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G6:A web-based library for graph visualization

Visual Informatics 2021年第4期5卷 49-55页

作者： Yanyan Wang Zhanning Bai Zhifeng Lin Xiaoqing Dong Yingchaojie Feng Jiacheng Pan Wei Chen Ant Group China Alibaba Group China tate Key Lab of CAD&CG Zhejiang UniversityHangzhouZhejiangChina

Authoring graph visualization poses great challenges to developers due to its high requirements on both domain knowledge and development *** existing libraries and tools reduce the difficulty of generating graph visualization,there are still many *** work closely with developers and formulate several design goals,then design and implement G6,a web-based library for graph *** combines template-based configuration for high usability and flexible customization for high *** enhance development efficiency,G6 proposes a range of optimizations,including state management and interaction *** demonstrate its capabilities through an extensive gallery,a quantitative performance evaluation,and an expert interview.G6 was first released in 2017 and has been iterated for 317 *** has served as a web-based library for thousands of applications and received 8312 stars on GitHub.

关键词： Graph visualization Node-link diagram web-based visualization visualization library

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Ancient coins' surface inspection with web-based neural RTI visualization 9

Ancient coins' surface inspection with web-based neural RTI ...

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Conference on Optics for Arts, Architecture, and Archaeology (O3A) IX

作者： Righetto, Leonardo Gobbetti, Enrico Ponchio, Federico Traviglia, Arianna De Bernardin, Michela Giachetti, Andrea Univ Verona Str La Grazie 15 I-37134 Verona Italy CRS4 Visual Comp Via Ampere 2 I-09134 Cagliari Italy ISTI CNR Via Giuseppe Moruzzi I-56127 Pisa Italy Ctr Cultural Heritage Technol Ist Italiano Tecnol I-30170 Venice Italy

ISBN: (纸本)9781510664494;9781510664500

The use of neural encodings has the potential to replace the commonly used polynomial fitting in the analysis of artwork surface based on Reflectance Transformation Imaging (RTI), as it has proved to result in more compact encoding with better relight quality, but it is still not widely used due to the lack of efficient implementations available to practitioners. In this work, we describe an optimized system to encode/decode neural relightable images providing interactive visualization in a web interface allowing multi-layer visualization and annotation. To develop it, we performed several experiments testing different decoder architectures and input processing pipelines, evaluating the quality of the results on specific benchmarks to find the optimal tradeoff between relighting quality and efficiency. A specific decoder has been then implemented for the web and integrated into an advanced visualisation tool. The system has been tested for the analysis of a group of ancient Roman bronze coins that present scarce readability and varying levels of preservation and that have been acquired with a multispectral light dome. Their level of corrosion and degradation, which in some cases hinders the recognition of the images, numerals, or text represented on them, makes the system testing particularly challenging and complex. Testing on such a real case scenario, however, enables us to determine the actual improvement that this new RTI visualization tool can offer to numismatists in their ability to identify the coins.

关键词： Neural relighting web-based visualization

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A simple web-based tool for multi-spectral surface visualization 27

A simple web-based tool for multi-spectral surface visualiza...

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Conference on Algorithms, Technologies, and Applications for Multispectral and Hyperspectral Imaging XXVII

作者： Padhye, Snehal Messinger, David Ferwerda, James A. Rochester Inst Technol Chester F Carlson Ctr Imaging Sci One Lomb Mem Dr Rochester NY 14623 USA

ISBN: (数字)9781510642928

ISBN: (纸本)9781510642928

In this paper we describe a web-based application we have developed that allows visualization of the multi-spectral reflectance properties of three-dimensional surfaces. To develop this application, we employ a 3D computer graphics framework that enables us to combine spectral data with other object features such as topography and reflectance properties. The cross-platform application runs in any modern web browser, has an interactive interface, and does not require the installation or maintenance of any custom or proprietary software packages. The application is configured as a standard HTML/JavaScript client-server system, which provides flexibility for working with data in local or remote setups.

关键词： Multi-spectral Imaging web-based visualization open-source cross-platform

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Residency Octree: A Hybrid Approach for Scalable web-based Multi-Volume Rendering

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IEEE TRANSACTIONS ON visualization AND COMPUTER GRAPHICS 2024年第1期30卷 1380-1390页

作者： Herzberger, Lukas Hadwiger, Markus Krueger, Robert Sorger, Peter Pfister, Hanspeter Groeller, Eduard Beyer, Johanna TU Wien Vienna Austria King Abdullah Univ Sci & Technol KAUST Thuwal Saudi Arabia Harvard Univ John A Paulson Sch Engn & Appl Sci Cambridge MA USA Harvard Med Sch Cambridge MA USA

