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检索条件"主题词=Visualization Design and evaluation methods"

共 222 条记录，以下是61-70 订阅

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Beyond Visuals : Examining the Experiences of Geoscience Professionals With Vision Disabilities in Accessing Data visualizations

Beyond Visuals : Examining the Experiences of Geoscience Pro...

引用

IEEE visualization Conference (VIS)

作者： Cherukuru, Nihanth W. Bailey, David A. Fourment, Tiffany Hatheway, Becca Holland, Marika M. Rehme, Matt Univ Corp Atmospheric Res UCAR Natl Ctr Atmospher Res NCAR Boulder CO 80307 USA

ISBN: (数字)9781665488129

ISBN: (纸本)9781665488129

Data visualizations are ubiquitous in all disciplines and have become the primary means of analysing data and communicating insights. However, the predominant reliance on visual encoding of data continues to create accessibility barriers for people who are blind/vision impaired resulting in their under representation in Science, Technology, Engineering and Mathematics (STEM) disciplines. This research study seeks to understand the experiences of professionals who are blind/vision impaired in one such STEM discipline (geo-sciences) in accessing data visualizations. In-depth, semi-structured interviews with seven professionals were conducted to examine the accessibility barriers and areas for improvement to inform accessibility research pertaining to data visualizations through a socio-technical lens. A reflexive thematic analysis revealed the negative impact of visualizations in influencing their career path, lack of data exploration tools for research, barriers in accessing works of peers and mismatched pace of visualization and accessibility research. The article also includes recommendations from the participants to address some of these accessibility barriers.

关键词： Human-centered computing visualization visualization design and evaluation methods Human-centered computing Accessibility Accessibility technologies

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The Stare-in-the-Crowd Effect in Virtual Reality 29

The Stare-in-the-Crowd Effect in Virtual Reality

引用

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

作者： Raimbaud, Pierre Jovane, Alberto Zibrek, Katja Pacchierotti, Claudio Christie, Marc Hoyet, Ludovic Pettre, Julien Olivier, Anne-Helene Univ Rennes IRISA CNRS INRIA Rennes France Univ Rennes INRIA IRISA CNRSM2S Rennes France

ISBN: (纸本)9781665496179

Nonverbal cues are paramount in real-world interactions. Among these cues, gaze has received much attention in the literature. In particular, previous work has shown a search asymmetry between directed and averted gaze towards the observer using photographic stimuli, with faster detection and longer fixation towards directed gaze by the observer. This is known as the stare-in-the-crowd effect. In this study, we investigate whether stare-in-the crowd effect is preserved in Virtual Reality (VR). To this end, we designed a within-subject experiment where 30 human users were immersed in a virtual environment in front of an audience of 11 virtual agents following 4 different gaze behaviours. We analysed the user's gaze behaviour when observing the audience, computing fixations and dwell time. We also collected the users' social anxiety score using a post-experiment questionnaire to control for some potential influencing factors. Results show that the stare-in-the-crowd effect is preserved in VR, as demonstrated by the significant differences between gaze behaviours, similarly to what was found in previous studies using photographic stimuli. Additionally, we found a negative correlation between dwell time towards directed gazes and users' social anxiety scores. Such results are encouraging for the development of expressive and reactive virtual humans, which can be animated to express natural interactive behaviour.

关键词： Human-centered computing visualization visualization design and evaluation methods Human-centered computing User studies Applied computing Law, social and behavioral sciences

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Towards Benchmark Data Generation for Feature Tracking in Scalar Fields

Towards Benchmark Data Generation for Feature Tracking in Sc...

引用

IEEE VIS Workshop on Topological Data Analysis and visualization (TopoInVis)

作者： Nilsson, Emma Lukasczyk, Jonas Bin Masood, Talha Garth, Christoph Hotz, Ingrid Linkoping Univ Linkoping Sweden TU Kaiserslautern Kaiserslautern Germany

ISBN: (数字)9781665493543

ISBN: (纸本)9781665493543

We describe a benchmark data generator for tracking methods for two- and three-dimensional time-dependent scalar fields. More and more topology-based tracking methods are presented in the visualization community, but the validation and evaluation of the tracking results are currently limited to qualitative visual approaches. We present a pipeline for creating different ground truth features that support evaluating tracking methods based on quantitative measures. In short, our approach randomly simulates a temporal point cloud with birth, death, split, merge, and continuation events, where the points are then used to derive a scalar field whose topological features correspond to the points. These scalar fields can be used as the input for different tracking methods, where the computed tracks can be compared against the ground truth feature evolution. This approach facilitates directly comparing the results of different tracking methods, independent of the initial feature characterization.

