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Visualizing, Analyzing and Constructing L-System from Arborized 3d Model Using a web Application

Visualizing, Analyzing and Constructing L-System from Arbori...

引用

17th international Joint conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2024

作者： Nielen, Nick van Verbeek, Fons Cao, Lu Leiden Institute of Advanced Computer Science Leiden University Leiden Netherlands

In biology, arborized structures are well represented and typically complex for visualization and analysis. In order to have a profound understanding of the topology of arborized 3d biological model, higher level abstraction is needed. We aim at constructing an abstraction of arborized 3d biological model to an L-system that provides a generalized formalization in a grammar to represent complex structures. the focus of this paper is to combine 3d visualization, analysis and L-system abstraction into a single web application. We designed a front-end user interface and a back-end. In the front-end, we used A-Frame and defined algorithms to generate and visualize L-systems. In the back-end, we utilized the Vascular Modelling Toolkit’s (VMTK) centerline analysis methods to extract important features from the arborized 3d models, which can be applied to L-system generation. In addition, two 3d biological models: lactiferous duct and artery are used as two case studies to verify the functionality of this web application. In conclusion, our web application is able to visualize, analyse and create L-system abstractions of arborized 3d models. this in turn provides workflow-improving benefits, easy accessibility and extensibility. © 2024 by SCITEPRESS–Science and technology Publications, Lda.

关键词： Abstracting

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MetaScene: A Novel Metaverse large-scale 3d Scene Rendering Framework 17

MetaScene: A Novel Metaverse large-scale 3D Scene Rendering ...

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17th IEEE international conference on Social Computing and Networking, SocialCom 2024

作者： Chang, Qingling Meng, Xiaofei Hong, Zhiyong Xu, Shiting Wuyi University Institute of China-Germany Artificial Intelligence Jiangmen China Wuyi University School of Electronics and Information Engineering Jiangmen China Zhuhai 4Dage Network Technology Zhuhai China

ISBN: (纸本)9798331521097

We are excited to introduce MetaScene, a ground-breaking framework for rendering Metaverse's large-scale virtual 3d scenes that is versatile and lightweight. Previous construction solutions relied heavily on direct loading and rendering of 3d detailed models. However, our approach is simply to load a 3d simplified model and a live video stream projected onto the model. the 3d simplified model is derived from the 3d fine model, contains only the necessary bite, and the amount of data is much smaller. Real-time video streams are encoded with images rendered by a 3d fine model, and then the video stream is decoded and projected onto a 3d simplified model. Our MetaScene framework is so efficient that it can handle scenes of infinite scale, rendering quality on web pages is comparable to Unreal Engine (e.g. UE5), and can deliver photo-grade images. MetaScene supports cross-platform, such as web browsers, PC apps, mobile apps, and more. It also allows multiple users to interact seamlessly in virtual 3d scenes. And can be extended to any virtual 3d scene application. We have verified the data usage of multi-client parallel access through a large number of experiments, and our model can match or even exceed the UE5 framework in terms of FPS and bandwidth usage. © 2024 IEEE.

关键词： Rendering (computer graphics)

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A Practical Approach to Integrating Live 2d web Content with the Immersive web 19

A Practical Approach to Integrating Live 2D Web Content with...

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24th ACM international conference on 3d web technology (web3d)

作者： Speiginer, Gheric Macintyre, Blair Georgia Inst Technol Atlanta GA 30332 USA Mozilla Mountain View CA USA

ISBN: (纸本)9781450367981

As 3d on the web gains momentum via standards such as webGL and webXR, a reoccurring frustration among web developers is inability to leverage 2d web technologies within immersive presentation contexts. the use-cases for blending 2d and 3d web content include progressive enhancement of 2d web pages, re-use of existing 2d web content, and layout/design of complex interactive user interfaces for 3d environments. We introduce webLayer3d, a JavaScript plugin for *** (a popular 3d scene-graph library) that makes it easy for web developers to integrate live interactive 2d web content (built using standard web technologies) into a 3d scene (rendered using webGL). In this paper, we demonstrate that existing dOM-to-Texture techniques (when used thoughtfully) are sufficient for enabling a performant, flexible, and simple approach to building interactive 3d user interfaces for the immersive web.

关键词： web standards rasterization 3d user interfaces webxr webgl

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design and Analysis of a System to Read Braille with Remote Cloud Architecture 17

Design and Analysis of a System to Read Braille with Remote ...