We present a hybrid multi-volume rendering approach based on a novel Residency Octree that combines the advantages of out-of-core volume rendering using page tables with those of standard octrees. Octree approaches work by performing hierarchical tree traversal. However, in octree volume rendering, tree traversal and the selection of data resolution are intrinsically coupled. This makes fine-grained empty-space skipping costly. Page tables, on the other hand, allow access to any cached brick from any resolution. However, they do not offer a clear and efficient strategy for substituting missing high-resolution data with lower-resolution data. We enable flexible mixed-resolution out-of-core multi-volume rendering by decoupling the cache residency of multi-resolution data from a resolution-independent spatial subdivision determined by the tree. Instead of one-to-one node-to-brick correspondences, each residency octree node is mapped to a set of bricks from different resolution levels. This makes it possible to efficiently and adaptively choose and mix resolutions, adapt sampling rates, and compensate for cache misses. At the same time, residency octrees support fine-grained empty-space skipping, independent of the data subdivision used for caching. Finally, to facilitate collaboration and outreach, and to eliminate local data storage, our implementation is a web-based, pure client-side renderer using webGPU and webAssembly. Our method is faster than prior approaches and efficient for many data channels with a flexible and adaptive choice of data resolution.

关键词： Volume rendering ray-guided rendering large-scale data out-of-core rendering multi-resolution multi-channel web-based visualization

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iVisDesigner: Expressive Interactive Design of Information visualizations

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IEEE TRANSACTIONS ON visualization AND COMPUTER GRAPHICS 2014年第12期20卷 2092-2101页

作者： Ren, Donghao Hoellerer, Tobias Yuan, Xiaoru Univ Calif Santa Barbara Dept Comp Sci Santa Barbara CA 93106 USA Peking Univ Sch EECS Beijing Peoples R China Peking Univ Key Lab Machine Percept Minist Educ Beijing Peoples R China

We present the design, implementation and evaluation of iVisDesigner, a web-based system that enables users to design information visualizations for complex datasets interactively, without the need for textual programming. Our system achieves high interactive expressiveness through conceptual modularity, covering a broad information visualization design space. iVisDesigner supports the interactive design of interactive visualizations, such as provisioning for responsive graph layouts and different types of brushing and linking interactions. We present the system design and implementation, exemplify it through a variety of illustrative visualization designs and discuss its limitations. A performance analysis and an informal user study are presented to evaluate the system.

关键词： visualization design Interactive Design Interaction Expressiveness web-based visualization

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Experiment archive, analysis, and visualization at the National Ignition Facility

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FUSION ENGINEERING AND DESIGN 2012年第12期87卷 2087-2091页

作者： Hutton, Matthew S. Azevedo, Stephen Beeler, Richard Bettenhausen, Rita Bond, Essex Casey, Allan Liebman, Judith Marsh, Amber Pannell, Thomas Warrick, Abbie Lawrence Livermore Natl Lab Livermore CA USA

The National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory is the world's most energetic laser, providing a scientific research center to study inertial confinement fusion and matter at extreme energy densities and pressures. A target shot involves over 30 specialized diagnostics measuring critical x-ray, optical and nuclear phenomena to quantify ignition results for comparison with computational models. The Shot Analysis and visualization System (SAVI) acquires and analyzes target diagnostic data for display within a time-budget of 30 min. Laser and target diagnostic data are automatically loaded into the NIF archive database through clustered software data collection agents. The SAVI Analysis Engine distributes signal and image processing tasks to a Linux cluster where computation is performed. Intermediate results are archived at each step of the analysis pipeline. Data is archived with metadata and pedigree. Experiment results are visualized through a web-based user interface in interactive dashboards tailored to single or multiple shot perspectives. The SAVI system integrates open-source software, commercial workflow tools, relational database and messaging technologies into a service-oriented and distributed software architecture that is highly parallel, scalable, and flexible. The architecture and functionality of the SAVI system will be presented along with examples. Published by Elsevier B.V.

关键词： NIF National Ignition Facility Scientific archive web-based visualization Automated analysis Dashboards

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Topology-aware space distortion for structured visualization spaces

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INFORMATION visualization 2022年第2期21卷 166-181页

作者： Wang, Weihang Badam, Sriram Karthik Elmqvist, Niklas Univ Buffalo Buffalo NY USA Apple Inc Cupertino CA 95014 USA Univ Maryland College Pk MD 20742 USA

We propose topology-aware space distortion (TASD), a family of interactive layout techniques for non-linearly distorting geometric space based on user attention and on the structure of the visual representation. TASD seamlessly adapts the visual substrate of any visualization to give more screen real estate to important regions of the representation at the expense of less important regions. In this paper, we present a concrete TASD technique that we call ZoomHalo for interactively distorting a two-dimensional space based on a degree-of-interest (DOI) function defined for the space. Using this DOI function, ZoomHalo derives several areas of interest, computes the available space around each area in relation to other areas and the current viewport extents, and then dynamically expands (or shrinks) each area given user input. We use our prototype to evaluate the technique in two user studies, as well as showcase examples of TASD for node-link diagrams, word clouds, and geographical maps.

