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检索条件"主题词=Human-centered computing"

共 2020 条记录，以下是1061-1070 订阅

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Maximising the Transferability of Interaction Techniques for Immersive Technologies 20

Maximising the Transferability of Interaction Techniques for...

引用

20th IEEE International Symposium on Mixed and Augmented Reality (ISMAR)

作者： Spittle, Becky Birmingham City Univ Sch Comp & Digital Technol DMT Lab Birmingham W Midlands England

ISBN: (纸本)9781665412988

A key factor encompassing immersive technologies is interaction, and the input methods employed to manipulate an interface. Nevertheless, barriers surrounding interaction and usability continue to hinder the development and potential of immersive technologies, with researchers having difficulties taking applications from laboratory environments to real use cases [5]. Therefore, the proposed PhD research aims to identify how natural input methods are best implemented in regards to commonplace tasks in immersive environments, and uncover how user approaches adapt depending on changes in environmental factors, the context of interaction and the hardware employed.

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

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Depth Inpainting via Vision Transformer 20

Depth Inpainting via Vision Transformer

引用

20th IEEE International Symposium on Mixed and Augmented Reality (ISMAR)

作者： Makarov, Ilya Borisenko, Gleb HSE Univ Moscow Russia Artificial Intelligence Res Inst Moscow Russia

ISBN: (纸本)9781665412988

Depth inpainting is a crucial task for working with augmented reality. In previous works missing depth values are completed by convolutional encoder-decoder networks, which is a kind of bottleneck. But nowadays vision transformers showed very good quality in various tasks of computer vision and some of them became state of the art. In this study, we presented a supervised method for depth inpainting by RGB images and sparse depth maps via vision transformers. The proposed model was trained and evaluated on the NYUv2 dataset. Experiments showed that a vision transformer with a restrictive convolutional tokenization model can improve the quality of the inpainted depth map.

关键词： human-centered computing human computer interaction (HCI) Interaction paradigms-Mixed / augmented reality computing methodologies Artificial intelligence Computer vision Reconstruction, 3D imaging, Computational photograph

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Matching 2D Image Patches and 3D Point Cloud Volumes by Learning Local Cross-domain Feature Descriptors

Matching 2D Image Patches and 3D Point Cloud Volumes by Lear...

引用

28th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Liu, Weiquan Lai, Baiqi Wang, Cheng Bian, Xuesheng Wen, Chenglu Cheng, Ming Zang, Yu Xia, Yan Li, Jonathan Xiamen Univ Xiamen Peoples R China Tech Univ Munich Munich Germany Univ Waterloo Waterloo ON Canada

ISBN: (纸本)9781665440578

Establishing the relationship of 2D images and 3D point clouds is a solution to establish the spatial relationship between 2D and 3D space, i.e. AR virtual-real registration. In this paper, we propose a network, 2D3D-GAN-Net, to learn the local invariant cross-domain feature descriptors of 2D image patches and 3D point cloud volumes. Then, the learned local invariant cross-domain feature descriptors are used for matching 2D images and 3D point clouds. The Generative Adversarial Networks (GAN) is embedded into the 2D3D-GAN-Net, which is used to distinguish the source of the learned feature descriptors, facilitating the extraction of invariant local cross-domain feature descriptors. Experiments show that the local cross-domain feature descriptors learned by 2D3D-GAN-Net are robust, and can be used for cross-dimensional retrieval on the 2D image patches and 3D point cloud volumes dataset. In addition, the learned 3D feature descriptors are used to register the point cloud for demonstrating the robustness of learned local cross-domain feature descriptors.

关键词： human-centered computing human Computer Interaction Interaction Paradigms Augmented reality

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Stable Hand Pose Estimation under Tremor via Graph Neural Network 28

Stable Hand Pose Estimation under Tremor via Graph Neural Ne...

