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检索条件"主题词=Human-centered computing"

共 2020 条记录，以下是1871-1880 订阅

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Enhancing the Stiffness Perception of Tangible Objects in Mixed Reality Using Wearable Haptics 25

Enhancing the Stiffness Perception of Tangible Objects in Mi...

引用

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

作者： de Tinguy, Xavier Pacchierotti, Claudio Marchal, Maud Lecuyer, Anatole Univ Rennes INSA INRIA CNRSIRISA Rennes France Univ Rennes CNRS INRIA IRISA Rennes France

ISBN: (纸本)9781538633656

This paper studies the combination of tangible objects and wearable haptics for improving the display of stiffness sensations in virtual environments. Tangible objects enable to feel the general shape of objects, but they are often passive or unable to simulate several varying mechanical properties. Wearable haptic devices are portable and unobtrusive interfaces able to generate varying tactile sensations, but they often fail at providing convincing stiff contacts and distributed shape sensations. We propose to combine these two approaches in virtual and augmented reality (VR/AR), becoming able of arbitrarily augmenting the perceived stiffness of real/tangible objects by providing timely tactile stimuli at the fingers. We developed a proof-of-concept enabling to simulate varying elasticity/stiffness sensations when interacting with tangible objects by using wearable tactile modules at the fingertips. We carried out a user study showing that wearable haptic stimulation can well alter the perceived stiffness of real objects, even when the tactile stimuli are not delivered at the contact point. We illustrated our approach both in VR and AR, within several use cases and different tangible settings, such as when touching surfaces, pressing buttons and pistons, or holding an object. Taken together, our results pave the way for novel haptic sensations in VR/AR by better exploiting the multiple ways of providing simple, unobtrusive, and low-cost haptic displays.

关键词： human-centered computing human computer interaction Interaction devices Haptic devices

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Simulator Sick but still Immersed: A Comparison of Head-Object Collision Handling and their Impact on Fun, Immersion, and Simulator Sickness 25

Simulator Sick but still Immersed: A Comparison of Head-Obje...

引用

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

作者： Ziegler, Peter Roth, Daniel Knote, Andreas Kreuzer, Michael von Mammen, Sebastian Univ Wurzburg Games Engn Wurzburg Germany Univ Wurzburg Human Comp Interact Wurzburg Germany

ISBN: (纸本)9781538633656

We compared three techniques for handling head-object collisions in room-scale virtual reality (VR). We developed a game whose mechanics induce such collisions which we either addressed (1) not at all, (2) by fading the screen information to black, or (3) by restricting translation, i.e. correcting the virtual offset in such a way that no penetration occurred. We measured these conditions' impact on simulator sickness, fun, and immersion perception. We found that the translation-restricted method yielded the greatest immersion value but also contributed the most to simulator sickness.

关键词： human-centered computing Virtual Reality human-centered computing Empirical studies in visualization

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Crisis Informatics in the Anthropocene: Disasters as Matters of Care and Concern

Crisis Informatics in the Anthropocene: Disasters as Matters...

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CHI Conference on human Factors in computing Systems (CHI)

作者： Soden, Robert Univ Colorado Boulder Comp Sci Boulder CO 80301 USA

ISBN: (纸本)9781450356213

My research examines new ways of approaching the contentious and uncertain knowledge politics surrounding natural disasters and climate change. Using three case studies, focused on different locations and type of hazards, I show how current information systems and technologies reproduce and reinforce long-standing discourses that have been widely shown to be problematic by social science research on disaster. Inspired by research in the area of feminist studies of technoscience, disaster STS and HCI research into critical and participatory design, I explore novel approaches to making sense of flood hazard, earthquake damage, and sea-level rise that seek provide new ways of engaging with the complexities and uncertainties that characterize the Anthropocene.

关键词： Crisis Informatics human-centered computing Public engagement Science and technology studies

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Rethinking Redirected Walking: On the Use of Curvature Gains Beyond Perceptual Limitations and Revisiting Bending Gains 17

Rethinking Redirected Walking: On the Use of Curvature Gains...

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

作者： Rietzler, Michael Gugenheimer, Jan Hirzle, Teresa Deubzer, Martin Langbehn, Eike Rukzio, Enrico Ulm Univ Inst Media Informat Ulm Germany Hamburg Univ Human Comp Interact Grp Hamburg Germany

ISBN: (纸本)9781538674598

Redirected walling (RDW) allows virtual reality (VR) users to walk infinitely while staying inside a finite physical space through subtle shifts (gains) of the scene to redirect them back inside the volume. All prior approaches measure the feasibility of RDW techniques based on if the user perceives the manipulation, leading to rather small applicable gains. However, we treat RDW as an interaction technique and therefore use visually perceivable gains instead of using the perception of manipulation. We revisited prior experiments with focus on applied gains and additionally tested higher gains on the basis of applicability in a user study. We found that users accept curvature gains up to 20' /m, which reduces the necessary physical volume down to approximately 6x6m for virtually walking infinitely straight ahead. Our findings strife to rethink the usage of redirection from being unperceived to being applicable and natural.

