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检索条件"主题词=Human-centered computing"

共 2478 条记录，以下是411-420 订阅

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Projection Ensemble: Visualizing the Robust Structures of Multidimensional Projections

Projection Ensemble: Visualizing the Robust Structures of Mu...

引用

IEEE Conference on Visualization and Visual Analytics (IEEE VIS)

作者： Jung, Myeongwon Choi, Jiwon Jo, Jaemin Sungkyunkwan Univ Seoul South Korea

ISBN: (纸本)9798350325577

We introduce Projection Ensemble, a novel approach for identifying and visualizing robust structures across multidimensional projections. Although multidimensional projections, such as t-Stochastic Neighbor Embedding (t-SNE), have gained popularity, their stochastic nature often leads the user to interpret the structures that arise by chance and make erroneous findings. To overcome this limitation, we present a frequent subgraph mining algorithm and a visualization interface to extract and visualize the consistent structures across multiple projections. We demonstrate that our system not only identifies trustworthy structures but also detects accidental clustering or separation of data points.

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

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Exploring the Effects of Virtually-Augmented Display Sizes on Users' Spatial Memory in Smartwatches 22

Exploring the Effects of Virtually-Augmented Display Sizes o...

引用

22nd IEEE International Symposium on Mixed and Augmented Reality (ISMAR)

作者： Marium-E-Jannat Hasant, Khalad Univ British Columbia Okanagan Kelowna BC Canada

ISBN: (纸本)9798350328387

The small display size of the smartwatches makes it difficult to display large amounts of information on the device. Prior work explored leveraging a second device (e.g., Head-mounted displays) to extend the space where users can access large information space with virtual displays anchored on their wrists. Though researchers showed that having an additional virtual screen increased information bandwidth, little is known about the effect of virtual display sizes on users' performance. In this paper, we examined the impact of display sizes on spatial memory, workload, and user experience to better understand the prospects of virtually-augmented displays for smartwatches. Results from a user study revealed that a 4.8 inches display size can be the "sweet spot" for the virtually-augmented displays to ensure improved spatial memory performance and better user experience with less workload. Finally, we provided a set of design guidelines focusing to display size, spatial memory, user experience, and workload for designing virtually augmented user interfaces for smartwatches.

关键词： human-centered computing human computer interaction Interaction paradigms Mixed / augmented reality human-centered computing human computer interaction HCI design and evaluation methods User studies

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MetaStackVis: Visually-Assisted Performance Evaluation of Metamodels 16

MetaStackVis: Visually-Assisted Performance Evaluation of Me...

引用

IEEE 16th Pacific Visualization Symposium (IEEE PacificVis)

作者： Ploshchik, Ilya Chatzimparmpas, Angelos Kerren, Andreas Linnaeus Univ Vaxjo Sweden Linkoping Univ Linkoping Sweden

ISBN: (纸本)9798350321241

Stacking (or stacked generalization) is an ensemble learning method with one main distinctiveness from the rest: even though several base models are trained on the original data set, their predictions are further used as input data for one or more metamodels arranged in at least one extra layer. Composing a stack of models can produce high-performance outcomes, but it usually involves a trial-and-error process. Therefore, our previously developed visual analytics system, StackGenVis, was mainly designed to assist users in choosing a set of top-performing and diverse models by measuring their predictive performance. However, it only employs a single logistic regression metamodel. In this paper, we investigate the impact of alternative metamodels on the performance of stacking ensembles using a novel visualization tool, called MetaStackVis. Our interactive tool helps users to visually explore different singular and pairs of metamodels according to their predictive probabilities and multiple validation metrics, as well as their ability to predict specific problematic data instances. MetaStackVis was evaluated with a usage scenario based on a medical data set and via expert interviews.

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

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Applications of Interactive Style Transfer to Virtual Gallery

Applications of Interactive Style Transfer to Virtual Galler...

