Progressive streaming and rendering of 3D terrain for cyber city visualization

Fuan Tsai, Hau Shiung Liu, Jim Kim Liu, Kuo Hsing Hsiao

研究成果: 書貢獻/報告類型會議論文篇章同行評審

4 引文 斯高帕斯(Scopus)

摘要

Cyber city is a system that allows users to inquire about real world information quickly and conveniently on the internet. Terrain is one of the most important factors in the rendering of virtual scenes regarding cyber city visualization. For large-area and detailed representations of digital terrain models, rendering in real-time will be difficult because of the large data volume. It is also difficult to smoothly and efficiently broadcast virtual environments in large-scale web applications. To address these issues, this paper presents an efficient technique to progressively transmit and smoothly rebuild cyber city terrain models for internet-based geoinformatic applications. The full terrain was divided into regular tiles to stream adaptively. Different levels of detail of tiles were created and saved in the serve end and transmitted to clients according to different visualization conditions. The first task for progressive transmission was to transmit the base terrain data. Secondly, the LOD of each visible tile was determined based on viewing parameters in real time. Detail vectors describing changes of the LOD for each tile were then constructed and sent to the client to modify the developed mesh representation of the terrain. Algorithms for the decomposition and reconstruction of subdivision surfaces of tiles were also developed to update each tile as view-dependent parameters changed, so the clients could have smooth scene rendering. With this technique, users can reconstruct smooth approximations of the original scenes adaptively from a rather small amount of data received on the internet to increase the efficiency of terrain rendering in cyber city visualization.

原文???core.languages.en_GB???
主出版物標題Asian Association on Remote Sensing - 27th Asian Conference on Remote Sensing, ACRS 2006
頁面41-46
頁數6
出版狀態已出版 - 2006
事件27th Asian Conference on Remote Sensing, ACRS 2006 - Ulaanbaatar, Mongolia
持續時間: 9 10月 200613 10月 2006

出版系列

名字Asian Association on Remote Sensing - 27th Asian Conference on Remote Sensing, ACRS 2006

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???event.eventtypes.event.conference???27th Asian Conference on Remote Sensing, ACRS 2006
國家/地區Mongolia
城市Ulaanbaatar
期間9/10/0613/10/06

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