关键词： human-centered computing human computer interaction (HCI) Interaction paradigms Virtual reality human-centered computing human computer interaction (HCI) HCI design and evalu ation methods User studies

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Simulated Reference Frame: A Cost-Effective Solution to Improve Spatial Orientation in VR 25

Simulated Reference Frame: A Cost-Effective Solution to Impr...

引用

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

作者： Nguyen-Vo, Thinh Riecke, Bernhard E. Stuerzlinger, Wolfgang Simon Fraser Univ Sch Interact Arts Technol Burnaby BC Canada

ISBN: (纸本)9781538633656

Virtual Reality (VR) is increasingly used in spatial cognition research, as it offers high experimental control in naturalistic multimodal environments, which is hard to achieve in real-world settings. Although recent technological advances offer a high level of photo-realism, locomotion in VR is still restricted because people might not perceive their self-motion as they would in the real world. This might be related to the inability to use embodied spatial orientation processes, which support automatic and obligatory updating of our spatial awareness. Previous research has identified the roles reference frames play in retaining spatial orientation. Here, we propose using visually overlaid rectangular boxes, simulating reference frames in VR, to provide users with a better insight into spatial direction in landmark-free virtual environments. The current mixed-method study investigated how different variations of the visually simulated reference frames might support people in a navigational search task. Performance results showed that the existence of a simulated reference frame yields significant effects on participants completion time and travel distance. Though a simulated CAVE translating with the navigator (one of the simulated reference frames) did not provide significant benefits, the simulated room (another simulated reference frame depicting a rest frame) significantly boosted user performance in the task as well as improved participants preference in the post-experiment evaluation. Results suggest that adding a visually simulated reference frame to VR applications might be a cost-effective solution to the spatial disorientation problem in VR.

关键词： human-centered computing Empirical studies in HCI

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Galaxy: Asynchronous Ray Tracing for Large High-Fidelity Visualization 8

Galaxy: Asynchronous Ray Tracing for Large High-Fidelity Vis...

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8th IEEE Symposium on Large-Scale Data Analysis and Visualization (LDAV)

作者： Abram, Greg Navratil, Paul Grossett, Pascal Rogers, David Ahrens, James Texas Adv Comp Ctr Austin TX 78758 USA Los Alamos Natl Lab Los Alamos NM USA

ISBN: (纸本)9781538668733

We present Galaxy, a fully asynchronous distributed parallel rendering engine geared towards using full global illumination for large-scale visualization. Galaxy provides performant distributed rendering of complex lighting and material models, particularly those that require ray traversal across nodes. Our design is favorable for tightly-coupled in situ scenarios, where data remains on simulation nodes. By employing asynchronous framebuffer updates and a novel subtractive lighting model, we achieve acceptable image quality from the first ray generation, and improve quality throughout the render epoch. On simulated in situ rendering tasks, Galaxy outperforms the current best-of-breed scientific ray tracer by over 3x for distributed geometric and particle data, while providing expanded rendering capability for global illumination and complex materials.

关键词： human-centered computing Visualization Computer Graphics Rendering Ray Tracing

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PhoenixMap: Spatio-Temporal Distribution Analysis with Deep Learning Classifications 13

PhoenixMap: Spatio-Temporal Distribution Analysis with Deep ...

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13th IEEE Conference on Visual Analytics Science and Technology (VAST)

作者： Zhao, Junhan Liu, Xiang Guan, Ryan Zhang, Josephine Yang, Baijian Qian, Zhenyu Chen, Yingjie Purdue Univ W Lafayette IN 47907 USA Naperville North High Sch Naperville IL USA Adlai E Stevenson High Sch Lincolnshire IL USA

ISBN: (纸本)9781538668610

In this paper, we introduce PhoenixMap, a visual analytics system to help analysts understand spatiotemporal distribution patterns and anomalies of many objects. It focuses on solving two VA challenges. First, visualizing the spatial distribution of many points under different categories especially when these points partially overlap with each other;Second, employing visual means to classify bird calls using deep learning CNN method. This PhoenixMap system can successfully help us understand the change and patterns of birds regions over many years.

关键词： human-centered computing Visualization Visualization design and evaluation methods

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Real-time 3D Face Reconstruction and Gaze Tracking for Virtual Reality 25

Real-time 3D Face Reconstruction and Gaze Tracking for Virtu...

