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检索条件"主题词=Human-centered computing"

共 2020 条记录，以下是851-860 订阅

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Effects of Clutching Mechanism on Remote Object Manipulation Tasks

Effects of Clutching Mechanism on Remote Object Manipulation...

引用

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

作者： Gao, Zihan Wang, Huiqiang Ge, Anqi Lv, Hongwu Feng, Guangsheng Harbin Engn Univ Harbin Peoples R China Peng Cheng Lab Shenzhen Peoples R China Harbin Med Univ Harbin Peoples R China

ISBN: (纸本)9781665484022

Remote object manipulation in practice is often an iterative process that needs clutching. However, while many interaction techniques have been designed for manipulating remote objects, clutching mechanism is often an important but overlooked aspect in manipulation tasks. In this paper, we evaluate the effects of clutching mechanism on remote object manipulation tasks, which compares two clutching mechanisms under various tasks settings. The results suggested that an efficient clutching mechanism can effectively improve the usability in remote object manipulation tasks.

关键词： human-centered computing Interaction design Empirical studies in interaction design human-centered computing human computer interaction (HCI) Interaction techniques Pointing

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A Location-Triggered Augmented Reality Walking Tour Using Snap Spectacles 2021

A Location-Triggered Augmented Reality Walking Tour Using Sn...

引用

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

作者： Sanchawala, AadilMehdi Dimofte, Mara Feiner, Steven K. Columbia Univ Dept Comp Sci New York NY 10027 USA

ISBN: (纸本)9781665484022

We present an on-site 3D-animated audiovisual tour guide augmented reality application developed for Snap Spectacles 2021. The primary goal of this project is to explore how to use this experimental product to create an augmented reality tour guide. In addition, we present the design considerations for the user interface and the underlying system architecture. We illustrate the workflow of the tour application and discuss our experience working with Spectacles 2021 and its experimental API. We also present our design choices and directions for future work.

关键词： human-centered computing human Computer Interaction (HCI) Interaction paradigms Mixed / augmented reality computing methodologies Computer graphics Graphics systems and interfaces Mixed / augmented reality

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How bright should a virtual object be to appear opaque in optical see-through AR? 21

How bright should a virtual object be to appear opaque in op...

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21st IEEE International Symposium on Mixed and Augmented Reality (ISMAR)

作者： Liu, Jingyu Jindal, Akshay Mantel, Claire Forchhammer, Soren Mantiuk, Rafal K. Tech Univ Denmark Dept Photon Engn Lyngby Denmark Univ Cambridge Dept Comp Sci & Technol Cambridge England

ISBN: (数字)9781665453257

ISBN: (纸本)9781665453257

Reproduction of occlusions and opaque surfaces are the major challenges of additive optical see-through (OST) displays. This is because the user of an OST display sees a linear mixture of display and environment light, which creates an impression of transparency unless the displayed color is sufficiently bright. The primary goal of this work is to determine how bright a displayed surface needs to be in relation to environment light to be perceived as opaque. We test multiple factors that could affect the perception of opacity: background luminance, contrast, spatial frequency, and accommodation depth in foveal vision. The subjective results, collected on a high-dynamic-range multi-focal stereo display, indicate that a virtual object needs to be, on average, 60 times brighter than the background environment light to be perceived as opaque. A higher contrast of the texture of the virtual object and a background that is out of focus can reduce the required luminance ratio. We demonstrate that a model of visual perception based on Weber's law and accounting for contrast masking and defocus blur can predict the experimental data with an averaged prediction error of 8.29%. Existing perceptual image difference metrics (PSNR, FovVideoVDP and HDR-VDP-3) can also predict the effect of major factors, but with lower accuracy (e.g. prediction error of 34% for PSNR with PU21 encoding).

关键词： human-centered computing HCI theory, concepts and models

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AR HMD for Remote Instruction in Healthcare

AR HMD for Remote Instruction in Healthcare

引用

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

作者： Mentis, Helena M. Avellino, Ignacio Seo, Jwawon Univ Maryland Baltimore Cty Baltimore MD 21228 USA Sorbonne Univ ISIR CNRS Paris France

ISBN: (纸本)9781665484022

In the following position paper we introduce the use of AR HMD for remote instruction in healthcare and present the challenges our team has faced in achieving this application in two contexts: surgical telementoring and paramedic teleconsulting. After the presentation of how these challenges come to be and indications on how to address them, we argue that those who wish to pursue this area of research must be grounded in best practices from the field of CSCW integrated with technical innovations in AR interaction development. This is a truly interdisciplinary research and development area that has many challenging topics to tackle through collaborative efforts.

