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@article{2425898,
author = {Alharbi, Ruwayda and Strnad, Ondřej and Luidolt, Laura R and Waldner, Manuela and Kouřil, David and Bohak, Ciril and Klein, Tobias and Groeller, Eduard and Viola, Ivan},
article_location = {Los Alamitos},
article_number = {3},
doi = {http://dx.doi.org/10.1109/TVCG.2021.3133592},
keywords = {VR immersive; visibility management; path planning; storytelling; visualization},
language = {eng},
issn = {1077-2626},
journal = {IEEE transactions on visualization and computer graphics},
title = {Nanotilus: Generator of Immersive Guided-Tours in Crowded 3D Environments},
url = {http://dx.doi.org/10.1109/TVCG.2021.3133592},
volume = {29},
year = {2023}
}
TY - JOUR
ID - 2425898
AU - Alharbi, Ruwayda - Strnad, Ondřej - Luidolt, Laura R - Waldner, Manuela - Kouřil, David - Bohak, Ciril - Klein, Tobias - Groeller, Eduard - Viola, Ivan
PY - 2023
TI - Nanotilus: Generator of Immersive Guided-Tours in Crowded 3D Environments
JF - IEEE transactions on visualization and computer graphics
VL - 29
IS - 3
SP - 1860-1875
EP - 1860-1875
PB - IEEE Computer Society
SN - 10772626
KW - VR immersive
KW - visibility management
KW - path planning
KW - storytelling
KW - visualization
UR - http://dx.doi.org/10.1109/TVCG.2021.3133592
N2 - Immersive virtual reality environments are gaining popularity for studying and exploring crowded three-dimensional structures. When reaching very high structural densities, the natural depiction of the scene produces impenetrable clutter and requires visibility and occlusion management strategies for exploration and orientation. Strategies developed to address the crowdedness in desktop applications, however, inhibit the feeling of immersion. They result in nonimmersive, desktop-style outside-in viewing in virtual reality. This article proposes Nanotilus-a new visibility and guidance approach for very dense environments that generates an endoscopic inside-out experience instead of outside-in viewing, preserving the immersive aspect of virtual reality. The approach consists of two novel, tightly coupled mechanisms that control scene sparsification simultaneously with camera path planning. The sparsification strategy is localized around the camera and is realized as a multi-scale, multi-shell, variety-preserving technique. When Nanotilus dives into the structures to capture internal details residing on multiple scales, it guides the camera using depth-based path planning. In addition to sparsification and path planning, we complete the tour generation with an animation controller, textual annotation, and text-to-visualization conversion. We demonstrate the generated guided tours on mesoscopic biological models - SARS-CoV-2 and HIV. We evaluate the Nanotilus experience with a baseline outside-in sparsification and navigational technique in a formal user study with 29 participants. While users can maintain a better overview using the outside-in sparsification, the study confirms our hypothesis that Nanotilus leads to stronger engagement and immersion.
ER -
ALHARBI, Ruwayda, Ondřej STRNAD, Laura R LUIDOLT, Manuela WALDNER, David KOUŘIL, Ciril BOHAK, Tobias KLEIN, Eduard GROELLER and Ivan VIOLA. Nanotilus: Generator of Immersive Guided-Tours in Crowded 3D Environments. \textit{IEEE transactions on visualization and computer graphics}. Los Alamitos: IEEE Computer Society, 2023, vol.~29, No~3, p.~1860-1875. ISSN~1077-2626. Available from: https://dx.doi.org/10.1109/TVCG.2021.3133592.
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