检索结果-内蒙古大学图书馆

Visual Cue Based Corrective Feedback for Motor Skill Training in Mixed Reality: A Survey

IEEE TRANSACTIONS ON visualization AND COMPUTER GRAPHICS 2024年第7期30卷 3121-3134页

作者： Diller, Florian Scheuermann, Gerik Wiebel, Alexander Hsch Worms Univ Appl Sci UX Vis Grp D-67549 Worms Germany Univ Leipzig BSV Grp D-04109 Leipzig Germany

When learning a motor skill it is helpful to get corrective feedback from an instructor. This will support the learner to execute the movement correctly. With modern technology, it is possible to provide this feedback via mixed reality. In most cases, this involves visual cues to help the user understand the corrective feedback. We analyzed recent research approaches utilizing visual cues for feedback in mixed reality. The scope of this article is visual feedback for motor skill learning, which involves physical therapy, exercise, rehabilitation etc. While some of the surveyed literature discusses therapeutic effects of the training, this article focuses on visualization techniques. We categorized the literature from a visualization standpoint, including visual cues, technology and characteristics of the feedback. This provided insights into how visual feedback in mixed reality is applied in the literature and how different aspects of the feedback are related. The insights obtained can help to better adjust future feedback systems to the target group and their needs. This article also provides a deeper understanding of the characteristics of the visual cues in general and promotes future, more detailed research on this topic.

关键词： visualization Mixed reality Augmented reality Training Task analysis Sports Feedback loop Human-centered computing visualization visualization techniques and methodologies interaction techniques virtual and augmented reality

来源：评论

学校读者我要写书评

暂无评论

Watertight Incremental Heightfield Tessellation

引用

IEEE TRANSACTIONS ON visualization AND COMPUTER GRAPHICS 2023年第9期29卷 3888-3899页

作者： Cornel, Daniel Zechmeister, Silvana Groeller, Eduard Waser, Jurgen VRVis Forsch GmbH A-1220 Vienna Austria TU Wien A-1040 Vienna Austria

In this article, we propose a method for the interactive visualization of medium-scale dynamic heightfields without visual artifacts. Our data fall into a category too large to be rendered directly at full resolution, but small enough to fit into GPU memory without pre-filtering and data streaming. We present the real-world use case of unfiltered flood simulation data of such medium scale that need to be visualized in real time for scientific purposes. Our solution facilitates compute shaders to maintain a guaranteed watertight triangulation in GPU memory that approximates the interpolated heightfields with view-dependent, continuous levels of detail. In each frame, the triangulation is updated incrementally by iteratively refining the cached result of the previous frame to minimize the computational effort. In particular, we minimize the number of heightfield sampling operations to make adaptive and higher-order interpolations viable options. We impose no restriction on the number of subdivisions and the achievable level of detail to allow for extreme zoom ranges required in geospatial visualization. Our method provides a stable runtime performance and can be executed with a limited time budget. We present a comparison of our method to three state-of-the-art methods, in which our method is competitive to previous non-watertight methods in terms of runtime, while outperforming them in terms of accuracy.

关键词： visualization techniques and methodologies heightfield rendering terrain rendering level of detail tessellation

来源：评论

学校读者我要写书评

暂无评论

KelpFusion: A Hybrid Set visualization Technique

引用

IEEE TRANSACTIONS ON visualization AND COMPUTER GRAPHICS 2013年第11期19卷 1846-1858页

作者： Meulemans, Wouter Riche, Nathalie Henry Speckmann, Bettina Alper, Basak Dwyer, Tim TU Eindhoven NL-5600 MB Eindhoven Netherlands Microsoft Res Redmond WA 98052 USA Univ Calif Santa Barbara Santa Barbara CA 93106 USA Monash Univ Caulfield Vic 3145 Australia