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17th IEEE India Council international conference, INdICON 2020

作者： Krishna Virinchi, Rao Antony, Paulson K Saravanan, Shreyaa dhakshain Balaji, V Suresh Krishnan, Vaishnavi Susanna Andrews, Edith Joy Kokkat, Chris Melvin Noel, S Sreejeeth Vijay, T.K. Goyal, Harshit Vijayalakshmi, C. Vellore Institute of Technology Chennai School of Computer Science and Engineering Chennai India Central University of Tamil Nadu Thiruvarur India

ISBN: (纸本)9781728169163

Recognizing that physical Braille books have a high cost of production and purchase, using a refreshable Braille display is a viable solution. this paper discusses the design and architecture of a system which grants the visually impaired access to a number of books on a refreshable Braille display by using the huge number of existing e-books. Understanding that almost all the books that are available to a person who isn't visually impaired, the design described in the paper takes e-books and converts them into Braille that is directly rendered on the refreshable Braille display's interface with solenoid based actuation, thus eliminating the extra costs incurred in producing and purchasing specially printed Braille books. the design describes a 3d printable physical device which uses a NodeMCU for its computation and has internet connectivity to utilize the support of a web app and cloud servers whose architecture and functionalities are also discussed. © 2020 IEEE.

关键词： 3d printers

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3d printing as a research domain: mapping the main areas of knowledge 17

3D printing as a research domain: mapping the main areas of ...

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17th international conference of the international-Society-for-Scientometrics-and-Informetrics (ISSI) on Scientometrics and Informetrics

作者： Galina, Andreia Cristina Leta, Jacqueline Univ Fed Rio de Janeiro Av Brigadeiro Trompowisky S-NPredio CCSBloco B BR-21941590 Rio De Janeiro Brazil

ISBN: (纸本)9788833811185

the 3d printing is an emerging technology whose principle is to deposit material in thin layers until the piece takes on the projected shape. 3d printing has the potential to change society as well as some scientific fields. Hence, considering this last aspect, the present paper aims to map the most prevalent research areas in 3d printing domain during the 1983-2017 period analyzed. A total of 119,800 documents on 3d printing were collected from web of Science and Scopus. Results show that the number of documents on 3d printing increased 13.65%, when considering Scopus and web of Science together. the areas with the highest ratio of 3d printing documents are engineering, computing and materials science. the analysis of keywords co-occurrence and field trends of magazines and conferences revealed also a close linkage between 3d printing and health sciences, where the concepts of bio-ink, bioprint and bioplotter are introduced. these results reinforce the role of 3d printing as a research domain that is been structured upon different areas.

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A Multi-site Collaborative Sampling for web Accessibility Evaluation 17th

A Multi-site Collaborative Sampling for Web Accessibility Ev...

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17th international conference on Computers Helping People with Special Needs (ICCHP)

作者： Yu, Zhi Bu, Jiajun Shen, Chao Wang, Wei dai, Lianjun Zhou, Qin Zhao, Chuanwu Zhejiang Univ Coll Comp Sci Zhejiang Prov Key Lab Serv Robot Hangzhou Peoples R China Alibaba Zhejiang Univ Joint Inst Frontier Technol Hangzhou Peoples R China Zhejiang Univ Ningbo Res Inst Ningbo Peoples R China China Disabled Persons Federat Informat Ctr Beijing Peoples R China Zhejiang Toman Intelligent Mfg Technol Co Ltd Xinchang Peoples R China

ISBN: (纸本)9783030587956;9783030587963

Many sampling methods have been used for web accessibility evaluation. However, due to the difficulty of web page feature extraction and the lack of unsupervised clustering algorithm, the result is not very good. How to optimize the manual workload of different websites under the premise of ensuring that the overall manual workload remains the same during multi-site collaborative sampling is an important issue at present. To resolve the above problems, we propose a multi-site collaborative sampling method to obtain the final sampling result of each website. the effectiveness of the two sampling methods proposed in this paper is proved by experiments on real website datasets.

关键词： Information accessibility Accessibility evaluation Sampling method Active learning Semi-supervised clustering

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vFireVI: 3d Virtual Interface for vFire 17th

vFireVI: 3D Virtual Interface for vFire

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17th international conference on Information technology: New Generations, ITNG 2020

作者： Lewis, Christopher Quijada, Ronn Siedrik Harris, Frederick C. Computer Science and Engineering University of Nevada Reno RenoNV United States

ISBN: (纸本)9783030430191

Wildfires cause severe amounts of damage to wildlife habitats and property. the most successful way of escaping safely or quelling a fire is to do so with communication, and as a group. While there are several other wildfire simulators, visualization and multi-user components are lacking or non-existent in most of them. vFireVI aims to provide a safe and accurate virtual environment for simulation and interaction with wildfires through multi-user collaboration, accurate terrain, and realistic fire spread. In order to do this, an interface was built between vFireVI and an earlier project, vFireLib, to allow transmission of simulation data back and forth. Combining these two allows for an intuitive user interface, responsive multiplayer, quick server communication, and rapid simulations. All of this is done in virtual reality to provide a meaningful and immersive experience, where users can collaborate and test each other. © Springer Nature Switzerland AG 2020.

