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检索条件"主题词=Human-centered computing"

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Smart choices for Deviceless and Device-based Manipulation in Immersive Virtual Reality 25

Smart choices for Deviceless and Device-based Manipulation i...

引用

25th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Caputo, Fabio M. Mendes, Daniel Bonetti, Alessia Saletti, Giacomo Giachetti, Andrea Univ Verona Verona Italy INESC ID Lisboa Lisbon Portugal

ISBN: (纸本)9781538633656

The choice of a suitable method for object manipulation is one of the most critical aspects of virtual environment design. It has been shown that different environments or applications might benefit from direct manipulation approaches, while others might be more usable with indirect ones, exploiting, for example, three dimensional virtual widgets. When it comes to mid-air interactions, the success of a manipulation technique is not only defined by the kind of application but also by the hardware setup, especially when specific restrictions exist. In this paper we present an experimental evaluation of different techniques and hardware for mid-air object manipulation in immersive virtual environments (IVE). We compared task performances using both deviceless and device-based tracking solutions, combined with direct and widget-based approaches. We also tested, in the case of freehand manipulation, the effects of different visual feedback, comparing the use of a realistic virtual hand rendering with a simple cursor-like visualization.

关键词： human-centered computing Interaction techniques human-centered computing User studies human-centered computing HCI design and evaluation methods human-centered computing Virtual reality

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Interacting with Distant Objects in Augmented Reality 25

Interacting with Distant Objects in Augmented Reality

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25th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Whitlock, Matt Hanner, Ethan Brubaker, Jed R. Kane, Shaun Szafir, Danielle Albers Univ Colorado Boulder Boulder CO 80309 USA

ISBN: (纸本)9781538633656

Augmented reality (AR) applications can leverage the full space of an environment to create immersive experiences. However, most empirical studies of interaction in AR focus on interactions with objects close to the user, generally within arms reach. As objects move farther away, the efficacy and usability of different interaction modalities may change. This work explores AR interactions at a distance, measuring how applications may support fluid, efficient, and intuitive interactive experiences in room-scale augmented reality. We conducted an empirical study (N = 20) to measure trade-offs between three interaction modalities-multimodal voice, embodied freehand gesture, and handheld devices-for selecting, rotating, and translating objects at distances ranging from 8 to 16 feet (2.4m-4.9m). Though participants performed comparably with embodied freehand gestures and handheld remotes, they perceived embodied gestures as significantly more efficient and usable than device-mediated interactions. Our findings offer considerations for designing efficient and intuitive interactions in room-scale AR applications.

关键词： human-centered computing Interaction design Interaction design process and methods User interface design

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In-Car 6-DoF Mixed Reality for Rear-Seat and Co-Driver Entertainment 25

In-Car 6-DoF Mixed Reality for Rear-Seat and Co-Driver Enter...

引用

25th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Haeling, Jonas Winkler, Christian Leenders, Stephan Kesselheim, Daniel Hildebrand, Axel Necker, Marc Daimler AG Stuttgart Germany Daimler Prot GmbH Leinfelden Echterdingen Germany

ISBN: (纸本)9781538633656

Conventional VR tracking methods inside a driving vehicle fail out-of-the-box. We present two novel tracking solutions for experiencing a virtual scene on a head-mounted display in a moving vehicle. We leverage advanced vehicle positioning via sensor fusion of existing car sensors to extract an accurate vehicle pose, which we use to mirror car movements virtually. For 6-DoF head-tracking, we exploit IMU-only tracking for two separate approaches - with and without additional hardware. The virtual car, in which the demo user is situated, moves in a virtual urban scene with diverse and appealing VR scenery generated from real world map data.

关键词： human-centered computing Mixed / augmented reality human-centered computing Virtual reality

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Augmented Reality-Based Personalized Virtual Operative Anatomy for Neurosurgical Guidance and Training 25

Augmented Reality-Based Personalized Virtual Operative Anato...

