system to acquire as constrained by current technology. This dissertation seeks to address the issues related to spatial referencing in collaborative AR through 3D user interface design and different experiments. Specifically, we start with investigating the impact of poor spatial referencing on close-range, co-located AR collaborations. Next, we propose and evaluate different pointing ray techniques for object reference at a distance without knowledge from the physical environment. We further introduce marking techniques aiming to accurately acquire the position of an arbitrary point in 3D space that can be used for spatial referencing. Last, we provide a systematic assessment of an AR collaborative application that supports efficient spatial referencing in remote learning to demonstrate its benefit. Overall, the dissertation provides empirical evidence of spatial referencing challenges and benefits to collaborative AR and solutions to support adequate spatial referencing when model information from the environment is missing.en
dc.description.abstractgeneralPeople often exchange spatial information about objects when they work together. Example phrases include: ``put that there'', or ``pick the third object from left''. On the other hand, Augmented Reality (AR) is the technology that displays 3D information into the real world to enhance or augment reality. Scientists and technology practitioners think that AR can help people collaborate in a better way. The AR system needs to have a good understanding of the physical environment to support exchanging spatial information in the first place. However, limited by current technology, acquiring spatial information from the real world is not always possible or reliable. In this dissertation, we first illustrate the severity of insufficient environmental knowledge when collaborators sit next to each other in AR. Then we present pointing ray techniques to help AR collaborators refer to distant objects without knowing where those objects are. We further explore different marking techniques that can help the AR system calculate the position of a point in space without scanning the area. Last, we provide an AR application that supports efficient spatial information communication in remote discussion around physical objects.en
dc.description.degreeDoctor of Philosophyen
dc.format.mediumETDen
dc.identifier.othervt_gsexam:34336en
dc.identifier.urihttp://hdl.handle.net/10919/110363en
dc.language.isoenen
dc.publisherVirginia Techen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectAugmented Realityen
dc.subjectCollaborationen
dc.subjectSpatial Referencingen
dc.titleAssisting Spatial Referencing for Collaborative Augmented Realityen
dc.typeDissertationen
thesis.degree.disciplineComputer Science and Applicationsen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.nameDoctor of Philosophyen

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