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检索条件"主题词=Human-centered computing"

共 2020 条记录，以下是841-850 订阅

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Using External Video to Attack Behavior-Based Security Mechanisms in Virtual Reality (VR)

Using External Video to Attack Behavior-Based Security Mecha...

引用

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

作者： Miller, Robert Banerjee, Natasha Kholgade Banerjee, Sean Clarkson Univ Potsdam NY 13699 USA

ISBN: (纸本)9781665484022

As virtual reality (VR) systems become prevalent in domains such as healthcare and education, sensitive data must be protected from attacks. Password-based techniques are circumvented once an attacker gains access to the user's credentials. Behavior-based approaches are susceptible to attacks from malicious users who mimic the actions of a genuine user or gain access to the 3D trajectories. We investigate a novel attack where a malicious user obtains a 2D video of genuine user interacting in VR. We demonstrate that an attacker can extract 2D motion trajectories from the video and match them to 3D enrollment trajectories to defeat behavior-based VR security.

关键词： human-centered computing human computer interaction (HCI) Interaction paradigms Virtual reality Security and privacy Security services Authentication Biometrics

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If I Share with you my Perspective, Would you Share your Data with me?

If I Share with you my Perspective, Would you Share your Dat...

引用

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

作者： Song, Tianyu Eck, Ulrich Navab, Nassir Tech Univ Munich Munich Germany Johns Hopkins Univ Baltimore MD USA

ISBN: (纸本)9781665484022

Real-time 3D reconstruction using multiple RGBD cameras and their online transmission facilitates the adoption of mixed reality telepresence. However, such a system can only cover a limited volume, and increasing the number of RGBD cameras is unfeasible due to setup complexity and space constraints. To address this issue, we present the concept of Dynamic 3D View Sharing, which complements the views of a 3D reconstruction system by the dynamic view of the user's HMD. Here, we present a markerless calibration method integrating these two seamlessly into the mixed reality telepresence systems without disrupting the current workflow.

关键词： human-centered computing Mixed/augmented reality computing methodologies Artificial intelligence Computer vision Reconstruction

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VISUAL AUDITOR: Interactive Visualization for Detection and Summarization of Model Biases

VISUAL AUDITOR: Interactive Visualization for Detection and ...

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IEEE Visualization Conference (VIS)

作者： Munechika, David Wang, Zijie J. Reidy, Jack Rubin, Josh Gade, Krishna Kenthapadi, Krishnaram Chau, Duen Horng Georgia Tech Atlanta GA 30332 USA Fiddler AI Palo Alto CA USA

ISBN: (数字)9781665488129

ISBN: (纸本)9781665488129

As machine learning (ML) systems become increasingly widespread, it is necessary to audit these systems for biases prior to their deployment. Recent research has developed algorithms for effectively identifying intersectional bias in the form of interpretable, underperforming subsets (or slices) of the data. However, these solutions and their insights are limited without a tool for visually understanding and interacting with the results of these algorithms. We propose VISUAL AUDITOR, an interactive visualization tool for auditing and summarizing model biases. VISUAL AUDITOR assists model validation by providing an interpretable overview of intersectional bias (bias that is present when examining populations defined by multiple features), details about relationships between problematic data slices, and a comparison between underperforming and overperforming data slices in a model. Our open-source tool runs directly in both computational notebooks and web browsers, making model auditing accessible and easily integrated into current ML development workflows. An observational user study in collaboration with domain experts at Fiddler AI highlights that our tool can help ML practitioners identify and understand model biases.

关键词： human-centered computing Visualization

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AIR-range: Arranging optical systems to present mid-AIR images with continuous luminance on and above a tabletop

AIR-range: Arranging optical systems to present mid-AIR imag...

引用

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

作者： Kikuchi, Tomoyo Yahagi, Yuchi Fukushima, Shogo Sakaguchi, Saki Naemura, Takeshi Univ Tokyo Tokyo Japan Tokyo Metropolitan Univ Hachioji Tokyo Japan

ISBN: (纸本)9781665484022

We propose "AIR-range"- a system that seamlessly connects mid-air images from the surface of a table to mid-air space. This system can display tall mid-air images in the three-dimensional (3D) space beyond the screen. AIR-range is implemented using a symmetrical mirror structure that displays a large image by integrating multiple imaging paths. The mirror arrangement in previous research had a problem in that the luminance was discontinuous. In this study, we theorize the relationship between the parameters of optical elements and the appearance of mid-air images and optimize an optical system to minimize the difference in luminance between image paths.

