Complexity and Occlusion Management for the World-in-Miniature Metaphor

Trueba, Ramón; Andújar, Carlos; Argelaguet, Ferran

doi:10.1007/978-3-642-02115-2_13

Cited by 20 publications

(6 citation statements)

References 15 publications

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“…2. WIM is known to have complexity and occlusion management issues [29] and large scale nature of urban scene can make them worse. WIM has only been tested in small city with very few blocks [28] and it remains an unsolved problem for applying WIM in the large-scale urban scene.…”

Section: Related Workmentioning

confidence: 99%

UrbanRama: Navigating Cities in Virtual Reality

Chen,

Miranda,

Ferreira

et al. 2021

Preprint

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Exploring large virtual environments, such as cities, is a central task in several domains, such as gaming and urban planning. VR systems can greatly help this task by providing an immersive experience; however, a common issue with viewing and navigating a city in the traditional sense is that users can either obtain a local or a global view, but not both at the same time, requiring them to continuously switch between perspectives, losing context and distracting them from their analysis. In this paper, our goal is to allow users to navigate to points of interest without changing perspectives. To accomplish this, we design an intuitive navigation interface that takes advantage of the strong sense of spatial presence provided by VR. We supplement this interface with a perspective that warps the environment, called UrbanRama, based on a cylindrical projection, providing a mix of local and global views. The design of this interface was performed as an iterative process in collaboration with architects and urban planners. We conducted a qualitative and a quantitative pilot user study to evaluate UrbanRama and the results indicate the effectiveness of our system in reducing perspective changes, while ensuring that the warping doesn't affect distance and orientation perception.

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Section: Related Workmentioning

confidence: 99%

UrbanRama: Navigating Cities in Virtual Reality

Chen,

Miranda,

Ferreira

et al. 2021

Preprint

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“…Chittaro et al (2005) propose an extension of the WIM to facilitate quick inspection of virtual buildings, allowing users to explore any floor of a building without having to navigate. Trueba, Andujar, and Argelaguet (2009) handle occlusion through a layered depth image built, every frame, from a set of planes approximating the room surrounding the user. Their approach provides clear views for single rooms, but only one level of scale is provided as the WIM is always restricted to match the current room.…”

Section: Worlds In Miniaturementioning

confidence: 99%

Hand-Based Disocclusion for the World-in-Miniature Metaphor

Andújar

2010

Presence: Teleoperators and Virtual Environments

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The world-in-miniature metaphor (WIM) allows users to select, manipulate, and navigate efficiently in virtual environments. In addition to the first-person perspective offered by typical virtual reality (VR) applications, the WIM offers a second dynamic viewpoint through a hand-held miniature copy of the environment. In this paper we explore different strategies to allow the user to interact with the miniature replica at multiple levels of scale. Unlike competing approaches, we support complex indoor environments by explicitly handling occlusion. We discuss algorithms for selecting the part of the scene to be included in the replica, and for providing a clear view of the region of interest. Key elements of our approach include an algorithm to recompute the active region from a subdivision of the scene into cells, and a view-dependent algorithm to cull occluding geometry. Our cutaway algorithm is based on a small set of slicing planes roughly oriented along the main occluding surfaces, along with depthbased revealing for nonplanar geometry. We present the results of a user study showing that our technique clearly outperforms competing approaches on spatial tasks performed in densely occluded scenes.

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“…Although several valuable extensions to VR-based WIM techniques have been introduced recently [Wingrave et al 2006;Trueba et al 2009], these have been applied only to architectural models and cityscapes. Determining how best to utilize WIMs to navigate and explore complex scientific volume datasets, while supporting both overview and detail views of the data, remains an open problem.…”

Section: Figurementioning

confidence: 99%

“…Operations that are difficult to perform in the large-scale world (navigating a great distance, selecting/manipulating an object that is far away) can be done easily in the WIM. To this core concept and related interaction techniques, researchers have more recently added features to support scaling and scrolling the WIM for use in very large environments [Wingrave et al 2006] and automatic selection of optimal WIM views, including handling issues of occlusion, for use in complex architectural models where the 3D structure of the model can be analyzed algorithmically [Trueba et al 2009]. Although this recent research has focused on architectural/geospatial applications, scale and occlusion are also important considerations when working with scientific volume datasets.…”

Section: World-in-miniature Interfacesmentioning

confidence: 99%

Slice WIM

Coffey

Malbraaten

et al. 2011

Symposium on Interactive 3D Graphics and Games

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We present Slice WIM, a method for overview+detail visualization of volume datasets that explores the potential of new interfaces made possible by a virtual reality (VR) environment made of two display surfaces: an interactive multi-touch table, and a stereoscopic display wall. Slice WIM displays a miniature version of the 3D dataset within a head-tracked stereoscopic view such that it appears to float directly above the multi-touch table. Multitouch gestures on the table are then used to navigate through the dataset and to set slices (cutting planes) through the data. Leveraging the unique table+wall hardware setup, horizontal slices through the data are projected (like a shadow) down onto the table surface, providing a useful 2D data overview to complement the 3D views as well as a data context for interpreting 2D multi-touch gestures made on the table. We demonstrate several strategies for interacting with 2D "shadow slices" on the table surface as a method for controlling the WIM and exploring volumetric datasets. Applications of the interface to explore two different volume datasets are presented, and design decisions and limitations are discussed along with feedback from both casual users and domain scientists. *

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Complexity and Occlusion Management for the World-in-Miniature Metaphor

Cited by 20 publications

References 15 publications

UrbanRama: Navigating Cities in Virtual Reality

UrbanRama: Navigating Cities in Virtual Reality

Hand-Based Disocclusion for the World-in-Miniature Metaphor

Slice WIM

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