COTS VR hardware and modern game engines create the impression that bringing even complex data into VR has become easy. In this work, we investigate to what extent game engines can support the development of immersive...
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ISBN:
(纸本)9798350348392
COTS VR hardware and modern game engines create the impression that bringing even complex data into VR has become easy. In this work, we investigate to what extent game engines can support the development of immersive visualization software with a case study. We discuss how the engine can support the development and where it falls short, e.g., failing to provide acceptable rendering performance for medium and large -sized data sets without using more sophisticated features.
This paper comprehensively explores the intersection of human-Computer Interaction (HCI), usable security, and privacy technologies within the context of the rapidly digitising African continent. Recognising the incre...
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ISBN:
(纸本)9798400708879
This paper comprehensively explores the intersection of human-Computer Interaction (HCI), usable security, and privacy technologies within the context of the rapidly digitising African continent. Recognising the increasing digitalisation in Africa, we assert the criticality of focusing on usable security and privacy features to ensure safe and meaningful user engagement. We systematically review existing literature, present five illustrative case studies across different sectors, including finance, health, education, agriculture, and internet services, and highlight their application within Africa's unique socio-cultural and economic realities. Our findings underscore the transformative potential of these technologies in enhancing user experiences, securing data, providing context-specific solutions, considering socio-cultural factors, and fostering accessibility and inclusivity. This paper argues for the vital role of user-friendly, context-specific, and culturally aware technology design in over-coming the digital divide, enhancing the adoption and trust of digital systems, and fostering an inclusive, secure digital ecosystem in Africa.
We develop an interactive approach for analyzing multi-field tensor data from simulations in close collaboration with domain scientists. Our approach is based on extensive application analysis and built around a multi...
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ISBN:
(纸本)9798350321241
We develop an interactive approach for analyzing multi-field tensor data from simulations in close collaboration with domain scientists. Our approach is based on extensive application analysis and built around a multi-field clustering addressing multiple user-defined quantities which were required by the domain scientists. Established techniques like linked views complement the approach to support reasoning while offering an overview and detailed insight into the multi-field tensor data. Further, we include an evaluation containing a real-world use case and a user study with domain scientists to demonstrate the usefulness compared to existing tools.
Augmented reality technology can integrate virtual information (objects, pictures, videos, sounds, etc.) into the real environment, enrich the real world, and build a more comprehensive and better world. Outdoor illum...
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ISBN:
(纸本)9798350348392
Augmented reality technology can integrate virtual information (objects, pictures, videos, sounds, etc.) into the real environment, enrich the real world, and build a more comprehensive and better world. Outdoor illumination is essential for AR applications. We will discuss our proposed two methods which predict outdoor illumination front a single outdoor image. With predicted illumination, the virtual object can he inserted into the real environment, with consistent shadow information and occlusion relationship.
Social meetings in Virtual Reality (VR) are fundamentally different from videoconferencing because the VR tracking data can be used to render scenes as if they were in real-time, enabling people to go back in time and...
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ISBN:
(纸本)9798350348392
Social meetings in Virtual Reality (VR) are fundamentally different from videoconferencing because the VR tracking data can be used to render scenes as if they were in real-time, enabling people to go back in time and experience discussions that they may have not attended. Moreover, the tracking data allows people to visit the meeting from any location in the room, as opposed to the single camera angle used for video conferences. The current paper describes the methodology of transforming tracking data around proxemics and head orientations of recorded avatars to nonverbally assimilate new users into a recorded scene.
The visual exploration of trajectory data is crucial in domains such as animal behavior, molecular dynamics, and transportation. With the emergence of immersive technology, trajectory data, which is often inherently t...
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ISBN:
(纸本)9798350328387
The visual exploration of trajectory data is crucial in domains such as animal behavior, molecular dynamics, and transportation. With the emergence of immersive technology, trajectory data, which is often inherently three-dimensional, can be analyzed in stereoscopic 3D, providing new opportunities for perception, engagement, and understanding. However, the interaction with the presented data remains a key challenge. While most applications depend on hand tracking, we see eye tracking as a promising yet under-explored interaction modality, while challenges such as imprecision or inadvertently triggered actions need to be addressed. In this work, we explore the potential of eye gaze interaction for the visual exploration of trajectory data within an AR environment. We integrate hand- and eye-based interaction techniques specifically designed for three common use cases and address known eye tracking challenges. We refine our techniques and setup based on a pilot user study (n=6) and find in a follow-up study (n=20) that gaze interaction can compete with hand-tracked interaction regarding effectiveness, efficiency, and task load for selection and cluster exploration tasks. However, time step analysis comes with higher answer times and task load. In general, we find the results and preferences to be user-dependent. Our work contributes to the field of immersive data exploration, underscoring the need for continued research on eye tracking interaction.
