Worldlets---3D thumbnails for wayfinding in virtual environments

Elvins, T. Todd; Nadeau, David R.; Kirsh, David

doi:10.1145/263407.263504

Cited by 55 publications

(29 citation statements)

References 9 publications

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“…Needless to say, two projections are far from enough to manage occlusion in the general case, and approaches like worldlets [10] recognize this by providing for a large, unspecified number of simultaneous views of a 3D world. However, each new view has diminishing returns in terms of new visible objects, and also entails users having to allocate a part of their attention to yet another view.…”

Section: Discussionmentioning

confidence: 99%

“…The Worlds-in-Miniature technique [25] uses a miniature 3D map of the environment to support both discovery and access, worldlets [10] provide both global overview maps as well as local views optimized for detail, bird's eye views [12] combine overview and detail views of the world, and balloon force fields [9] inflate to separate occluding objects. None of these makes direct use of the view projection to improve perception; however, temporally controlled non-linear projections [23] have been used to great effect in improving navigation and perception of 3D scenes.…”

Section: Related Workmentioning

confidence: 99%

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View-projection animation for 3D occlusion management

Elmqvist

Tsigas

2007

Computers & Graphics

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Inter-object occlusion is inherent to 3D environments and is one of the challenges of using 3D instead of 2D computer graphics for visualization. Based on an analysis of this effect, we present an interaction technique for view-projection animation that reduces inter-object occlusion in 3D environments without modifying the geometrical properties of the objects themselves. The technique allows for smooth on-demand animation between parallel and perspective projection modes as well as online manipulation of view parameters, enabling the user to quickly and easily adapt the view to reduce occlusion. A user study indicates that the technique provides many of the occlusion reduction benefits of traditional camera movement, but without the need to actually change the viewpoint. We have also implemented a prototype of the technique in the Blender 3D modeler.

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Section: Discussionmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

View-projection animation for 3D occlusion management

Elmqvist

Tsigas

2007

Computers & Graphics

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“…Based on a similar concept, Evins et al proposed Worldlet [6]. A Worldlet is a miniature representation of a particular location in a VE.…”

Section: Through-the-lens Techniquesmentioning

confidence: 99%

Pano: Design and evaluation of a 360° through-the-lens technique

Clergeaud

Guitton

2017

2017 IEEE Symposium on 3D User Interfaces (3DUI)

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Figure 1: Left: Outside view of a launcher. Middle: In the little black cylinder of this launcher, an operator is working in virtual reality with an HMD. The red virtual object represents his avatar. Right: At the same time, remotely in the virtual environment, a second operator is using Pano to interact with the first operator. Thanks to Pano, he can see the entire interior of the launcher. ABSTRACTVirtual Reality experiments have enabled immersed users to perform virtual tasks in a Virtual Environment (VE). Before beginning a task, however, users must locate and select the different objects they will need in the VE. This first step is important and affects global performance in the virtual task. If a user takes too long to locate and select an object, the duration of the task is increased. Moreover, both the comfort and global efficiency of users deteriorate as search and selection time increase.We have developed Pano, a technique which reduces this time by increasing the users natural field of view. More precisely, we provide a 360 panoramic virtual image which is displayed on a specific window, called the PanoWindow. Thanks to the PanoWindow, users can perceive and interact with the part of the Virtual Environment (VE) that is behind them without any additional head or body movement. In this paper, we present two user studies with 30 and 21 participants in different VEs. For the first study, participants were invited to perform object-finding tasks with and without Pano. The second study involved position-estimating tasks in order to know if the PanoWindow image enables users to build an accurate representation of the environment. First, the results show that Pano both reduces task duration and improves user comfort. Second, they demonstrate that good object-localization accuracy can be achieved using Pano.

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“…Elvins et al (1997) introduced a navigational tool (worldlet). A worldlet is a 3D thumbnail of a landmark designed to decrease navigation time to a destination by increasing the familiarity with and recognisability of said destination.…”

Section: Artificial Cues and Landmarksmentioning

confidence: 99%