关键词： human-centered computing Visualization

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FusEDAR: Adaptive Environment Lighting Reconstruction for Visually Coherent Mobile AR Rendering

FusEDAR: Adaptive Environment Lighting Reconstruction for Vi...

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

作者： Zhao, Yiqin Guo, Tian Worcester Polytech Inst Worcester MA 01609 USA

ISBN: (纸本)9781665484022

Obtaining accurate omnidirectional environment lighting for high quality rendering in mobile augmented reality is challenging due to the practical limitation of mobile devices and the inherent spatial variance of lighting. In this paper, we present a novel adaptive environment lighting reconstruction method called FUSEDAR, which is designed from the outset to consider mobile characteristics, e.g., by exploiting mobile user natural behaviors of pointing the camera sensors perpendicular to the observation-rendering direction. Our initial evaluation shows that FUSEDAR achieves better rendering effects compared to using a recent deep learning-based AR lighting estimation system [8] and environment lighting captured by 360 degrees cameras.

关键词： computing methodologies Computer graphics Graphics systems and interfaces Mixed / augmented reality human-centered computing human computer interaction (HCI) Interaction paradigms Mixed / augmented reality human-centered computing Ubiquitous and mobile computing Empirical studies in ubiquitous and mobile computing

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Cognality VR: Exploring a Mobile VR App with Multiple Stakeholders to Reduce Meltdowns in Autistic Children

Cognality VR: Exploring a Mobile VR App with Multiple Stakeh...

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CHI Conference on human Factors in computing Systems (CHI)

作者： Boyd, LouAnne E. Garner, Espen Kim, Ian Valencia, Gianna Chapman Univ Orange CA 92866 USA Stanford Univ Stanford CA 94305 USA Dartmouth Coll Hanover NH 03755 USA Georgetown Univ Washington DC 20057 USA

ISBN: (纸本)9781450391566

Many autistic children can have difficulty communicating, understanding others, and interacting with new and unfamiliar environments. At times they may suffer from a meltdown. The major contributing factor to meltdowns is sensory overwhelm. Technological solutions have shown promise in improving the quality of life for autistic children-however little exists to manage meltdowns. In this work with stakeholders, we design and deploy a low cost, mobile VR application to provide relief during sensory discomfort. Through the analysis of surveys from 88 stakeholders from a variety of groups (i.e., autistic adults, children with autism, parents of autistic individuals, and medical practitioners), we identified three key features regarding ways to manage meltdowns: escape, distract, and wait it out. These insights were implementation in a system, then was then remotely deployed with 6 families. Findings and future steps are discussed.

关键词： human-centered computing usability ubiquitous and mobile computing participatory design autism meltdowns virtual reality mobile

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VegaFusion: Automatic Server-Side Scaling for Interactive Vega Visualizations

VegaFusion: Automatic Server-Side Scaling for Interactive Ve...

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IEEE Visualization Conference (VIS)

作者： Kruchten, Nicolas Mease, Jon Moritz, Dominik Ecole Technol Super Montreal PQ Canada VegaFus Technol LLC Sheridan WY USA Carnegie Mellon Univ Pittsburgh PA 15213 USA

ISBN: (数字)9781665488129

ISBN: (纸本)9781665488129

The Vega grammar has been broadly adopted by a growing ecosystem of browser-based visualization tools. However, the reference Vega renderer does not scale well to large datasets (e.g., millions of rows or hundreds of megabytes) because it requires the entire dataset to be loaded into browser memory. We introduce VegaFusion, which brings automatic server-side scaling to the Vega ecosystem. VegaFusion accepts generic Vega specifications and partitions the required computation between the client and an out-of-browser, natively-compiled server-side process. Large datasets can be processed server-side to avoid loading them into the browser and to take advantage of multi-threading, more powerful server hardware and caching. We demonstrate how VegaFusion can be integrated into the existing Vega ecosystem, and show that VegaFusion greatly outperforms the reference implementation. We demonstrate these benefits with VegaFusion running on the same machine as the client as well as on a remote machine.

关键词： human-centered computing Visualization Visualization systems and tools Visualization toolkits human-centered computing Visualization Visualization application domains Information visualization

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Who will Trust my Digital Twin? Maybe a Clerk in a Brick and Mortar Fashion Shop

Who will Trust my Digital Twin? Maybe a Clerk in a Brick and...