关键词： Fires

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17th international conference on web-based Learning, ICWL 2018

17th International Conference on Web-based Learning, ICWL 20...

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17th international conference on web-based Learning, ICWL 2018

ISBN: (纸本)9783319965642

the proceedings contain 15 papers. the special focus in this conference is on web-based Learning. the topics include: Making Understandable Game Learning Analytics for Teachers;authoring Adaptive digital Computational thinking Lessons Using vTutor for web-Based Learning;effects of Introducing a Game-Based Student Response System into a Flipped, Person-Centered Classroom on Object-Oriented design;a Semantic Graph-Based Japanese Vocabulary Learning Game;support for Overcoming Pedagogical Issues in Primary School Tablet-Based Classroom Environments;a Badge for Reducing Open Answers in Peer Assessment;leverage the Learning Behaviour of Students in Online Courses with Personalised Interventions;technology Enhanced Learning for Senior Citizens;a Study of Students’ Conception of Problem Situations: Using Conceptualization in Scenario-Based Learning;investigating Users’ decision-Making Process While Searching Online and their Shortcuts Towards Understanding;an Augmented Reality Framework for Gamified Learning;A Collaborative STEM Project with Educational Mobile Robot on Escaping the Maze: Prototype design and Evaluation;collaborative Non-linear Storytelling Around 3d Objects.

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Securing Spatial data Infrastructures in the Context of Smart Cities 17

Securing Spatial Data Infrastructures in the Context of Smar...

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17th international conference on Cyberworlds (CW)

作者： Chaturvedi, Kanishk Matheus, Andreas Nguyen, Son H. Kolbe, thomas H. Tech Univ Munich Chair Geoinformat Munich Germany Secure Dimens GmbH Munich Germany

ISBN: (纸本)9781538673157

Spatial data Infrastructures play a very important role in linking and integrating various distributed systems in smart city applications. One such concept called Smart district data Infrastructure (SddI) is already being implemented in different districts of European cities, which allows managing various actors, stakeholders, sensors, simulation tools and semantic 3d city models within one common operational framework. Such distributed systems involve open data sources belonging to different platforms. On the other side, there are various users and applications who want to access and work on all these systems in convenient ways using single sign-on. If not secured, it may cause a major threat to disclose sensitive information to untrusted or unauthorized entities. this paper presents a novel implementation approach of securing distributed components of the SddI in the district Queen Elizabeth Olympic Park in London. It establishes proper authorization and authentication to allow privacy, security and controlled access to all stakeholders and the respective components. the implementation combines the use of state-of-the-art concepts such as OAuth2 access tokens, OpenId Connect user claims and Security Assertion Markup Language (SAML) based Single-Sign-On (SSO) authentication.

关键词： Smart Cities SddI Sensors SAML OAuth2 Single-Sign-On CityGML OGC web Services

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web3d Online Virtual Education Platform for Touring Huangyangjie Battlefield Scenario Over Internet 10th

Web3D Online Virtual Education Platform for Touring Huangyan...

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10th international conference on E-Learning and Games (Edutainment)

作者： Liu, Chang Jia, Jinyuan Ge, Yibo Xie, Ning Tongji Univ Sch Software Engn Shanghai 201804 Peoples R China

ISBN: (纸本)9783319402598;9783319402581

this paper explores how the reconstruction of special history scenario will be applied in online education. After investigating various virtual reality techniques including design of virtual educational system, reconstruction of virtual scene, management of scene, AI, lightweighting for 3d model and light shadow rendering, we build an online education platform for touring a web3d virtual battlefield scenario called Huangyangjie in China. We firstly present the solution and scheme for rebuilding the web 3d battlefield Scenario using lightweight 3d models. Secondly, we present voxel of interesting (VOI) scene management strategy based terrain-voxel-model uniform structure. Finally, we optimize A* algorithm in AI management process and present Parallel-Split Variance Shadow Mapping (PSVSM) algorithm based on sparse voxelization in real-time web-based rendering.

关键词： Virtual reality Virtual education Scene management Light weight 3d model Shadow mapping

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