Areas Papers

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    Uniview - Visualizing the Universe
    (The Eurographics Association, 2010) Klashed, Staffan; Hemingsson, Per; Emmart, Carter; Cooper, Matthew; Ynnerman, Anders; Matthew Cooper and Kari Pulli
    This paper describes the development of the software system, Uniview, the motivation behind some of the most prominent features of the system and the strengths and challenges of running a development project in such close collaboration with the users. Uniview is a sophisticated system for the visual display and exploration of the enormous and complex data which the human race has gathered about the universe. This beautiful, fascinating data, with it s sheer size both in terms of data elements and the distances between the objects in the known universe, presents challenges to the developer at all levels: from basic rendering through representation and to data managment.
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    Visualizing Climate Change: the Potential of Dome Presentations as a Tool for Climate Communication
    (The Eurographics Association, 2010) Neset, Tina-Simone S.; Wibeck, Victoria; Uhrqvist, Ola; Johansson, Jimmy; Matthew Cooper and Kari Pulli
    This study presents the outline of a climate visualization programme directed to various target groups that was presented in a dome environment. The efforts of climate and visualization researchers to jointly develop presentations for immersive environments on the cause and effect of climate change as well as potential responses both in terms of national and international policy as well as individuals lifestyles are described. Further we discuss the results of an evaluation with 64 participants of dome presentations. The results point towards an initial support for the dome visualization in terms of increased engagement of the audience. Further, visual representations such as choice of colouring and volume bar charts that were expected to be problematic by the research group were considered straightforward by the audience. In this paper we discuss visual representation and climate communication, and to what extent climate visualization in a dome environment can contribute to enhance the audience s understanding of the complexity of climate change issues.
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    In-Situ 3D Sketching Using a Video Camera as an Interaction and Tracking Device
    (The Eurographics Association, 2010) Simon, Gilles; Matthew Cooper and Kari Pulli
    In this paper, we present a novel method for in-situ 3D sketching of polyhedral scenes. A video camera is used as both an interaction and a tracking device, which makes the system particularly suitable for handheld devices such as PDAs and mobile phones. The efficiency and accuracy of the method are demonstrated using a miniature scene and a real outdoor scene.
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    A Mobile Augmented Reality System to Enjoy the Sagrada Familia
    (The Eurographics Association, 2010) Gimeno-Sancho, Jesus; Pardo-Carpia, Fernando; Morillo-Tena, Pedro; Fernández-Marin, Marcos; Matthew Cooper and Kari Pulli
    SAFAR is a mobile Augmented Reality application that makes possible to see in real-time the Sagrada Familia as it will look like when it be finished. The application successfully integrates outdoor tracking and 3D rendering processes to provide an augmented view of this under construction monument to city travellers, equipped with Nokia mobile phones. This outdoor tracking process includes a custom skyline detection algorithm, which provides real-time tracking and avoids not only external calibrations, but also additional sensors connected to the mobile phone. Moreover, the occlusion problem of the resulting images are improved by means of predefined drawings sequences, which control the combination between computer-generated and displayed video images. The performance evaluation results show that both the outdoor tracking and the 3D rendering techniques combined in SAFAR requires relatively low computational load, while providing a proper accuracy.
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    Towards an Academic Praxis for Domed Virtual Environments
    (The Eurographics Association, 2010) Carss, Peter; Matthew Cooper and Kari Pulli
    This paper sets out the current state of activities for the domed virtual environment located within the University of Plymouth, UK. Some of these activities have arisen through reactions to demands on the dome. Some, particularly those concerning students education, have arisen by design. The paper describes the theoretical frameworks, curricula, methodologies and tools that have emerged, and suggests that these are first steps towards what might be termed a praxis of domed virtual environments.
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    DomeView: A Tool for Digital Planetariums
    (The Eurographics Association, 2010) Silva, M. A.; Fernandes, António Ramires; Pedrosa, A.; Matthew Cooper and Kari Pulli
    The content produced for fulldome projection is usually made in a frame (the master) with a format corresponding to a projection of the dome on a plane, commonly the fisheye projection. Due to the distortions involved, looking at the master does not give a clear idea of the final result once projected on a planetarium dome. The common solution when creating and composing content is to go through an iterative process, making successive projections on a planetarium until the desired result is achieved. However, repeated access to a planetarium is difficult, costly, and time consuming. So there is a need for an application that can provide the user with a clear notion of the final result in the planetarium. In addition, if the application could be used to show content in a small (single projector) planetarium, like a portable one, its versatility would increase substantially. This paper reports on such an application: Domeview.
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    Interactive 3D Stereoscopic Dome with Automatic Calibration
    (The Eurographics Association, 2010) Dingeldey, Felix; Schiewe, Manuel; Gerhardt, Jérémie; Ahlers, Kay-Ingo; Haulsen, Ivo; Matthew Cooper and Kari Pulli
    In recent years, the advances in projection technology and the increasing rendering capacity of modern computers allowed the development of immersive digital domes. Digital dome systems are not limited to planetariums, but also find their way into science centers, theme parks, or multimedia events. However, most installations do not support 3D stereoscopic display, because of the difficulties the curved projection surface implies. In this paper, we present both the construction of a small 3D stereoscopic dome and a versatile multi-projector system that exploits the capabilities digital technology offers today. Our system performs automatic geometric and color projector calibration as well as soft-edge blending. Moreover, it implements real time media compositing, which allows enhancing dome viewing experiences and going beyond the simple playout of pre-rendered content by enabling user interaction.
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    Ad-Hoc Multi-Displays for Mobile Interactive Applications
    (The Eurographics Association, 2010) Schmitz, Arne; Li, Ming; Schönefeld, Volker; Kobbelt, Leif; Matthew Cooper and Kari Pulli
    We present a framework which enables the combination of different mobile devices into one multi-display such that visual content can be shown on a larger area consisting, e.g., of several mobile phones placed arbitrarily on the table. Our system allows the user to perform multi-touch interaction metaphors, even across different devices, and it guarantees the proper synchronization of the individual displays with low latency. Hence from the user s perspective the heterogeneous collection of mobile devices acts like one single display and input device. From the system perspective the major technical and algorithmic challenges lie in the co-calibration of the individual displays and in the low latency synchronization and communication of user events. For the calibration we estimate the relative positioning of the displays by visual object recognition and an optional manual calibration step.
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    Progress in Rendering and Modeling for Digital Planetariums
    (The Eurographics Association, 2010) Magnor, Marcus; Sen, Pradeep; Kniss, Joe; Angel, Edward; Wenger, Stephan; Matthew Cooper and Kari Pulli
    Contemporary challenges in the production of digital planetarium shows include real-time rendering realism as well as the creation of authentic content. While interactive, live performance is a standard feature of professional digital-dome planetarium software today, support for physically correct rendering of astrophysical phenomena is still often limited. Similarly, the tools currently available for planetarium show production do not offer much assistance towards creating scientifically accurate models of astronomical objects. Our paper presents recent results from computer graphics research, offering solutions to contemporary challenges in digital planetarium rendering and modeling. Incorporating these algorithms into the next generation of dome display software and production tools will help advance digital planetariums toward make full use of their potential.