引用

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

作者： Stacchio, Lorenzo Perlino, Michele Vagnoni, Ulderico Sasso, Federica Scorolli, Claudia Marfia, Gustavo Univ Bologna Dept Life Qual Studies Bologna Italy Univ Bologna Dept Comp Sci & Engn Bologna Italy Univ Bologna Dept Philosophy & Commun Studies Bologna Italy Univ Bologna Dept Arts Bologna Italy

ISBN: (纸本)9781665484022

Digital Twin (DT) models mirror the life of physical entities and are adopted to optimize several industrial processes. Although well-established in the industrial fields, one of the most exciting examples of where DTs may be employed is in the MetaVerse, with human Digital Twins (HDTs). We present a preliminary study that examines the efficacy of HDT-human interactions in the context of a fashion shop. Based on the results obtained involving thirty-two participants in our experiments, we begin a discussion related to the pros and cons of this approach on x-commerce.

关键词： human-centered computing MetaVerse human Digital Twin X-Commerce

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Short-term Path Prediction for Spontaneous human Locomotion in Arbitrary Virtual Spaces 21

Short-term Path Prediction for Spontaneous Human Locomotion ...

引用

21st IEEE International Symposium on Mixed and Augmented Reality (ISMAR)

作者： Hirt, Christian Ketzel, Marco Graf, Philip Holz, Christian Kunz, Andreas Swiss Fed Inst Technol Innovat Ctr Virtual Real Zurich Switzerland Swiss Fed Inst Technol Dept Comp Sci Zurich Switzerland

ISBN: (数字)9781665453653

ISBN: (纸本)9781665453653

Redirected Walking (RDW) contracts a large virtual environment to fit small physical tracking spaces to enable natural locomotion through the whole environment. Among RDW, predictive RDW is one of the core concepts where algorithms rely on predicting users' future paths to adjust the induced redirection that manipulates users' perception, deviating their physical paths from the intended virtual paths. General human path predictions either assume drastic simplifications or build on complex human locomotion models, which are unsuitable for real-time planning and thus unusable for predictive RDW. Further, integrating existing predictive RDW algorithms with virtual and unconstrained open spaces exponentially increases their computational complexity, which risks collisions with physical obstacles such as walls or other users when these algorithms fail. To avoid computational complexity, virtual environments have been simplified to constrain users by reducing or even inhibiting deviation from predefined paths, particularly limiting the exploratory component of virtual experiences. In this paper, we derive and evaluate four short-term path prediction models that are computationally inexpensive and provide full support for virtual open spaces. We also include a simplistic approach that resembles the virtually constrained path prediction currently popular in predictive RDW as a baseline. We propose prediction models that consist of two shapes: a drop shape represented by the lemniscate of Bernoulli and a sector shape. Within these shapes, we enable linear and clothoidic locomotion, represented by two different types of trajectories. In our evaluation, we test our models in seven different virtual environments on paths amounting to 35 km total length, which we acquired from 54 study participants.

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

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Body Warping Versus Change Blindness Remapping: A Comparison of Two Approaches to Repurposing Haptic Proxies for Virtual Reality 29

Body Warping Versus Change Blindness Remapping: A Comparison...

引用

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

作者： Patras, Cristian Cibulskis, Mantas Nilsson, Niels Christian Aalborg Univ Aalborg Denmark

ISBN: (纸本)9781665496179

When using tangible props as proxies for virtual objects, it is important that these haptic proxies are similar to and co-located with their virtual counterparts. This makes it challenging to scale virtual scenarios because more proxies are needed as scenarios grow more complex. Haptic retargeting, or virtual remapping, makes it possible to repurpose the same physical prop as a proxy for multiple virtual objects. This paper details a user study comparing two techniques for repurposing haptic proxies;namely haptic retargeting based on body warping and change blindness remapping. Participants performed a simple button-pressing task, and 24 virtual buttons were mapped onto four haptic proxies with varying degrees of misalignment. Body warping and change blindness remapping were used to realign the real and virtual buttons, and the results indicate that users failed to reliably detect realignment of up to 7.9 cm for body warping and up to 9.7 cm for change blindness remapping. Moreover, change blindness remapping yielded significantly higher self-reported agency, and marginally higher ownership. Taken together these results suggest that this less explored technique has potential when it comes to repurposing haptic proxies for virtual reality.

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

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