引用

28th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Leng, Zhiying Chen, Jiaying Shum, Hubert P. H. Li, Frederick W. B. Liang, Xiaohui Beihang Univ State Key Lab Virtual Real Technol & Syst Beijing Peoples R China Univ Durham Dept Comp Sci Durham England

ISBN: (纸本)9781665418386

Hand pose estimation, which predicts the spatial location of hand joints, is a fundamental task in VR/AR applications. Although existing methods can recover hand pose competently, the tremor issue occurring in hand motion has not been completely solved. Tremor is an involuntary motion accompanied by a desired gesture or hand motion, leading to hand pose that deviates from user's intentions. Considering the characteristic of tremor motion, we present a novel Graph Neural Network for stable 3D hand pose estimation. The input is depth images. The constraint adjacency matrix is devised in Graph Neural Network for dynamically adjusting the topology of a hand graph during message passing and aggregation. Firstly, since there are rich potential constraints among hand joints, we utilize the constraint adjacency matrix to mine the suitable topology, modeling spatial-temporal constraints of joints and outputting the precise tremor hand pose as the pre-estimation result. Then, for obtaining a stable hand pose, we provide a tremor compensation module based on the constraint adjacency matrix, which exploits the constraint between control points and tremor hand pose. Concretely, the control points represented the voluntary motion are employed as constraints to edit the tremor hand pose. Our extensive quantitative and qualitative experiments show that the proposed method has achieved decent performance for 3D tremor hand pose estimation.

关键词： computing methodologies Artificial intelligence Computer vision Computer vision problems human-centered computing human computer interaction Interaction techniques Gestural input

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The Effect of Pitch in Auditory Error Feedback for Fitts' Tasks in Virtual Reality Training Systems 28

The Effect of Pitch in Auditory Error Feedback for Fitts' Ta...

引用

28th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Batmaz, Anil Ufuk Stuerzlinger, Wolfgang Simon Fraser Univ Burnaby BC Canada

ISBN: (纸本)9781665418386

Fitts' law and the associated throughput measure characterize user pointing performance in virtual reality (VR) training systems and simulators well. Yet, pointing performance can be affected by the feedback users receive from a VR application. This work examines the effect of the pitch of auditory error feedback on user performance in a Fitts' task through a distributed experiment. In our first study, we used middle- and high-frequency sound feedback and demonstrated that high-pitch error feedback significantly decreases user performance in terms of time and throughput. In the second study, we used adaptive sound feedback, where we increased the frequency with the error rate, while asking subjects to execute the task "as fast/as precise/as fast and precise as possible". Results showed that adaptive sound feedback decreases the error rate for "as fast as possible" task execution without affecting the time. The results can be used to enhance and design various VR systems.

关键词： human-centered computing human Computer Interaction (HCI) human-centered computing Virtual Reality human-centered computing Pointing

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A Classification of Augmented Reality Approaches for Spatial Data Visualization 20

A Classification of Augmented Reality Approaches for Spatial...

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20th IEEE International Symposium on Mixed and Augmented Reality (ISMAR)

作者： Cheliotis, Kostas Liarokapis, Fotis Kokla, Margarita Tomai, Eleni Pastra, Katerina Darra, Athanasia Bezerianou, Maria Kavouras, Marinos Natl Tech Univ Athens Sch Rural Surveying & Geoinformat Engn Lab Cartog Athens Greece CYENS Ctr Excellence Nicosia Cyprus ATHENA Res Ctr Inst Language & Speech Proc Maroussi Greece Natl Tech Univ Athens Sch Rural Surveying & Geoinformat Engn Dept Geog & Reg Planning Athens Greece

ISBN: (纸本)9781665412988

The field of Augmented Reality (AR) has seen a rapid expansion within the past decades, with many sectors nowadays applying AR methodologies for their own particular visualization needs. One field in particular that has adopted AR visualization techniques is the geospatial sciences, as they have identified the inherent spatial nature of AR as particularly applicable for visualizing (geo)spatial relationships in systems of interest. However, while we can find multiple classification schemes for AR applications in AR literature, to our knowledge no such classification exists that focuses specifically on the spatial aspects of AR applications, namely the visualization size, scale, and acknowledgement of and alignment with the user's physical environment. Therefore no AR classification exists that is specifically applicable to the geospatial sciences. In this paper we present an initial classification of AR approaches for spatial data visualization, highlighting the different spatial characteristics that are of particular relevance to the geospatial sciences. We expect that the initial classification presented here will help researchers working with AR visualizations in organizing their application design with regard to its spatial characteristics.

关键词： human-centered computing human computer interaction (HCI) Interaction paradigms-Mixed / augmented reality human-centered computing Visualization Visualization theory, concepts and paradigms human-centered computing Visualization Visualization application domains Geographic visualization

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Amplifying Realities: Gradual and Seamless Scaling of Visual and Auditory Stimuli in Extended Reality 20

Amplifying Realities: Gradual and Seamless Scaling of Visual...