We present KelpFusion: a method for depicting set membership of items on a map or other visualization using continuous boundaries. KelpFusion is a hybrid representation that bridges hull techniques such as Bubble Sets and Euler diagrams and line-and graph-based techniques such as LineSets and Kelp Diagrams. We describe an algorithm based on shortest-path graphs to compute KelpFusion visualizations. Based on a single parameter, the shortest-path graph varies from the minimal spanning tree to the convex hull of a point set. Shortest-path graphs aim to capture the shape of a point set and smoothly adapt to sets of varying densities. KelpFusion fills enclosed faces based on a set of simple legibility rules. We present the results of a controlled experiment comparing KelpFusion to Bubble Sets and LineSets. We conclude that KelpFusion outperforms Bubble Sets both in accuracy and completion time and outperforms LineSets in completion time.

关键词： Information visualization visualization techniques and methodologies

来源：评论

学校读者我要写书评

暂无评论

Automated thresholding and analysis of microCT scanned bread dough

引用

JOURNAL OF MICROSCOPY 2014年第2期256卷 100-110页

作者： Jensen, S. Samanta, S. Chakrabarti-Bell, S. Regenauer-Lieb, K. Siddique, K. H. M. Wang, S. CSIRO Kensington WA Australia CSIRO Food Futures Natl Res Flagship Canberra ACT Australia Univ Western Australia Sch Earth & Environm Crawley WA Australia Univ Western Australia Western Australian Geothermal Ctr Excellence Crawley WA Australia Univ Western Australia UWA Inst Agr Crawley WA Australia

Computer aided x-ray microtomography is an increasingly popular method to investigate the structure of materials. Continuing improvements in the technique are resulting in increasingly larger data sets. The analysis of these data sets generally involves executing a static workflow for multiple samples and is generally performed manually by researchers. Executing these processes requires a significant time investment. A workflow which is able to automate the activities of the user would be useful. In this work, we have developed an automated workflow for the analysis of microtomography scanned bread dough data sets averaging 5GB in size. Comparing the automated workflow with the manual workflow indicates a significant amount of the time spent (33% in the case of bread dough) on user interactions in manual method. Both workflows return similar results for porosity and pore frequency distribution. Finally, by implementing an automated workflow, users save the time which would be required to manually execute the workflow. This time can be spent on more productive tasks. Lay Description Technological advances in x-ray scanning techniques have resulted in larger, more complex microtomographic datasets. Processing these datasets can be both a time consuming and oftentimes repetitive task as datasets of similar materials tend to have similar characteristics. What if there was a better way to analyze these datasets? Our research has investigated using computer programming languages instead of researchers to automatically perform tasks involved in the analysis of microtomographic datasets of ten scanned bread dough samples. Our results highlighted the benefits of using computers to automate the analysis process, demonstrating that nearly 33% of the time required is due to researchers interacting with the analysis programs and not from the analysis itself. The quantitative data provided by the automated workflow are nearly identical to results found by researchers. This resear

关键词： Bread dough microstructure visualization systems and software visualization techniques and methodologies x-ray microtomography

来源：评论

学校读者我要写书评

暂无评论

Feature Level-Sets: Generalizing Iso-Surfaces to Multi-Variate Data

引用

IEEE TRANSACTIONS ON visualization AND COMPUTER GRAPHICS 2020年第2期26卷 1308-1319页

作者： Jankowai, Jochen Hotz, Ingrid Linkoping Inst Technol Dept Sci & Technol S-60233 Norrkoping Sweden

Iso-surfaces or level-sets provide an effective and frequently used means for feature visualization. However, they are restricted to simple features for uni-variate data. The approach does not scale when moving to multi-variate data or when considering more complex feature definitions. In this paper, we introduce the concept of traits and feature level-sets, which can be understood as a generalization of level-sets as it includes iso-surfaces, and fiber surfaces as special cases. The concept is applicable to a large class of traits defined as subsets in attribute space, which can be arbitrary combinations of points, lines, surfaces and volumes. It is implemented into a system that provides an interface to define traits in an interactive way and multiple rendering options. We demonstrate the effectiveness of the approach using multi-variate data sets of different nature, including vector and tensor data, from different application domains.