引用

30th IEEE Conference Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Wu, Xin-Han Chien, Hsin-Ju Hung, Yi-Ping Huang, Yen Nun

ISBN: (纸本)9798350348392

Since the outbreak of the epidemic in recent years, many events have been held online to avoid spreading illness, such as the virtual gallery. Therefore, we propose an interactive style transfer virtual gallery system. Users can perform style transfer on 2D objects and 3D objects, where 2D objects include pictures and paper jams, and 3D objects include frames and 3D artworks. The results show that it not only makes the viewing process more interesting but also deepens the impression of the artwork through the process of choosing different styles.

关键词： Style Transfer Virtual Gallery human-centered computing human computer interaction(HCI) User studies

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Streamlining Epilepsy Surgery Planning Rounds with Virtual Reality

Streamlining Epilepsy Surgery Planning Rounds with Virtual R...

引用

30th IEEE Conference Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Aminolroaya, Zahra Wiebe, Samuel Willett, Wesley Josephson, Colin B. McLeod, Graham Maurer, Frank Univ Calgary Comp Sci Calgary AB Canada Univ Calgary Clin Neurosci Calgary AB Canada

ISBN: (纸本)9798350348392

We introduce RealityFlow, a virtual reality (VR) system designed to assist neurologists in a clinical workflow of planning epilepsy surgery. RealityFlow offers 3D direct VR manipulation to prepare data, integrates spatial and temporal information pieces for demonstration in a 3D space, and introduces a novel visualization of seizure propagation to help neurologists analyze and present a seizure spread and its types.

关键词： human-centered computing Virtual reality human-centered computing Scientific visualization humancentered computing Visualization Visualization techniques

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Effect of Grip Style on Peripersonal Target Pointing in VR Head Mounted Displays 22

Effect of Grip Style on Peripersonal Target Pointing in VR H...

引用

22nd IEEE International Symposium on Mixed and Augmented Reality (ISMAR)

作者： Batmaz, Anil Ufuk Turkmen, Rumeysa Sarac, Mine Machuca, Mayra Donaji Barrera Stuerzlinger, Wolfgang Concordia Univ Montreal PQ Canada Kadir Has Univ Istanbul Turkiye Dalhousie Univ Halifax NS Canada Simon Fraser Univ Burnaby BC Canada

ISBN: (纸本)9798350328387

When working in Virtual Reality (VR), the user's performance is affected by how the user holds the input device (e.g., controller), typically using either a precision or a power grip. Previous work examined these grip styles for 3D pointing at targets at different depths in peripersonal space and found that participants had a lower error rate with the precision grip but identified no difference in movement speed, throughput, or interaction with target depth. Yet, this previous experiment was potentially affected by tracking differences between devices. This paper reports an experiment that partially replicates and extends the previous study by evaluating the effect of grip style on the 3D selection of nearby targets with the same device. Furthermore, our experiment re-investigates the effect of the vergence-accommodation conflict (VAC) present in current stereo displays on 3D pointing in peripersonal space. Our results show that grip style significantly affects user performance. We hope that our results are useful for researchers and designers when creating virtual environments.

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

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Augmented Reality as a Visualization Technique for Scholarly Publications in Astronomy: An Empirical Evaluation

Augmented Reality as a Visualization Technique for Scholarly...

引用

IEEE Conference on Visualization and Visual Analytics (IEEE VIS)

作者： Adams, Jane L. South, Laura Coltekin, Arzu Goodman, Alyssa A. Borkin, Michelle A. Northeastern Univ Boston MA 02115 USA Univ Appl Sci & Arts Northwestern Switzerland FHNW Oberentfelden Switzerland

ISBN: (纸本)9798350325577

We present a mixed methods user study evaluating augmented reality (AR) as a visualization technique for use in astronomy journal publications. This work is motivated by the highly spatial nature of scientific visualizations employed in astronomy, including spatial reasoning tasks for hypothesis generation and scientific communications. In this 52-person user study, we evaluate two AR approaches (one traditional tabletop projection and the other with a 'tangible' aid) as spatial 3D visualization techniques, as compared to a baseline 3D rendering on a phone. We identify a significant difference in mental and physical workload between the two AR conditions in men and women. Qualitatively, through thematic coding of interviews, we identify notable observed differences ranging from device-specific physical challenges, to subdomain-specific utility within astronomy. The confluence of quantitative and qualitative results suggest a tension between workload and engagement when comparing non-AR and AR technologies. We summarize these findings and contribute them for reference in data visualization research furthering novel scientific communications in astronomy journal publications.