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

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The Effects of Avatar and Environment Design on Embodiment, Presence, Activation, and Task Load in a Virtual Reality Exercise Application 21

The Effects of Avatar and Environment Design on Embodiment, ...

引用

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

作者： Bartl, Andrea Merz, Christian Roth, Daniel Latoschik, Marc Erich Univ Wurzburg HCI Grp Wurzburg Germany FAU Erlangen Nurnberg HEX Lab Erlangen Germany

ISBN: (数字)9781665453257

ISBN: (纸本)9781665453257

The development of embodied Virtual Reality (VR) systems involves multiple central design choices. These design choices affect the user perception and therefore require thorough consideration. This article reports on two user studies investigating the influence of common design choices on relevant intermediate factors (sense of embodiment, presence, motivation, activation, and task load) in a VR application for physical exercises. The first study manipulated the avatar fidelity (abstract, partial body vs. anthropomorphic, full-body) and the environment (with vs. without mirror). The second study manipulated the avatar type (healthy vs. injured) and the environment type (beach vs. hospital) and, hence, the avatar-environment congruence. The full-body avatar significantly increased the sense of embodiment and decreased mental demand. Interestingly, the mirror did not influence the dependent variables. The injured avatar significantly increased the temporal demand. The beach environment significantly reduced the tense activation. On the beach, participants felt more present in the incongruent condition embodying the injured avatar.

关键词： human-centered computing Empirical studies in HCI human-centered computing User studies human-centered computing Virtual reality

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Exploring Efficiency of Vision Transformers for Self-Supervised Monocular Depth Estimation 21

Exploring Efficiency of Vision Transformers for Self-Supervi...

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

作者： Karpov, Aleksei Makarov, Ilya AIRI Moscow Russia HSE Univ Moscow Russia Docet TI Tel Aviv Israel

ISBN: (数字)9781665453257

ISBN: (纸本)9781665453257

Depth estimation is a crucial task for the creation of depth maps, one of the most important components for augmented reality (AR) and other applications. However, the most widely used hardware for AR and smartphones has only sparse depth sensors with different ground truth depth acquisition methods. Thus, depth estimation models that are robust for downstream AR tasks performance can only be trained reliably using self-supervised learning based on camera information. Previous works in the field mostly focus on self-supervised models with pure convolutional architectures, without taking global spatial context into account. In this paper, we utilize vision transformer architectures for self-supervised monocular depth estimation and propose VTDepth, a vision transformer-based model, which provides a solution to the problem of the global spatial context. We compare various combinations of convolutional and transformer architectures for self-supervised depth estimation and show that the best combination of models is an encoder with a transformer basis and convolutional decoder. Our experiments demonstrate the efficiency of VTDepth for self-supervised depth estimation. Our set of models achieves state-of-the-art performance for self-supervised learning on NYUv2 and KITTI datasets. Our code is available at https://***/ahbpp/VTDepth.

关键词： human-centered computing human computer interaction (HCI) Interaction paradigms Mixed / augmented reality Artificial intelligence Computer vision Localization, spatial registration and tracking 3D reconstruction

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An Interdisciplinary Perspective on Evaluation and Experimental Design for Visual Text Analytics: Position Paper 9

An Interdisciplinary Perspective on Evaluation and Experimen...

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9th IEEE Evaluation and Beyond - Methodological Approaches for Visualization (BELIV)

作者： Kucher, Kostiantyn Sultanum, Nicole Daza, Angel Simaki, Vasiliki Skeppstedt, Maria Plank, Barbara Fekete, Jean-Daniel Mahyar, Narges Linkoping Univ Linkoping Sweden Linnaeus Univ Vaxjo Sweden Univ Toronto Toronto ON Canada Vrije Univ Amsterdam Amsterdam Netherlands Lund Univ Lund Sweden Uppsala Univ Dept ALM CDHU Uppsala Sweden Ludwig Maximilians Univ Munchen IT Univ Copenhagen Munich Germany Univ Paris Saclay INRIA Paris France UMass Amherst Amherst MA USA