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25th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Si, Weixin Liao, Xiangyun Wang, Qiong Heng, Pheng-Ann Chinese Acad Sci Shenzhen Inst Adv Technol Beijing Peoples R China Chinese Univ Hong Kong Dept Comp Sci & Engn Hong Kong Peoples R China

ISBN: (纸本)9781538633656

This paper presents a novel augmented reality (AR) interactive environment for neurosurgical training. Comparing with traditional virtual reality based neurosurgical simulator, our system provides a more natural and intuitive fashion for surgeons. To achieve holographic visualization of virtual brain on 3D-printed skull (workspace), the first step is to reconstruct the personalized anatomy structure from segmented MR imaging. Then, tailored to the computational power of HoloLens, we employ the mass-spring method to model the mechanical response of brain. After that, a precise registration method is employed to map the virtual-real spatial information, which can overlay the virtual operative brain on workspace. In addition, bimanual haptic interface is also integrated into our simulator, which is more similar with real neurosurgery. In experiments, we conduct accuracy validation on our registration method, as well as the validity test on the developed simulators. The results demonstrate that our simulator can provide high-accuracy augmented visualization effects and deep immersion for novice surgeons.

关键词： human-centered computing Visualization Visualization techniques Augmented reality human-centered computing Visualization Surgical simulation

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VR-Assisted vs Video-Assisted Teacher Training 25

VR-Assisted vs Video-Assisted Teacher Training

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25th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Lugrin, Jean-Luc Oberdoerfer, Sebastian Latoschik, Marc Erich Wittmann, Alice Seufert, Christian Grafe, Silke Univ Wurzburg HCI Grp Wurzburg Germany Univ Wurzburg Chair Sch Pedag Wurzburg Germany

This paper compares teacher training in Virtual Reality (VR) to traditional approaches based on videos analysis and reflections. Our VR-assisted teacher training targets classroom management (CM) skills, using a low c... 详细信息

ISBN: (纸本)9781538633656

关键词： human-centered computing human computer interaction (HCI) Interaction paradigms irtual reality

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WoaH: A Virtual Reality Work-at-Height Simulator 25

WoaH: A Virtual Reality Work-at-Height Simulator

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25th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Di Loreto, Cedric Chardonnet, Jean-Remy Ryard, Julien Rousseau, Alain UBFC Inst Image HESAM LISPENArts & Metiers Toulon France Enedis Bourgogne Dijon France

ISBN: (纸本)9781538633656

We present WoaH, a virtual reality work-at-height simulator aimed at (i) testing whether future workers are able to manage their stress when high up and thus easily detect susceptibility to vertigo, and (ii) training in a typical work-at-height engineering operation. The simulator is composed of a real ladder synchronized in position with a virtual one placed 11 meters above the ground in a virtual environment. Visualization is done through a head-mounted display (HMD). We conducted a first user study evaluating our simulator in terms of cybersickness, perceived realism and anxiety, through both subjective (questionnaires) and objective (electrodermal activity) measurements, and testing whether vibratory cues could enhance the level of anxiety felt. Results indicate that WoaH generates anxiety as expected and is perceived as realistic. Adding vibrations had significant impact on the perceived realism but not on the electro-dermal activity. These first results bring insights to future developments for a deployment in companies dealing with work at height.

关键词： human-centered computing human computer interaction (HCI) Interaction paradigms Virtual reality Software and its engineering Software organization and properties Virtual worlds software Virtual worlds training simulations

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Preliminary Environment Mapping for Redirected Walking 25

Preliminary Environment Mapping for Redirected Walking

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25th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Hirt, Christian Zank, Markus Kunz, Andreas Swiss Fed Inst Technol Innovat Ctr Virtual Real Zurich Switzerland

ISBN: (纸本)9781538633656

Redirected walking applications allow a user to explore large virtual environments in a smaller physical space by employing so-called redirection techniques. To further improve the immersion of a virtual experience, path planner algorithms were developed which choose redirection techniques based on the current position and orientation of the user. In order to ensure a reliable performance, planning algorithms depend on accurate position tracking using an external tracking system. However, the disadvantage of such a tracking method is the time-consuming preparation of the physical environment which renders the system immobile. A possible solution to eliminate this dependency is to replace the external tracking system with a state-of-the-art inside-out tracker based on the concept of Simultaneous Localization and Mapping (SLAM). In this paper, we present an approach in which we attach a commercially available SLAM device to a head-mounted display to track the head motion of a user. From sensor recordings of the device, we construct a map of the surrounding environment for future processing in an existing path planner for redirected walking.

关键词： human-centered computing Virtual reality computing methodologies Tracking

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Interactive Exploration Assistance for Immersive Virtual Environments Based on Object Visibility and Viewpoint Quality 25

Interactive Exploration Assistance for Immersive Virtual Env...