关键词： Tensile stress Data visualization Rendering (computer graphics) Transfer functions Geometry Feature extraction Multivariate visualization visualization techniques and methodologies approximation of surfaces and contours

来源：评论

学校读者我要写书评

暂无评论

Graph signatures for visual analytics

引用

IEEE TRANSACTIONS ON visualization AND COMPUTER GRAPHICS 2006年第6期12卷 1399-1413页

作者： Wong, Pak Chung Foote, Harlan Chin, George, Jr. Mackey, Patrick Perrine, Ken Pacific NW Natl Lab Richland WA 99352 USA

We present a visual analytics technique to explore graphs using the concept of a data signature. A data signature, in our context, is a multidimensional vector that captures the local topology information surrounding each graph node. Signature vectors extracted from a graph are projected onto a low-dimensional scatterplot through the use of scaling. The resultant scatterplot, which reflects the similarities of the vectors, allows analysts to examine the graph structures and their corresponding real-life interpretations through repeated use of brushing and linking between the two visualizations. The interpretation of the graph structures is based on the outcomes of multiple participatory analysis sessions with intelligence analysts conducted by the authors at the Pacific Northwest National Laboratory. The paper first uses three public domain data sets with either well-known or obvious features to explain the rationale of our design and illustrate its results. More advanced examples are then used in a customized usability study to evaluate the effectiveness and efficiency of our approach. The study results reveal not only the limitations and weaknesses of the traditional approach based solely on graph visualization, but also the advantages and strengths of our signature-guided approach presented in the paper.

关键词： data and knowledge visualization information visualization visualization techniques and methodologies graphs and networks

来源：评论

学校读者我要写书评

暂无评论

Accelerating volume rendering by ray leaping with back steps

引用

COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2010年第2期97卷 99-113页

作者： Celebi, Oemer Cengiz Cevik, Ulus Cukurova Univ Adana Turkey

The methods for visualizing sampled spatial scientific data are known as volume rendering, where images are generated by computing 2D projections of 3D volume data. Since all the discrete data cells participate in the generation of each image, rendering time grows linearly with the resolution and complexity of the dataset. Empty cells in the data, which do not contribute to the final image, are of the important factors that increase the rendering time. During recent years, researchers have highly concentrated on improving the performance of these methods to achieve real time rendering. Skipping the empty space provides significant speedup and known as space leaping which requires implementation of special data structures and pre-processing. This paper presents a simple and efficient technique, that we name "ray-leaping," for the acceleration of total rendering process and eliminates the need for special data structures and pre-processing. (C) 2009 Elsevier Ireland Ltd. All rights reserved.

关键词： Information visualization Volume visualization visualization techniques and methodologies Space leaping Ray leaping

来源：评论

学校读者我要写书评

暂无评论

Generating graphs for visual analytics through interactive sketching

引用

IEEE TRANSACTIONS ON visualization AND COMPUTER GRAPHICS 2006年第6期12卷 1386-1398页

作者： Wong, Pak Chung Foote, Harlan Mackey, Patrick Perrine, Ken Chin, George, Jr. Pacific NW Natl Lab Richland WA 99352 USA

We introduce an interactive graph generator, GreenSketch, designed to facilitate the creation of descriptive graphs required for different visual analytics tasks. The human-centric design approach of GreenSketch enables users to master the creation process without specific training or prior knowledge of graph model theory. The customized user interface encourages users to gain insight into the connection between the compact matrix representation and the topology of a graph layout when they sketch their graphs. Both the human-enforced and machine-generated randomnesses supported by GreenSketch provide the flexibility needed to address the uncertainty factor in many analytical tasks. This paper describes more than two dozen examples that cover a wide variety of graph creations from a single line of nodes to a real-life small-world network that describes a snapshot of telephone connections. While the discussion focuses mainly on the design of GreenSketch, we include a case study that applies the technology in a visual analytics environment and a usability study that evaluates the strengths and weaknesses of our design approach.

