Browsing by Author "Grubert, Jens"

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    Grand Challenges in Immersive Analytics
    (ACM : New York, New York, 2021-05-08) Ens, Barrett; Bach, Benjamin; Cordeil, Maxime; Engelke, Ulrich; Serrano, Marcos; Willett, Wesley; Prouzeau, Arnaud; Anthes, Christoph; Büschel, Wolfgang; Dunne, Cody; Dwyer, Tim; Grubert, Jens; Haga, Jason H.; Kirschenbaum, Nurit; Kobayashi, Dylan; Lin, Tica; Olaosebikan, Monsurat; Pointecker, Fabian; Saffo, David; Saquib, Nazmus; Schmalsteig, Dieter; Szafir, Danielle Albers; Whitlock, Matthew; Yang, Yalong
    Immersive Analytics is a quickly evolving field that unites several areas such as visualisation, immersive environments, and human-computer interaction to support human data analysis with emerging technologies. This research has thrived over the past years with multiple workshops, seminars, and a growing body of publications, spanning several conferences. Given the rapid advancement of interaction technologies and novel application domains, this paper aims toward a broader research agenda to enable widespread adoption. We present 17 key research challenges developed over multiple sessions by a diverse group of 24 international experts, initiated from a virtual scientific workshop at ACM CHI 2020. These challenges aim to coordinate future work by providing a systematic roadmap of current directions and impending hurdles to facilitate productive and effective applications for Immersive Analytics.
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    Interacting with Stroke-Based Rendering on a Wall Display
    (2007-10-19) Grubert, Jens; Hancock, Mark; Carpendale, Sheelagh; Tse, Edward; Isenberg, Tobias
    We introduce two new interaction techniques for creating and interacting with non-photorealistic images using strokebased rendering. We provide bimanual control of a large interactive canvas through both remote pointing and direct touch. Remote pointing allows people to sit and interact at a distance with an overview of the entire display, while direct-touch interaction provides more precise control. We performed a user study to compare these two techniques in both a controlled setting with constrained tasks and an exploratory setting where participants created their own painting. We found that, although the direct-touch interaction outperformed remote pointing, participants had mixed preferences and did not consistently choose one or the other to create their own painting. Some participants also chose to switch between techniques to achieve different levels of precision and control for different tasks.
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    Interactive Stroke-Based NPR using Hand Postures on Large Displays
    (2007-12-10) Grubert, Jens; Carpendale, Sheelagh; Isenberg, Tobias
    We explore the use of hand postures to interact with stroke-based rendering (SBR) on touch-sensitive large displays. In contrast to traditional WIMP interfaces, we allow people to directly engage with and influence a rendering. Our system allows the creation of new stroke primitives as well as provides mechanisms to distribute and then manipulate them on the canvas. We offer a set of natural mappings from hand postures to rendering parameterizations. The resulting system allows an intuitive exploration of SBR without the need for traditional desktop interfaces.