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检索条件"主题词=Human-centered computing"

共 2003 条记录，以下是701-710 订阅

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Distinguishing Visual Fatigue, Mental Workload and Acute Stress in Immersive Virtual Reality with Physiological Data: pre-test results

Distinguishing Visual Fatigue, Mental Workload and Acute Str...

引用

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

作者： Souchet, Alexis D. Xie, Weifei Lourdeaux, Domitile French Natl Ctr Sci Res CNRS Heudiasyc UMR 7253 Compiegne France France Armed Forces Biomed Res Inst IRBA Neurosci Dept Stress Neurophysiol Bretigny Sur Orge France CNRS Heudiasyc UMR 7253 Compiegne France Univ Technol Compiegne CNRS Sorbonne Univ Alliance Heudiasyc UMR 7253 Compiegne France

ISBN: (纸本)9781665484022

Virtual Reality Induced Symptoms and Effects (VRISE) can arise. Experimental paradigms are heterogeneous to assess them, and various factors can induce physiological variations. Therefore, we developed a Stroop task to study and distinguish VRISE. We use eye tracking, ECG, EDA, and VRSQ, NASA-TLX, and STAI-6 questionnaires. Pre-tests have been conducted with 6 subjects exposed to 4 experimental conditions: control, dual task, stressful, and stereoscopy. Subjects report different subjective visual fatigue and mental workload but not stress between conditions. Several physiological features are different between conditions. A VRISE detector can be envisioned based on physiological data and questionnaires as an index.

关键词： human-centered computing human computer interaction (HCI) HCI design and evaluation methods Laboratory experiments

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SPAA: Stealthy Projector-based Adversarial Attacks on Deep Image Classifiers 29

SPAA: Stealthy Projector-based Adversarial Attacks on Deep I...

引用

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

作者： Huang, Bingyao Ling, Haibin Southwest Univ Coll Comp & Informat Sci Chongqing Peoples R China SUNY Stony Brook Dept Comp Sci Stony Brook NY 11794 USA

ISBN: (纸本)9781665496179

Light-based adversarial attacks use spatial augmented reality (SAR) techniques to fool image classifiers by altering the physical light condition with a controllable light source, e.g., a projector. Compared with physical attacks that place hand-crafted adversarial objects, projector-based ones obviate modifying the physical entities, and can be performed transiently and dynamically by altering the projection pattern. However, subtle light perturbations are insufficient to fool image classifiers, due to the complex environment and project-and-capture process. Thus, existing approaches focus on projecting clearly perceptible adversarial patterns, while the more interesting yet challenging goal, stealthy projector-based attack, remains open. In this paper, for the first time, we formulate this problem as an end-to-end differentiable process and propose a Stealthy Projector-based Adversarial Attack (SPAA) solution. In SPAA, we approximate the real Project-and-Capture process using a deep neural network named PCNet, then we include PCNet in the optimization of projector-based attacks such that the generated adversarial projection is physically plausible. Finally, to generate both robust and stealthy adversarial projections, we propose an algorithm that uses minimum perturbation and adversarial confidence thresholds to alternate between the adversarial loss and stealthiness loss optimization. Our experimental evaluations show that SPAA clearly outperforms other methods by achieving higher attack success rates and meanwhile being stealthier, for both targeted and untargeted attacks.

关键词： human-centered computing human computer interaction (HCI) Interaction paradigms Mixed / augmented reality Security and privacy human and societal aspects of security and privacy Privacy protections computing methodologies Artificial intelligence Computer vision Object recognition

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NailRing: An Intelligent Ring for Recognizing Micro-gestures in Mixed Reality 21

NailRing: An Intelligent Ring for Recognizing Micro-gestures...

引用

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

作者： Li, Tianyu Liu, Yue Ma, Shining Hu, Mingwei Liu, Tong Song, Weitao Beijing Inst Technol Sch Opt & Photon Beijing Engn Res Ctr Mixed Real & Adv Display Beijing Peoples R China

ISBN: (数字)9781665453257

ISBN: (纸本)9781665453257

Gesture interaction is currently a main interaction technology in the field of mixed reality. However, long-term and large-scale gesture in mid-air will lead to muscle fatigue and privacy problems, which cannot meet the comfort requirements of continuous interaction and inevitably hinder the development of mixed reality systems. To solve this problem, we propose NailRing, an intelligent ring to recognize fingertip micro-gestures using a micro-close-focus camera on a fingertip bracket. Such fingertip physiological characteristics as the changes in fingertip color distribution and muscle shape changes caused by fingertip pressure have been studied. According to the recognition principle, ten types of micro-gestures have been designed and used for contact interaction and one-hand interaction respectively. The accuracy of gesture recognition (cross-session F-Macro = 98.3%;cross-person F-Macro = 86.4%) in user studies verifies the performances of NailRing under different interaction conditions. Finally, the capability of NailRing in a series of potential application scenarios has also been discussed and analyzed.

