Key technologies for online visualization of large-scale underground space

LIU Xiao-jun; ZHANG Dong-pei; XIE Ning; JIA Jin-yuan

doi:10.3788/OPE.20152303.0895

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Key technologies for online visualization of large-scale underground space

更新时间：2020-08-13

- Key technologies for online visualization of large-scale underground space
- Optics and Precision Engineering Vol. 23, Issue 3, Pages: 895-903(2015)
- 作者机构：
  
  同济大学软件学院上海,201804
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20152303.0895
  CLC： TP391.9
- Received：18 November 2014，
  
  Revised：31 December 2014，
  
  Published：25 March 2015
- 稿件说明：
移动端阅览
刘小军, 张东培, 谢宁等. 大规模地下空间在线展示关键技术[J]. 光学精密工程, 2015,23(3): 895-903

LIU Xiao-jun, ZHANG Dong-pei, XIE Ning etc. Key technologies for online visualization of large-scale underground space[J]. Editorial Office of Optics and Precision Engineering, 2015,23(3): 895-903
刘小军, 张东培, 谢宁等. 大规模地下空间在线展示关键技术[J]. 光学精密工程, 2015,23(3): 895-903 DOI： 10.3788/OPE.20152303.0895.

LIU Xiao-jun, ZHANG Dong-pei, XIE Ning etc. Key technologies for online visualization of large-scale underground space[J]. Editorial Office of Optics and Precision Engineering, 2015,23(3): 895-903 DOI： 10.3788/OPE.20152303.0895.

摘要

简述了通过网页3D来分享信息及进行3D交互的相关技术。针对大规模的地下空间场景以及对该场景进行网页实时展示的需求

提出了一套基于互联网进行大规模地下空间实时展示的轻量级场景管理机制。首先

对地下空间场景数据进行轻量化预处理

构建轻量级场景管理结构。然后

根据场景数据特点提出相应的场景管理策略

即基于兴趣区域的室外场景管理策略和基于入口的室内场景管理策略。通过视点位置驱动实现室内外场景切换

并自动选择管理策略

达到在网页上进行远程实时漫游大规模地下空间场景的效果。实验表明:该方法能大幅度剔除不必要的场景数据

提高资源利用率

满足在线展示大规模地下空间场景的需求。由于网页应用具有跨平台优势

提出的系统支持用户跨平台对大规模地下空间场景进行实时漫游与操控。

Abstract

The corresponding technologies for sharing information and 3D interaction by Web3D were described briefly. An efficient scene management scheme for real-time visualization of a large-scale underground scene was proposed to meet its demands for webpage visualization. Firstly

the raw data from the underground scene were preprocessed in lightweight

and a shell structure-aware scene analysis algorithm was employed for constructing a scene management structure. Then

some strategies were put forward according to the characteristics of the underground scene data

and those are a SOI-ExteriorShell strategy based on Sector Of Interest (SOI) management for outdoor scenes and a Portal-InteriorShell strategy supporting progressive loading for indoor ones. With the switch between indoor and outdoor scenes

the method dynamically chooses the corresponding strategy and makes it possible to roam in the large-scale underground scene online. From the final experiment

it concludes that the proposed method efficiently culls unnecessary scenes in a greatly large extent and is capable of meeting the requirements for real-time visualization of the large-scale underground scene over Internet. As the webpage has an advantage of cross-platform

the system supports users to roam and control the large-scale underground scene under cross-platform.

关键词

Keywords

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