关键词： Human-centered computing visualization visualization design and evaluation methods Human-centered computing visualization visualization application domains Scientific visualization

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Lightweight Collision Detection Algorithm in Web3D Robot Simulation Platform

Lightweight Collision Detection Algorithm in Web3D Robot Sim...

引用

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

作者： Wang, Weiqiang Zhao, Hantao Jia, Jinyuan Tongji Univ Sch Software Engn Smart Web3D Media Lab Shanghai Peoples R China Southeast Univ Sch Cyber Sci & Engn Dhaka Bangladesh Purple Mt Labs Nanjing Peoples R China

ISBN: (纸本)9781665484022

In the field of the robotic industry, traditional robot simulation platforms require users to install specific software and to be equipped with high-performance computers. This paper designs a lightweight collision detection algorithm that is able to run smoothly from a web browser with a novel simulation platform for a humanoid robot. The proposed algorithm is based on the Morton code for bounding volume hierarchies, which uses the triangular patches detection algorithm to improve the accuracy of detection. Through the presented method, we can use the platform to edit the robot on any browser supporting device without installing extra plug-ins.

关键词： Collision detection M-BVH Web3D robot simulation platform Human-centered computing visualization visualization design and evaluation methods

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How Do We Measure Trust in Visual Data Communication? 9

How Do We Measure Trust in Visual Data Communication?

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9th IEEE evaluation and Beyond - Methodological Approaches for visualization (BELIV)

作者： Elhamdadi, Hamza Gaba, Aimen Kim, Yea-Seul Xiong, Cindy UMass Amherst Amherst MA 01003 USA Univ Wisconsin Madison WI USA

ISBN: (数字)9798350396294

ISBN: (纸本)9798350396294

Trust is fundamental to effective visual data communication between the visualization designer and the reader. Although personal experience and preference influence readers' trust in visualizations, visualization designers can leverage design techniques to create visualizations that evoke a "calibrated trust," at which readers arrive after critically evaluating the information presented. To systematically understand what drives readers to engage in "calibrated trust," we must first equip ourselves with reliable and valid methods for measuring trust. Computer science and data visualization researchers have not yet reached a consensus on a trust definition or metric, which are essential to building a comprehensive trust model in human-data interaction. On the other hand, social scientists and behavioral economists have developed and perfected metrics that can measure generalized and interpersonal trust, which the visualization community can reference, modify, and adapt for our needs. In this paper, we gather existing methods for evaluating trust from other disciplines and discuss how we might use them to measure, define, and model trust in data visualization research. Specifically, we discuss quantitative surveys from social sciences, trust games from behavioral economics, measuring trust through measuring belief updating, and measuring trust through perceptual methods. We assess the potential issues with these methods and consider how we can systematically apply them to visualization research.

关键词： Human-centered computing visualization visualization design and evaluation methods

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dGG, dRNG, DSC: New Degree-based Shape-based Faithfulness Metrics for Large and Complex Graph visualization 15

dGG, dRNG, DSC: New Degree-based Shape-based Faithfulness Me...

引用

IEEE 15th Pacific visualization Symposium (PacificVis)

作者： Hong, Seok-Hee Meidiana, Amyra Wood, James Ataides, Juan Pablo Eades, Peter Park, Kunsoo Univ Sydney Sydney NSW Australia Seoul Natl Univ Seoul South Korea

ISBN: (纸本)9781665423359

Shape-based metrics measure how faithfully a drawing D of a large graph G shows the structure of graph, by comparing the similarity between G and a proximity graph S computed from D. Although these metrics can successfully evaluate drawings of large graphs, they are limited to relatively sparse graphs, since existing metrics use planar proximity graphs GG (Gabriel Graph) and RNG (Relative Neighbourhood Graph). This paper presents new shape-based faithfulness metrics for evaluating drawings of large and complex graphs, using high-order proximity graphs k-GG and k-RNG. Extensive experiments demonstrate that our new shape-based metrics using degree-based proximity graphs dGG and dRNG can more accurately measure the faithfulness of drawings of large and complex graphs, with a significant improvement of over 100% better, on average, than the existing shape-based metrics using GG and RNG. Moreover, we present a new shape change faithfulness metric DSC for evaluating drawings of dynamic graphs, by measuring how proportional the geometric shape change in the drawings of dynamic graphs is to the ground truth change in dynamic graphs. Validation using deformation experiments support that DSC can accurately measure shape change faithfulness in dynamic graph drawing. Furthermore, we present extensive comparison experiments of ten popular graph layouts using our new shape-based metrics dGG, dRNG and DSC, to recommend which layouts can give a better shape-faithful graph drawing for large and complex graphs.