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25th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Freitag, Sebastian Weyers, Benjamin Kuhlen, Torsten W. Rhein Westfal TH Aachen Visual Comp Inst JARA HPC Aachen Germany

ISBN: (纸本)9781538633656

During free exploration of an unknown virtual scene, users often miss important parts, leading to incorrect or incomplete environment knowledge and a potential negative impact on performance in later tasks. This is addressed by wayfinding aids such as compasses, maps, or trails, and automated exploration schemes such as guided tours. However, these approaches either do not actually ensure exploration success or take away control from the user. Therefore, we present an interactive assistance interface to support exploration that guides users to interesting and unvisited parts of the scene upon request, supplementing their own, free exploration. It is based on an automated analysis of object visibility and viewpoint quality and is therefore applicable to a wide range of scenes without human supervision or manual input. In a user study, we found that the approach improves users' knowledge of the environment, leads to a more complete exploration of the scene, and is also subjectively helpful and easy to use.

关键词： human-centered computing human computer interaction Interaction paradigms Virtual reality computing methodologies Computer graphics Rendering Visibility

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The impact of an accurate vertical localization with HRTFs on short explorations of immersive virtual reality scenarios 17

The impact of an accurate vertical localization with HRTFs o...

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17th IEEE International Symposium on Mixed and Augmented Reality (ISMAR)

作者： Geronazzo, Michele Sikstrom, Erik Kleimola, Jari Avanzini, Federico de Gotzen, Amalia Serafin, Stefania Aalborg Univ Dept Architecture Design & Media Technol Aalborg Denmark Virsabi ApS Copenhagen Denmark Hefio Ltd Espoo Finland Univ Milan Dept Comp Sci Milan Italy

ISBN: (纸本)9781538674598

Achieving a full 3D auditory experience with head-related transfer functions (HRTFs) is still one of the main challenges of spatial audio rendering. HRTFs capture the listener's acoustic effects and personal perception, allowing immersion in virtual reality (VR) applications. This paper aims to investigate the connection between listener sensitivity in vertical localization cues and experienced presence, spatial audio quality, and attention. Two VR experiments with head-mounted display (HMD) and animated visual avatar are proposed: (i) a screening test aiming to evaluate the participants' localization performance with HRTFs for a non-visible spatialized audio source, and (ii) a 2 minute free exploration of a VR scene with five audiovisual sources in a both non-spatialized (2D stereo panning) and spatialized (free-field HRTF rendering) listening conditions. The screening test allows a distinction between good and bad localizers. The second one shows that no biases are introduced in the quality of the experience (QoE) due to different audio rendering methods;more interestingly, good localizers perceive a lower audio latency and they are less involved in the visual aspects.

关键词： human-centered computing Interaction paradigms Virtual reality human-centered computing Interaction devices Sound-based input / output human-centered computing Interaction techniques Auditory feedback

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Evaluation of Hand-Based Interaction for Near-Field Mixed Reality with Optical See-Through Head-Mounted Displays 25

Evaluation of Hand-Based Interaction for Near-Field Mixed Re...

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25th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Zhang, Zhenliang Cao, Benyang Weng, Dongdong Liu, Yue Wang, Yongtian Huang, Hua Beijing Inst Technol Sch Opt & Photon Beijing Engn Res Ctr Mixed Real & Adv Display Beijing 100081 Peoples R China Adv Innovat Ctr Future Visual Entertainment 4 Xitucheng Rd Beijing 100088 Peoples R China Beijing Inst Technol Sch Comp Sci Beijing 100081 Peoples R China

ISBN: (纸本)9781538633656

Hand-based interaction is one of the most widely-used interaction modes in the applications based on optical see-through head-mounted displays (OST-HMDs). In this paper, such interaction modes as gesture-based interaction (GBI) and physics-based interaction (PBI) are developed to construct a mixed reality system to evaluate the advantages and disadvantages of different interaction modes for near-field mixed reality. The experimental results show that PBI leads to a better performance of users regarding their work efficiency in the proposed tasks. The statistical analysis of T-test has been adopted to prove that the difference of efficiency between different interaction modes is significant.

关键词： human-centered computing human computer interaction (HCI) Interaction paradigms Graphical user interfaces

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