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

作者： Chen, Shu-Yu Gao, Lin Lai, Yu-Kun Rosin, Paul L. Xia, Shihong Chinese Acad Sci Inst Comp Technol Beijing Key Lab Mobile Comp & Pervas Device Beijing Peoples R China Univ Chinese Acad Sci Beijing Peoples R China Cardiff Univ Sch Comp Sci & Informat Cardiff S Glam Wales

ISBN: (纸本)9781538633656

With the rapid development of virtual reality (VR) technology, VR glasses, a.k.a. Head-Mounted Displays (HMDs) are widely available, allowing immersive 3D content to be viewed. A natural need for truly immersive VR is to allow bidirectional communication: the user should be able to interact with the virtual world using facial expressions and eye gaze, in addition to traditional means of interaction. Typical application scenarios include VR virtual conferencing and virtual roaming, where ideally users are able to see other users' expressions and have eye contact with them in the virtual world. Despite significant achievements in recent years for reconstruction of 3D faces from RGB or RGB-D images, it remains a challenge to reliably capture and reconstruct 3D facial expressions including eye gaze when the user is wearing VR glasses, because the majority of the face is occluded, especially those areas around the eyes which are essential for recognizing facial expressions and eye gaze. In this paper, we introduce a novel real-time system that is able to capture and reconstruct 3D faces wearing HMDs and robustly recover eye gaze. We demonstrate the effectiveness of our system using live capture and more results are shown in the accompanying video.

关键词： computing methodologies Computer graphics Graphics systems and interfaces Virtual reality human-centered computing human computer interaction (HCI) Interaction techniques Gestural input

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Task-Oriented Optimal Sequencing of Visualization Charts

Task-Oriented Optimal Sequencing of Visualization Charts

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IEEE Visualization in Data Science (VDS)

作者： Danqing Shi Yang Shi Xinyue Xu Nan Chen Siwei Fu Hongjin Wu Nan Cao Tongji University

ISBN: (纸本)9781728150482

A chart sequence is used to describe a series of visualization charts generated in the exploratory analysis by data analysts. It provides information details in each chart as well as a logical relationship among charts. While existing research targets suggesting chart sequences that match human's perceptions, little attention has been paid to formulate task-oriented connections between charts in a chart design space. We present a novel chart sequencing method based on reinforcement learning to capture the connections between charts in the context of three major analysis tasks, including correlation analysis, anomaly detection, and cluster analysis. The proposed method formulates a chart sequencing procedure as an optimization problem, which seeks an optimal policy to sequencing charts for the specific analysis task. In our method, a novel reward function is introduced, which takes both the analysis task and the factor of human cognition into consideration. We conducted one case study and two user studies to evaluate the effectiveness of our method under the application scenarios of visualization recommendation, sequencing charts for reasoning analysis results, and making a chart design choice. The study results showed the power of our method.

关键词： human-centered computing Visualization Visual analytics computing methodologies Machine learning Visualization computing Methodologies human-centered computing Visual analytics Analyses, Sequence

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BrightView: Increasing Perceived Brightness of Optical See-Through Head-Mounted Displays Through Unnoticeable Incident Light Reduction 25

BrightView: Increasing Perceived Brightness of Optical See-T...

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

作者： Mori, Shohei Ikeda, Sei Plopski, Alexander Sandor, Christian Keio Univ Tokyo Japan Ritsumeikan Univ Kyoto Japan Nara Inst Sci & Technol Nara Japan

ISBN: (纸本)9781538633656

Optical See-Through Head-Mounted Displays (OST-HMDs) lose the visibility of virtual contents under bright environment illumination due to their see-through nature. We demonstrate how a liquid crystal (LC) filter attached to an OST-HMD can be used to dynamically increase the perceived brightness of virtual content without impacting the perceived brightness of the real scene. We present a prototype OST-HMD that continuously adjusts the opacity of the LC filter to attenuate the environment light without users becoming aware of the change. Consequently, virtual content appears to be brighter. The proposed approach is evaluated in psychophysical experiments in three scenes, with 16, 31, and 31 participants, respectively. The participants were asked to compare the magnitude of brightness changes of both real and virtual objects, before and after dimming the LC filter over a period of 5, 10, and 20 seconds. The results showed that the participants felt increases in the brightness of virtual objects while they were less conscious of reductions of the real scene luminance. These results provide evidence for the effectiveness of our display design. Our design can be applied to a wide range of OST-HMDs to improve the brightness and hence realism of virtual content in augmented reality applications.

关键词： human-centered computing human computer interaction (HCI) Interaction paradigms Mixed/augmented reality Interaction devices Displays and imagers

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