关键词： human-centered computing Visualization Empirical studies in visualization human Computer Interaction (HCI) Interaction paradigms Mixed / augmented reality

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Compact Phase Histograms for Guided Exploration of Periodicity

Compact Phase Histograms for Guided Exploration of Periodici...

引用

IEEE Conference on Visualization and Visual Analytics (IEEE VIS)

作者： Franke, Max Koch, Steffen Univ Stuttgart Stuttgart Germany

ISBN: (纸本)9798350325577

Periodically occurring accumulations of events or measured values are present in many time-dependent datasets and can be of interest for analyses. The frequency of such periodic behavior is often not known in advance, making it difficult to detect and tedious to explore. Automated analysis methods exist, but can be too costly for smooth, interactive analysis. We propose a compact visual representation that reveals periodicity by showing a phase histogram for a given period length that can be used standalone or in combination with other linked visualizations. Our approach supports guided, interactive analyses by suggesting other period lengths to explore, which are ranked based on two quality measures. We further describe how the phase can be mapped to visual representations in other views to reveal periodicity there.

关键词： human-centered computing Visualization Visualization techniques

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Stretchy: Enhancing Object Sensation Through Multisensory Feedback and Muscle Input

Stretchy: Enhancing Object Sensation Through Multisensory Fe...

引用

30th IEEE Conference Virtual Reality and 3D User Interfaces (IEEE VR)

作者： Vanichvoranun, Nicha Kim, Bowon Kim, Dooyoung Lee, Jeongmi Yoon, Sang Ho Woo, Woontack KAIST HCI Tech Daejeon South Korea KAIST VCL Daejeon South Korea KAIST UVR Daejeon South Korea KAIST UVR KAIST KI ITC ARRC Daejeon South Korea

ISBN: (纸本)9798350348392

Current works on 3D interaction methods mainly focus on rigid object manipulation and selection, while very few have been done on elastic object interaction. Therefore, we suggest a novel interaction method to observe and manipulate virtual fabric in a VR environment. We use multi-sensory pseudo-haptic feedback (a combination of tactile and visual feedback) and muscle strength data (EMG) to perceive the stiffness of the virtual fabric and flexible objects. For demonstration, we make fabric patches with various stiffness, and the stiffness difference can be distinguished. Our system can be implemented in a virtual cloth store to give consumers information about product stiffness and texture.

关键词： human-centered computing Interaction design Interaction design process and methods User centered design

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Draco 2: An Extensible Platform to Model Visualization Design

Draco 2: An Extensible Platform to Model Visualization Desig...

引用

IEEE Conference on Visualization and Visual Analytics (IEEE VIS)

作者： Yang, Junran Gyarmati, Peter Ferenc Zeng, Zehua Moritz, Dominik Univ Washington Seattle WA 98195 USA Univ Vienna Vienna Austria Univ Maryland College Pk MD USA Carnegie Mellon Univ Pittsburgh PA USA

ISBN: (纸本)9798350325577

Draco introduced a constraint-based framework to model visualization design in an extensible and testable form. It provides a way to abstract design guidelines from theoretical and empirical studies and applies the knowledge in automated design tools. However, Draco is challenging to use because there is limited tooling and documentation. In response, we present Draco 2, the successor with (1) a more flexible visualization specification format, (2) a comprehensive test suite and documentation, and (3) flexible and convenient APIs. We designed Draco 2 to be more extensible and easier to integrate into visualization systems. We demonstrate these advantages and believe that they make Draco 2 a platform for future research.

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

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