关键词： Topology-aware navigation zooming distortion web-based visualization user study

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visualization Mosaics for Multivariate Visual Exploration

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COMPUTER GRAPHICS FORUM 2013年第6期32卷 38-50页

作者： MacNeil, S. Elmqvist, N. Purdue Univ Sch Elect & Comp Engn W Lafayette IN 47907 USA

We present a new model for creating composite visualizations of multidimensional data sets using simple visual representations such as point charts, scatterplots and parallel coordinates as components. Each visual representation is contained in a tile, and the tiles are arranged in a mosaic of views using a space-filling slice-and-dice layout. Tiles can be created, resized, split or merged using a versatile set of interaction techniques, and the visual representation of individual tiles can also be dynamically changed to another representation. Because each tile is self-contained and independent, it can be implemented in any programming language, on any platform and using any visual representation. We also propose a formalism for expressing visualization mosaics. A web-based implementation called MosaicJS supporting multidimensional visual exploration showcases the versatility of the concept and illustrates how it can be used to integrate visualization components provided by different toolkits.

关键词： multivariate coordinated multiple views tree map hierarchical view composite visualization multidimensional web-based visualization H.5.2 [Information Interfaces and Presentation]: User Interfaces—Interaction styles I.3.6 [Computer Graphics]: Methodology and Techniques—Interaction techniques

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Metadyn View: Fast web-based viewer of free energy surfaces calculated by metadynamics

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COMPUTER PHYSICS COMMUNICATIONS 2016年 198卷 222-229页

作者： Hosek, Petr Spiwok, Vojtech Univ Chem & Technol Dept Biochem & Microbiol Tech 3 Prague 16628 6 Czech Republic

Metadynamics is a highly successful enhanced sampling technique for simulation of molecular processes and prediction of their free energy surfaces. An in-depth analysis of data obtained by this method is as important as the simulation itself. Although there are several tools to compute free energy surfaces from metadynamics data, they usually lack user friendliness and a build-in visualization part. Here we introduce Metadyn View as a fast and user friendly viewer of bias potential/free energy surfaces calculated by metadynamics in Plumed package. It is based on modern web technologies including HTML5JavaScript and Cascade Style Sheets (CSS). It can be used by visiting the web site and uploading a HILLS file. It calculates the bias potential/free energy surface on the client-side, so it can run online or offline without necessity to install additional web engines. Moreover, it includes tools for measurement of free energies and free energy differences and data/image export. Program summary Program title: Metadyn View Catalogue identifier: AEYC_v1_0 Program summary URL: http://***/summaries/AEYC_v1_*** Program obtainable from: CPC Program Library, Queen's University, Belfast, N. Ireland Licensing provisions: GPL v3.0 No. of lines in distributed program, including test data, etc.: 273269 No. of bytes in distributed program, including test data, etc.: 4632839 Distribution format: *** Programming language: HTML5, JavaScript, CSS, webGL. Computer: Any computer with a modern web browser compatible with HTML5, JavaScript and CSS. Operating system: Platform-independent. RAM: Depends on the number of Gaussian hills and dimensionality of the bias potential. Classification: 3, 7.7, 23. Nature of problem: Fast and interactive visualization of free energy surfaces of molecular systems calculated by metadynamics method. Solution method: Implementation of optimized Bias Sum algorithm and a set of tools for free energy surface analysis. Unusual features: The prog

关键词： Free energy Molecular dynamics Enhanced sampling web-based visualization

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web-based remote rendering with IBRAC - (Image-based Rendering Acceleration and Compression)

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COMPUTER GRAPHICS FORUM 2000年第3期19卷 C321-+页

作者： Yoon, I Neumann, U Univ So Calif Dept Comp Sci Integrated Media Syst Ctr Los Angeles CA 90089 USA

Recent advances in Internet and computer graphics stimulate use and development of 3D graphics on the World Wide web. To increase efficiency of systems using 3D graphics on the web, the presented method utilizes previously rendered and transmitted images to accelerate the rendering and compression of new synthetic scene images. The algorithm employs ray casting and epipolar constraints to exploit spatial and temporal coherence between the current and previously rendered images. The reprojection of color and visibility data accelerates the computation of new images. The rendering method intrinsically computes a residual image, based on a user specified error tolerance that balances image quality against computation time and bandwidth. Encoding and decoding uses the same algorithm, so the transmitted residual image consists of significant data without addresses or offsets. We measure rendering speed-ups of four to seven without visible degradation. Compression ratios per frame are a factor of two to ten better than MPEG2 in our test cases. There is no transmission of 3D scene data to delay the first image. The efficiency of the server and client generally increases with scene complexity or data size since the rendering time is predominantly a function of image size. This approach is attractive for remote rendering applications such as web-based scientific visualization where a client system may be a relatively low-performance machine and limited network bandwidth makes transmission of large 3D dat impractical.

关键词： image-based rendering compression MPEG remote-rendering web-based visualization

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