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Towards convergence in a virtual environment: omnidirectional movement, physical feedback, social interaction and vision
Örebro University, School of Science and Technology. (Centre for Applied Autonomous Sensor Systems (AASS), Örebro university,Sweden)
University of Skövde.
(English)Manuscript (preprint) (Other academic)
Abstract [en]

Movement, physical feedback, social interaction and vision are important factors for humans in the real world, and therefore also in a virtual world whose aim is to mimic the real world. The effect of a virtual environment application could increase through the use of a human-computer interface that can match natural human capability in such areas, and several novel components are presented herein. Here, movement and feedback is gained through an omnidirectional walking surface that enables untethered movement throughout a virtual world without imposing physical restrictions. Although several different approaches exist to the mechanical problem of two-dimensional translation, an alternative top-down approach can reduce complexity to one-dimensional space. Furthermore, interchange of subtle body language can be vital and achieved with a system that supports high fidelity in virtual texture representation of users, which can be more powerful in some cases than virtual geometry. Also, a new approach is taken to the design of a head mounted display with minimal weight through optics in the form of soft contact lenses, mounted directly on the eyes.

National Category
Robotics
Research subject
Computer and Systems Science
Identifiers
URN: urn:nbn:se:oru:diva-21067OAI: oai:DiVA.org:oru-21067DiVA, id: diva2:477431
Available from: 2012-01-13 Created: 2012-01-13 Last updated: 2017-10-17Bibliographically approved
In thesis
1. Convergence in mixed reality-virtuality environments: facilitating natural user behavior
Open this publication in new window or tab >>Convergence in mixed reality-virtuality environments: facilitating natural user behavior
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis addresses the subject of converging real and virtual environments to a combined entity that can facilitate physiologically complying interfaces for the purpose of training. Based on the mobility and physiological demands of dismounted soldiers, the base assumption is that greater immersion means better learning and potentially higher training transfer. As the user can interface with the system in a natural way, more focus and energy can be used for training rather than for control itself. Identified requirements on a simulator relating to physical and psychological user aspects are support for unobtrusive and wireless use, high field of view, high performance tracking, use of authentic tools, ability to see other trainees, unrestricted movement and physical feedback. Using only commercially available systems would be prohibitively expensive whilst not providing a solution that would be fully optimized for the target group for this simulator. For this reason, most of the systems that compose the simulator are custom made to facilitate physiological human aspects as well as to bring down costs. With the use of chroma keying, a cylindrical simulator room and parallax corrected high field of view video see-though head mounted displays, the real and virtual reality are mixed. This facilitates use of real tool as well as layering and manipulation of real and virtual objects. Furthermore, a novel omnidirectional floor and thereto interface scheme is developed to allow limitless physical walking to be used for virtual translation. A physically confined real space is thereby transformed into an infinite converged environment. The omnidirectional floor regulation algorithm can also provide physical feedback through adjustment of the velocity in order to synchronize virtual obstacles with the surrounding simulator walls. As an alternative simulator target use, an omnidirectional robotic platform has been developed that can match the user movements. This can be utilized to increase situation awareness in telepresence applications.

Place, publisher, year, edition, pages
Örebro: Örebro universitet, 2012. p. 71
Series
Örebro Studies in Technology, ISSN 1650-8580 ; 53
Keywords
Mixed reality. augmented reality, augmented virtuality, head mounted display, omnidirectional floor, natural interface, telepresence
National Category
Computer and Information Sciences
Research subject
Computer and Systems Science
Identifiers
urn:nbn:se:oru:diva-21054 (URN)978-91-7668-852-6 (ISBN)
Public defence
2012-02-10, Hörsal L1, Långhuset, Örebro universitet, Fakultetsgatan 1, Örebro, 11:15 (Swedish)
Opponent
Supervisors
Available from: 2012-01-12 Created: 2012-01-12 Last updated: 2018-01-12Bibliographically approved

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Citation style
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