引用

20th IEEE International Symposium on Mixed and Augmented Reality (ISMAR)

作者： Choudhary, Zubin Univ Cent Florida Orlando FL 32816 USA

ISBN: (纸本)9781665412988

Existing literature in the field of extended reality has demonstrated that visual/auditory manipulations can change a person's perception and behavior. For example, a mismatch between the physical self and the virtual self can have psychological and behavioral implications. There are many different approaches that can incur a perceptual change. An under-explored field of research are gradual and subtle manipulations, such as scaling the food one eats or scaling the heads of people one sees. In this position paper, I provide an overview of my prior PhD research focusing on means to gradually and seamlessly scale visual and auditory stimuli in extended reality, and investigations of the corresponding changes in human perception.

关键词： computing methodologies Computer graphics Graphics systems and interfaces Virtual reality human-centered computing human computer interaction (HCI) Interaction paradigms Augmented reality human-centered computing human computer interaction (HCI) HCI design and evaluation methods User studies

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Atlas: Grammar-based Procedural Generation of Data Visualizations

Atlas: Grammar-based Procedural Generation of Data Visualiza...

引用

IEEE Visualization Conference (IEEE VIS)

作者： Liu, Zhicheng Chen, Chen Morales, Francisco Zhao, Yishan Univ Maryland Dept Comp Sci College Pk MD 20742 USA

ISBN: (纸本)9781665433358

We present Atlas, a procedural grammar for constructing data visualizations. Unlike most visualization grammars which use declarative specifications to describe visualization components, Atlas exposes the generative process of a visualization through a set of concatenated high-level production rules. Each of these rules describes how an input graphical object is created, transformed, or joined with abstract data to derive an output object. The visualization state can thus be inspected throughout the generative process. We demonstrate Atlas' expressivity through a catalog of visualization designs, and discuss the trade-offs in its design by comparing it to state-of-the-art grammars.

关键词： human-centered computing Visualization Visualization systems and tools Visualization toolkits

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Effects of Different Auditory Feedback Frequencies in Virtual Reality 3D Pointing Tasks

Effects of Different Auditory Feedback Frequencies in Virtua...

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28th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Batmaz, Anil Ufuk Stuerzlinger, Wolfgang Simon Fraser Univ Burnaby BC Canada

ISBN: (纸本)9781665440578

Auditory error feedback is commonly used in 3D Virtual Reality (VR) pointing experiments to increase participants' awareness of their misses. However, few papers describe the parameters of the auditory feedback, such as the frequency. In this study, we asked 15 participants to perform an ISO 9241-411 pointing task in a distributed remote experiment. In our study, we used three forms of auditory feedback, i.e., C4 (262 Hz), C8 (4186 Hz) and none. According to the results, we observed a speed-accuracy trade-off for the C8 tones compared to C4 ones: subjects were slower, and their throughput performance decreased with the C8 while their error rate decreased. Still, for larger targets there was no speed-accuracy trade-off, and subjects were only slower with C8 tones. Overall, the frequency of the feedback had a significant impact on the user's performance. We thus suggest that practitioners, developers, and designers report the frequency they used in their VR applications.

关键词： human-centered computing human Computer Interaction (HCI) human-centered computing Virtual Reality human-centered computing Pointing

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Effects of Virtual Environments and Self-representations on Redirected Jumping

Effects of Virtual Environments and Self-representations on ...

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28th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Li, Yi-Jun Wang, Miao Jin, De-Rong Steinicke, Frank Hu, Shi-Min Zhao, Qinping Beihang Univ State Key Lab Virtual Real Technol & Syst Beijing Peoples R China Peng Cheng Lab Shenzhen Guangdong Peoples R China Univ Hamburg Hamburg Germany Tsinghua Univ BNRist Beijing Peoples R China

ISBN: (纸本)9781665440578

We design experiments to measure the perception (detection thresholds for gains, presence, embodiment, intrinsic motivation, and cybersickness) and physical performance (heart rate intensity, preparation time, and actual jumping distance) of redirected jumping (RDJ), under six different combinations of virtual environments (VEs) (low and high visual richness) and self-representations (SRs) (invisible, shoes, human-like). Results suggested that both VEs and SRs influence users' perception and performance in RDJ, and have to be taken into account when designing locomotion techniques.

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

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