关键词： data and knowledge visualization information visualization visualization techniques and methodologies graphs and networks

来源：评论

学校读者我要写书评

暂无评论

Are Metrics Enough? Guidelines for Communicating and Visualizing Predictive Models to Subject Matter Experts

引用

IEEE TRANSACTIONS ON visualization AND COMPUTER GRAPHICS 2024年第7期30卷 4137-4153页

作者： Suh, Ashley Appleby, Gabriel Anderson, Erik W. Finelli, Luca Chang, Remco Cashman, Dylan Tufts Univ Medford MA 02155 USA Novartis Pharmaceut Data Sci & AI CH-4033 Basel Switzerland

Presenting a predictive model's performance is a communication bottleneck that threatens collaborations between data scientists and subject matter experts. Accuracy and error metrics alone fail to tell the whole story of a model - its risks, strengths, and limitations - making it difficult for subject matter experts to feel confident in their decision to use a model. As a result, models may fail in unexpected ways or go entirely unused, as subject matter experts disregard poorly presented models in favor of familiar, yet arguably substandard methods. In this paper, we describe an iterative study conducted with both subject matter experts and data scientists to understand the gaps in communication between these two groups. We find that, while the two groups share common goals of understanding the data and predictions of the model, friction can stem from unfamiliar terms, metrics, and visualizations - limiting the transfer of knowledge to SMEs and discouraging clarifying questions being asked during presentations. Based on our findings, we derive a set of communication guidelines that use visualization as a common medium for communicating the strengths and weaknesses of a model. We provide a demonstration of our guidelines in a regression modeling scenario and elicit feedback on their use from subject matter experts. From our demonstration, subject matter experts were more comfortable discussing a model's performance, more aware of the trade-offs for the presented model, and better equipped to assess the model's risks - ultimately informing and contextualizing the model's use beyond text and numbers.

关键词： Data models Data visualization Predictive models Interviews Data science Guidelines Stakeholders Data communications aspects human factors modeling and prediction visualization techniques and methodologies

来源：评论

学校读者我要写书评

暂无评论

CiSE: A Circular Spring Embedder Layout Algorithm

引用

IEEE TRANSACTIONS ON visualization AND COMPUTER GRAPHICS 2013年第6期19卷 953-966页

作者： Dogrusoz, Ugur Belviranli, Mehmet E. Dilek, Alptug Bilkent Univ Dept Comp Engn TR-06800 Ankara Turkey Univ Calif Riverside Dept Comp Sci & Engn Riverside CA 92521 USA Sci & Technol Res Council Turkey TUBITAK BILGEM TR-06100 Ankara Turkey

We present a new algorithm for automatic layout of clustered graphs using a circular style. The algorithm tries to determine optimal location and orientation of individual clusters intrinsically within a modified spring embedder. Heuristics such as reversal of the order of nodes in a cluster and swap of neighboring node pairs in the same cluster are employed intermittently to further relax the spring embedder system, resulting in reduced inter-cluster edge crossings. Unlike other algorithms generating circular drawings, our algorithm does not require the quotient graph to be acyclic, nor does it sacrifice the edge crossing number of individual clusters to improve respective positioning of the clusters. Moreover, it reduces the total area required by a cluster by using the space inside the associated circle. Experimental results show that the execution time and quality of the produced drawings with respect to commonly accepted layout criteria are quite satisfactory, surpassing previous algorithms. The algorithm has also been successfully implemented and made publicly available as part of a compound and clustered graph editing and layout tool named CHISIO.

关键词： Information visualization visualization techniques and methodologies visualization systems and software graph algorithms algorithm design and analysis graph visualization graph drawing force-directed layout circular layout clustered graphs sequence alignment

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：