TY - CHAP A1 - Ryskeldiev, Bektur A1 - Cohen, Michael A1 - Herder, Jens T1 - Applying rotational tracking and photospherical imagery to immersive mobile telepresence and live video streaming groupware T2 - Proceeding SA '17 SIGGRAPH Asia 2017 Mobile Graphics & Interactive Applications, Article No. 5 N2 - Mobile live video streaming is becoming an increasingly popular form of interaction both in social media and remote collaboration scenarios. However, in most cases the streamed video does not take mobile devices' spatial data into account (e.g., the viewers do not know the spatial orientation of a streamer), or use such data only in specific scenarios (e.g., to navigate around a spherical video stream). KW - spatial media KW - rotational tracking KW - mixed reality KW - live streaming KW - social media KW - telepresence KW - mobile computing KW - groupware KW - photospherical imagery Y1 - 2017 UR - https://dl.acm.org/citation.cfm?doid=3132787.3132813 SN - 978-1-4503-5410-3 U6 - https://doi.org/10.1145/3132787.3132813 PB - ACM CY - New York ER - TY - CHAP A1 - Herder, Jens A1 - Cohen, Michael ED - Gorayska, Barbara ED - Nehaniv, Chrystopher L. ED - Marsh, Jonathon P. T1 - Enhancing Perspicuity of Objects in Virtual Reality Environments T2 - Proceedings, Second International Conference on Cognitive Technology N2 - In an information-rich Virtual Reality (VR) environment, the user is immersed in a world containing many objects providing that information. Given the finite computational resources of any computer system, optimization is required to ensure that the most important information is presented to the user as clearly as possible and in a timely fashion. In particular, what is desired are means whereby the perspicuity of an object may be enhanced when appropriate. An object becomes more perspicuous when the information it provides to the user becomes more readily apparent. Additionally, if a particular object provides high-priority information, it would be advantageous to make that object obtrusive as well as highly perspicuous. An object becomes more obtrusive if it draws attention to itself (or equivalently, if it is hard to ignore). This paper describes a technique whereby objects may dynamically adapt their representation in a user's environment according to a dynamic priority evaluation of the information each object provides. The three components of our approach are: - an information manager that evaluates object information priority, - an enhancement manager that tabulates rendering features associated with increasing object perspicuity and obtrusion as a function of priority, and - a resource manager that assigns available object rendering resources according to features indicated by the enhancement manager for the priority set for each object by the information manager. We consider resources like visual space (pixels), sound spatialization channels (mixels), MIDI/audio channels, and processing power, and discuss our approach applied to different applications. Assigned object rendering features are implemented locally at the object level (e.g., object facing the user using the billboard node in VRML 2.0) or globally, using helper applications (e.g., active spotlights, semi-automatic cameras). KW - autonomous actors KW - obtrusion KW - perspicuity KW - spatial media KW - spatialization KW - user interface design man-machine interfaces KW - Virtual Reality Y1 - 1997 SN - 0-8186-8084-9 SP - 228 EP - 237 PB - IEEE CY - Los Alamitos ER -