Body awareness is relevant for the efficacy of psychotherapy. However, previous work on virtual reality (VR) and avatar-assisted therapy has often overlooked it. We investigated the effect of avatar individualization ...
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ISBN:
(纸本)9798350328387
Body awareness is relevant for the efficacy of psychotherapy. However, previous work on virtual reality (VR) and avatar-assisted therapy has often overlooked it. We investigated the effect of avatar individualization on body awareness in the context of VR-specific user experience, including sense of embodiment (SoE), plausibility, and sense of presence (SoP). In a between-subject design, 86 participants embodied three avatar types and engaged in VR movement exercises. The avatars were (1) generic and gender-matched, (2) customized from a set of pre-existing options, or (3) personalized photorealistic scans. Compared to the other conditions, participants with personalized avatars reported increased SoE, yet higher eeriness and reduced body awareness. Further, SoE and SoP positively correlated with body awareness across conditions. Our results indicate that VR user experience and body awareness do not always dovetail and do not necessarily predict each other. Future research should work towards a balance between body awareness and SoE.
We present PinchLens, a new free-hand target selection technique for acquiring small and dense targets in Virtual Reality. Traditional pinch-based selection does not allow people to precisely manipulate small and dens...
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ISBN:
(纸本)9798350328387
We present PinchLens, a new free-hand target selection technique for acquiring small and dense targets in Virtual Reality. Traditional pinch-based selection does not allow people to precisely manipulate small and dense objects effectively due to tracking and perceptual inaccuracies. Our approach combines spatial magnification, an adaptive control-display gain, and visual feedback to improve selection accuracy. When a user starts the pinching selection process, a magnifying bubble expands the scale of nearby targets, an adaptive control-to-display ratio is applied to the user's hand for precision, and a cursor is displayed at the estimated pinch point for enhanced visual feedback. We performed a user study to compare our technique to traditional pinch selection and several variations to isolate the impact of each of the technique's features. The results showed that PinchLens significantly outperformed traditional pinch selection, reducing error rates from 18.9% to 1.9%. Furthermore, we found that magnification was the dominant feature to produce this improvement, while the adaptive control-display gain and visual cursor of pinch were also helpful in several conditions.
Research on trust repair in human-agent cooperation is limited, but it can mitigate trust violations and prevent- distrust. We conducted a study with 45 participants who interacted with a companion agent through mixed...
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ISBN:
(纸本)9798350348392
Research on trust repair in human-agent cooperation is limited, but it can mitigate trust violations and prevent- distrust. We conducted a study with 45 participants who interacted with a companion agent through mixed -reality interfaces while playing a language-learning quiz game. Our results showed that displaying the agent's intentions during mistake explanations helped repair trust. We also found that this had positive effects on affect, user experience, and cooperation igness. Our findings suggest that including agent intentions in mistake explanations is an effective way to repair trust in human agent interactions.
Real-world event sequence data, such as activity logs, eye-tracking data, simulation data, and electronic health records, often share characteristics such as a large alphabet of events, fragmentation, noise, and high ...
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ISBN:
(纸本)9798350321241
Real-world event sequence data, such as activity logs, eye-tracking data, simulation data, and electronic health records, often share characteristics such as a large alphabet of events, fragmentation, noise, and high complexity which makes them difficult to analyze in their raw form. Because of this, simplification and preprocessing through various data transformations are commonly required before the data can be effectively visualized and analyzed. Existing methods for such data transformation are either manually applied and rely heavily on user expertise, or use algorithmic approaches to apply bulk operations which can imply the loss of potentially important information without users being aware. To bridge this gap, we propose a visual analytics approach that aims to successively increase the quality of noisy event sequences by supporting an interactive, context-aware application of data transformations. This is achieved by providing cues concerning the potential loss of information that transformation operations may imply and allowing users to explore, and visually assess their impact on the data. Therefore, a central feature of the approach is that users can tune the data transformation process so that important identified data characteristics are preserved. We motivate the proposed approach in the domain of air traffic control and illustrate it through a usage example, using event sequences derived by merging eye-tracking and simulator data from a human-in-the-loop simulation experiment with 14 air traffic controllers.
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