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

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Clean the Ocean: An Immersive VR Experience Proposing New Modifications to Go-Go and WiM Techniques

Clean the Ocean: An Immersive VR Experience Proposing New Mo...

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

作者： Lisle, Lee Lu, Feiyu Davari, Shakiba Tahmid, Ibrahim Asadullah Giovannelli, Alexander Llo, Cory Pavanatto, Leonardo Zhang, Lei Schlueter, Luke Bowman, Doug A. Virginia Tech Dept Comp Sci Ctr Human Comp Interact Blacksburg VA 24061 USA

ISBN: (纸本)9781665484022

In this paper we present our solution to the 2022 3DUI Contest challenge. We aim to provide an immersive VR experience to increase player's awareness of trash pollution in the ocean while improving the current interaction techniques in virtual environments. To achieve these objectives, we adapted two classic interaction techniques, Go-Go and World in Miniature (WiM), to provide an engaging minigame in which the user collects the trash in the ocean. To improve the precision and address occlusion issues in the traditional Go-Go technique we propose ReX Go-Go. We also propose an adaptation to WiM, referred to as Rabbit-Out-of-the-Hat to allow an exocentric interaction for easier object retrieval interaction.

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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CardsVR: A Two-Person VR Experience with Passive Haptic Feedback from a Deck of Playing Cards 21

CardsVR: A Two-Person VR Experience with Passive Haptic Feed...

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

作者： Huard, Andrew Chen, Mengyu Sra, Misha Univ Calif Santa Barbara Santa Barbara CA 93106 USA

ISBN: (数字)9781665453257

ISBN: (纸本)9781665453257

Presence in virtual reality (VR) is meaningful for remotely connecting with others and facilitating social interactions despite great distance while providing a sense of "being there." This work presents CardsVR, a two-person VR experience that allows remote participants to play a game of cards together. An entire deck of tracked cards are used to recreate the sense of playing cards in-person. Prior work in VR commonly provides passive haptic feedback either through a single object or through static objects in the environment. CardsVR is novel in providing passive haptic feedback through multiple cards that are individually tracked and represented in the virtual environment. Participants interact with the physical cards by picking them up, holding them, playing them, or moving them on the physical table. Our participant study (N=23) shows that passive haptic feedback provides significant improvement in three standard measures of presence: Possibility to Act, Realism, and Haptics.

关键词： human-centered computing Mixed / augmented reality

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Omnidirectional Neural Radiance Field for Immersive Experience

Omnidirectional Neural Radiance Field for Immersive Experien...

引用

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

作者： Li, Qiaoge Ueda, Itsuki Xie, Chun Shishido, Hidehiko Kitahara, Itaru Univ Tsukuba Tsukuba Ibaraki Japan

ISBN: (纸本)9781665484022

This paper proposes a method using only RGB information from multiple captured panoramas to provide an immersive observing experience for real scenes. We generated an omnidirectional neural radiance field by adopting the Fibonacci sphere model for sampling rays and several optimized positional encoding approaches. We tested our method on synthetic and real scenes and achieved satisfying empirical performance. Our result makes the immersive continuous free-viewpoint experience possible.

关键词： human-centered computing Virtual Reality Immersive Experience Free-viewpoint Videos

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Designing Sound Synthesis Interfaces for Head-mounted Augmented Reality

Designing Sound Synthesis Interfaces for Head-mounted Augmen...

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

作者： Wang, Yichen Martin, Charles Australian Natl Univ Sch Comp Canberra ACT Australia

ISBN: (纸本)9781665484022

We report on designing a sound synthesis interface for a head-mounted augmented reality environment. The increased accessibility of augmented reality (AR) devices has incentivised the exploration of sound applications for music performance in computer music and other relevant communities. However, interaction affordances vary based on the specific AR device and thus implies different design considerations. In this poster, we present different interface prototypes for a frequency modulation synthesis system in the Microsoft HoloLens 2 and report our insights during the process of their developments.