ISBN: (数字)9798350396294

ISBN: (纸本)9798350396294

Appropriate evaluation and experimental design are fundamental for empirical sciences, particularly in data-driven fields. Due to the successes in computational modeling of languages, for instance, research outcomes are having an increasingly immediate impact on end users. As the gap in adoption by end users decreases, the need increases to ensure that tools and models developed by the research communities and practitioners are reliable, trustworthy, and supportive of the users in their goals. In this position paper, we focus on the issues of evaluating visual text analytics approaches. We take an interdisciplinary perspective from the visualization and natural language processing communities, as we argue that the design and validation of visual text analytics include concerns beyond computational or visual/interactive methods on their own. We identify four key groups of challenges for evaluating visual text analytics approaches (data ambiguity, experimental design, user trust, and "big picture" concerns) and provide suggestions for research opportunities from an interdisciplinary perspective.

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

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VRDoc: Gaze-based Interactions for VR Reading Experience 21

VRDoc: Gaze-based Interactions for VR Reading Experience

引用

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

作者： Lee, Geonsun Healey, Jennifer Manocha, Dinesh Univ Maryland College Pk MD 20742 USA Adobe Res San Jose CA USA

ISBN: (数字)9781665453257

ISBN: (纸本)9781665453257

Virtual reality (VR) offers the promise of an infinite office and remote collaboration, however, existing interactions in VR do not strongly support one of the most essential tasks for most knowledge workers, reading. This paper presents VRDoc, a set of gaze-based interaction methods designed to improve the reading experience in VR. We introduce three key components: Gaze Select-and-Snap for document selection, Gaze MagGlass for enhanced text legibility, and Gaze Scroll for ease of document traversal. We implemented each of these tools using a commodity VR headset with eye-tracking. In a series of user studies with 13 participants, we show that VRDoc makes VR reading both more efficient (p < 0.01) and less demanding (p < 0.01), and when given a choice, users preferred to use our tools over the current VR reading methods.

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

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Exploring Pseudo-Weight in Augmented Reality Extended Displays 29

Exploring Pseudo-Weight in Augmented Reality Extended Displa...

引用

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

作者： Mori, Shohei Kataoka, Yuta Hashiguchi, Satoshi Graz Univ Technol Graz Austria Ritsumeikan Univ Kyoto Japan Ryukoku Univ Kyoto Japan

ISBN: (纸本)9781665496179

Augmented reality (AR) allows us to wear virtual displays that are registered to our bodies and devices. Such virtually extendable displays, or AR extended displays (AREDs), provide personal display space and are free from physical restrictions. Existing work has explored the new design space to improve user experience and efficiency. Contrary to this direction, we focus on the weight that the user perceives from AREDs, even though they are virtual and have no physical weight. Our user study results show evidence that AREDs can be a source of pseudo-weight, in addition to that of a handheld physical display device. We also systematically evaluate the perceived weight changes depending on the layout and delay in the visualization system. These findings are similar to those in existing pseudo-haptics research. However, we found such behavior in pseudo-weight for a real device and virtual visual stimuli in the air, which differentiates our research from previous work.

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

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Anatomy Studio II A Cross-Reality Application for Teaching Anatomy

Anatomy Studio II A Cross-Reality Application for Teaching A...

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

作者： Jorge, Joaquim Belchior, Pedro Gomes, Abel Sousa, Mauricio Pereira, Joao Uhl, Jean-Francois Univ Lisbon Lisbon Portugal Univ Beira Interior Covilha Portugal Univ Toronto Toronto ON Canada Univ Paris Paris France

ISBN: (纸本)9781665484022

Virtual Reality has become an important educational tool, due to the pandemic and increasing globalization of education. In this paper, we present a framework for teaching Virtual Anatomy at the university level. Because of the isolation and quarantine requirements and the increased international collaboration, virtual classes have become a staple of today's curricula. Our work builds on the Visible human Projects for Virtual Dissection material and provides a medium for groups of students to do collaborative anatomical dissections in real-time using sketching and 3D visualizations and audio coupled with interactive 2D tablets for precise drawing. We describe the system architecture, compare requirements with those of a previous development [1] and discuss the preliminary results. Discussions with Anatomists show that this is an effective tool. We introduce avenues for further research and discuss collaboration challenges posed by this context.

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

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