Scape: supporting stereoscopic collaboration in augmented and projective environments

Hua, Hong; Brown, L.D.; Gao, Chunyu

doi:10.1109/mcg.2004.1255811

Cited by 61 publications

(38 citation statements)

References 11 publications

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“…This issue is strongly related to the second question regarding the effects on communication and interaction; therefore both aspects are discussed altogether. Previous research indicates that personalized views are an efficient way of supporting collaborative visualization, 9,12,32,33 however they all stress the importance of shared visual references. In this study we extended this previous research into situations, where the partitioning of visualizations into disjoint personal views yields to a lack of shared visual references and where shared information relevant to solve the task is reduced to a minimum.…”

Section: Discussionmentioning

confidence: 99%

“…We find in the literature a number of references that have presented and discussed techniques for presenting personalized views to multiple simultaneous viewers of the same display space. 6,[9][10][11][12][13][14] We classify these display environments as MVDEs with independent views. 15 The MVDE used in this experiment provides four independent stereoscopic views by using pair-wise projector polarization and a rearprojection screen.…”

Section: Multi-viewer Display Environmentsmentioning

confidence: 99%

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On the Role of Visual References in Collaborative Visualization

Pettersson

Kjellin

Lind

et al. 2009

Information Visualization

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Multi-Viewer Display Environments (MVDE) provide unique opportunities to present personalized information to several users concurrently in the same physical display space. MVDEs can support correct 3D visualizations to multiple users, present correctly oriented text and symbols to all viewers and allow individually chosen subsets of information in a shared context. MVDEs aim at supporting collaborative visual analysis, and when used to visualize disjoint information in partitioned visualizations they even necessitate collaboration. When solving visual tasks collaboratively in a MVDE, overall performance is affected not only by the inherent effects of the graphical presentation but also by the interaction between the collaborating users. We present results from an empirical study where we compared views with lack of shared visual references in disjoint sets of information to views with mutually shared information. Potential benefits of 2D and 3D visualizations in a collaborative task were investigated and the effects of partitioning visualizations both in terms of task performance, interaction behavior and clutter reduction. In our study of a collaborative task that required only a minimum of information to be shared, we found that partitioned views with a lack of shared visual references were significantly less efficient than integrated views. However, the study showed that subjects were equally capable of solving the task at low error levels in partitioned and integrated views. An explorative analysis revealed that the amount of visual clutter was reduced heavily in partitioned visualization, whereas verbal and deictic communication between subjects increased. It also showed that the type of the visualization (2D/3D) affects interaction behavior strongly. An interesting result is that collaboration on complex geo-time visualizations is actually as efficient in 2D as in 3D. Information Visualization (2010) 9, 98 --114.

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Section: Discussionmentioning

confidence: 99%

Section: Multi-viewer Display Environmentsmentioning

confidence: 99%

On the Role of Visual References in Collaborative Visualization

Pettersson

Kjellin

Lind

et al. 2009

Information Visualization

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“…It was initially introduced as a 2D interaction scheme for 2D image manipulation or map navigations [3,1,18]. It was applied to the design of tangible interfaces [22], 3D interaction tools in virtual environments [20], interaction schemes for marker-based augmented reality [16], and tangible widget-based interfaces in an augmented virtual environment (AVE) [4,15,5].…”

Section: Introductionmentioning

confidence: 99%

User evaluations on form factors of tangible magic lenses

Hua

2006

2006 IEEE/ACM International Symposium on Mixed and Augmented Reality

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Magic Lens is a small inset window embedded in a large context display, which provides an alternative view to the region of interest selected from the context view. This metaphor is used for 3D visualization in our Augmented Virtual Environment infrastructure, SCAPE (Stereoscopic Collaboration in Augmented and Projective Environments), which is composed of an immersive room display for a high level of detail, life-size virtual world and a workbench display for simplified god-like view to the world. A tangible Magic Lens is used on the workbench display to allow direct and intuitive selection of continuous levels of detail, bridging the gap between the two extreme levels of detail in SCAPE.This paper presents our first step to the user evaluations of tangible Magic Lens. We conducted two sets of user evaluations, one mainly testing the lens aspect ratio, and another for the lens size. For both of the tests, two types of tasks are conducted: information gathering and relating the detailed information with the context. We found that the aspect ratio of a lens plays more important role in user preference for smaller lenses than for larger ones. Meanwhile, the size of a lens is the most important factor that affects the user performance in the two types of tasks.

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“…The use of HMPD has been recently explored extensively by several groups of researchers for a wide range of 3D visualization applications [7,8,10]. For example, Kawakami et al developed a system named X'tal Vision and proposed the concepts of object-oriented displays [8].…”

Section: Introductionmentioning

confidence: 99%

“…Parsons and Rolland proposed the HPMD technology as a tool for medical visualization [10]. Hua et al developed a collaborative infrastructure, referred to as SCAPE (the acronym of Stereoscopic Collaboration in Augmented and Projective Environments) [7].…”

Section: Introductionmentioning

confidence: 99%

A polarized head-mounted projective display

Hua

Gao

2005

Fourth IEEE and ACM International Symposium on Mixed and Augmented Reality (ISMAR'05)

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The lack of image brightness is a common problem in optical see-through head-mounted displays (OST-HMD) where a beamsplitter is required to combine views from HMD image source and the direct-view of a real world scene. This problem is further aggregated in a headmounted projective display (HMPD) due to the fact that light passes through the beamsplitter multiple times. In this paper, we present a novel design of an ultra-bright polarized head-mounted projective display (p-HMPD). The image brightness observed by a viewer theoretically is four-times brighter than existing designs. We further demonstrate a design with currently available technology that leads to a display in which the observed image is significantly brighter than existing designs. Finally, experimental results from a bench setup are presented.

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Scape: supporting stereoscopic collaboration in augmented and projective environments

Cited by 61 publications

References 11 publications

On the Role of Visual References in Collaborative Visualization

On the Role of Visual References in Collaborative Visualization

User evaluations on form factors of tangible magic lenses

A polarized head-mounted projective display

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