关键词： human-centered computing human computer interaction (HCI) Interaction paradigms Mixed/augmented reality Applied computing Arts and humanities Sound and music computing

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PseudoJumpOn: Jumping onto Steps in Virtual Reality 29

PseudoJumpOn: Jumping onto Steps in Virtual Reality

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

作者： Ogawa, Kumpei Fujita, Kazuyuki Takashima, Kazuki Kitamura, Yoshifumi Tohoku Univ Sendai Miyagi Japan

ISBN: (纸本)9781665496179

Jumping onto steps is a promising action for creating an instant height movement in VR, but installing physical steps is impractical. We propose PseudoJumpOn, a novel locomotion technique using a common VR setup that allows the user to experience virtual step-up jumping motion by applying two types of viewpoint-manipulation methods to a physical jump on a flat floor. The core idea is to replicate the physical characteristics of ascending jumps, and thus we designed two viewpoint-manipulation methods: gain manipulation, which differentiates the ascent and descent height, and peak shifting, which delays the peak timing. We conducted a user study asking participants (N = 20) to experience two-legged step-up jumps onto 0.2-0.8-m heights in VR as the two methods were applied in combination (gain manipulation: five conditions where the ascending gain was 1.0-5.0;peak shifting: four conditions where the peak timing in VR was delayed by 0-1.0 ratios of the original timing). The results showed that the participants in most conditions felt positively in terms of reality and naturalness of actually jumping onto steps, even though knowing no physical steps existed. In addition, subsequent analyses also derived practical guidelines for determining the appropriate gains and the potential use of peak shifting to achieve a natural step-up jumping experience.

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

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Power Overwhelming: Quantifying the Energy Cost of Visualisation 9

Power Overwhelming: Quantifying the Energy Cost of Visualisa...

引用

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

作者： Mueller, Christoph Heinemann, Moritz Weiskopf, Daniel Ertl, Thomas Univ Stuttgart Visualisierungsinst Stuttgart Germany

ISBN: (数字)9798350396294

ISBN: (纸本)9798350396294

GPUs are the power-hungry tool of many visualisation researchers. However, their energy consumption has mostly been investigated outside the visualisation community, albeit our algorithms can generate more complex workloads than compute kernels. Additionally, a raising number of web-based visualisations potentially makes consumers other than the GPU more relevant. We present measurement setups for quantifying the energy cost of visualisation, ranging from software sensors over external power meters and micro controllerbased setups to using oscilloscopes. These setups cover energy consumption of GPUs, CPUs and other components of a computing system. Using raycasting of spherical glyphs, volume rendering and D3 visualisations as examples, we show that there are viable options for evaluating most kinds of visualisations. We conclude by stating the challenges to a broader application of these techniques and by making recommendations on how to overcome these.

关键词： Hardware Power and energy Impact on the environment Hardware-Hardware test Board- and system-level test human-centered computing Visualization Visualization systems and tools

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Real-time Gaze Tracking with Head-eye Coordination for Head-mounted Displays 21

Real-time Gaze Tracking with Head-eye Coordination for Head-...

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

作者： Chen, Lingling Li, Yingxi Bai, Xiaowei Wang, Xiaodong Hu, Yongqiang Song, Mingwu Xie, Liang Yan, Ye Yin, Erwei Hebei Univ Technol Sch Artificial Intelligence & Data Sci Tianjin Peoples R China Acad Mil Sci Def Innovat Inst Beijing Peoples R China Tianjin Artificial Intelligence Innovat Ctr Tianjin Peoples R China

ISBN: (数字)9781665453257

ISBN: (纸本)9781665453257

High-accuracy, low-latency gaze tracking is becoming one of the indispensable features in augmented reality (AR) head-mounted devices (HMDs). Researchers have proposed different approaches to predict gaze positions from eye images. However, since only the eye modality is focused, these appearance-based algorithms are still struggle to trade off the accuracy and running speed in HMDs. In this paper, we propose a lightweight multi-modal network (HE-Tracker) to regress gaze positions. By fusing head-movement features with eye features, HE-Tracker achieves comparable accuracy (3.655. in all subjects) and 27x speedup (48 fps in the specialized AR HMD) compared to the state-of-the-art gaze tracking algorithm. We further demonstrate that when applying our head-eye coordination strategy to other baseline models, all these models achieve at least 6.36% performance improvement without a pronounced effect on running speed. Moreover, we construct HE-Gaze, the first multi-modal dataset with eye images and head-movement data for near-eye gaze tracking. This dataset is currently made of 757,360 frames and 15 persons, providing an opportunity to foster research in multi-modal gaze tracking approaches. Our dataset is available at DOWNLOAD LINK1.

关键词： human-centered computing human computer interaction (HCI) Interaction paradigms Augmented reality computing methodologies Artificial intelligence Computer vision Computer vision problems

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