关键词： Human-centered computing visualization visualization design and evaluation methods

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High-Quality Surface-Based 3D Reconstruction Using 2.5D Maps

High-Quality Surface-Based 3D Reconstruction Using 2.5D Maps

引用

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

作者： Song, Lingxiao Yu, Xiao Di, Huijun Wang, Weiran Beijing Inst Technol Sch Comp Sci & Technol Beijing Peoples R China

ISBN: (纸本)9781665484022

Previous works on RGB-D reconstruction are based on voxels, points, or meshes,which are either too computationally expensive to represent high-resolution 3D models, or not convenient for model regularization to deal with noise and errors. In this paper, we propose a new method to reconstruct 3D models with more accurate geometric information and better texture. Our method uses abstract surfaces consisting of different points with similar information as units of the model. To reduce the complexity, we use 2.5D heightmaps to represent each surface in the reconstructed model, making it convenient to do regularization. Experiments demonstrate the effectiveness of our method.

关键词： Human-centered computing Human computer interaction Virtual reality Human-centered computing visualization visualization design and evaluation methods

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Jitsi360: Using 360 Images for Live Tours

Jitsi360: Using 360 Images for Live Tours

引用

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

作者： Nassani, Alaeddin Bai, Huidong Billinghurst, Mark Univ Auckland Auckland New Zealand

ISBN: (纸本)9781665484022

In this poster, we present a system for sharing immersive 360 images for live tours. While the sharing of prerecorded 360 video and images is becoming commonplace, there have been fewer systems presented that support live-sharing of 360 images. We customised a video conferencing platform to enable dozens of people to see the same 360 content together while having a live call. We describe our system and pilot user study results from using it for a virtual guided tour. Compared to sharing non 360 images on Zoom, our system was felt to be more immersive, enjoyable, and easy to use.

关键词： Human-centered computing visualization visualization techniques Treemaps Human-centered computing visualization visualization design and evaluation methods

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Why? Why not? When? Visual Explanations of Agent Behaviour in Reinforcement Learning 15

Why? Why not? When? Visual Explanations of Agent Behaviour i...

引用

IEEE 15th Pacific visualization Symposium (PacificVis)

作者： Mishra, Aditi Soni, Utkarsh Huang, Jinbin Bryan, Chris Arizona State Univ Tempe AZ 85287 USA

ISBN: (纸本)9781665423359

Reinforcement learning (RL) is used in many domains, including autonomous driving, robotics, stock trading, and video games. Unfortunately, the black box nature of RL agents, combined with legal and ethical considerations, makes it increasingly important that humans (including those are who not experts in RL) understand the reasoning behind the actions taken by an RL agent, particularly in safety-critical domains. To help address this challenge, we introduce PolicyExplainer, a visual analytics interface which lets the user directly query an autonomous agent. PolicyExplainer visualizes the states, policy, and expected future rewards for an agent, and supports asking and answering questions such as: "Why take this action? Why not take this other action? When is this action taken?" PolicyExplainer is designed based upon a domain analysis with RL researchers, and is evaluated via qualitative and quantitative assessments on a trio of domains: taxi navigation, a stack bot domain, and drug recommendation for HIV *** find that PolicyExplainer's visual approach promotes trust and understanding of agent decisions better than a state-of-the-art text-based explanation approach. Interviews with domain practitioners provide further validation for PolicyExplainer as applied to safety-critical domains. Our results help demonstrate how visualization-based approaches can be leveraged to decode the behavior of autonomous RL agents, particularly for RL non-experts.

关键词： Human-centered computing visualization visualization techniques Treemaps Human-centered computing visualization visualization design and evaluation methods

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3Dify: Extruding Common 2D Charts with Timeseries Data

3Dify: Extruding Common 2D Charts with Timeseries Data

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

作者： Brath, Richard Matusiak, Martin Uncharted Software Inc Toronto ON Canada

ISBN: (纸本)9781665484022

3D charts are not common in financial services. We review chart use in practice. We create 3D financial visualizations starting with 2D charts used extensively in financial services, then extend into the third dimension with timeseries data. We embed the 2D view into the the 3D scene;constrain interaction and add depth cues to facilitate comprehension. Usage and extensions indicate success.

关键词： Human-centered computing visualization visualization application domains Information visualization Human-centered computing visualization visualization design and evaluation methods

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