Abstract:
This thesis deals with the modeling and the interactive streaming of large natural 3D scenes. We aim at providing techniques to allow the remote walkthrough of users in a natural 3D scene ensuring botanical coherency and interactivity.
First, we provide a compact and progressive representation for botanically realistic plant models. The topological structure and the geometry of the plants are represented by generalized cylinders. We provide a multiresolution compression scheme, based on standardization and instantiation, on difference-based decorrelation, and on entropy coding.
Then, we study efficient transmission of these 3D objects. The proposed packetization scheme works for any multiresolution 3D representation. We validate our packetization scheme with extensive experiments over a WAN (Wide Area Network), with and without congestion control (Datagram Congestion Control Protocol).
Finally, we address issues on streaming at the scene-level. We optimize the viewpoint culling requests on server-side by providing an adapted datastructure and we prepare the ground for our further work on scalability and deployment of distributed 3D streaming systems.
Keywords:
Streaming, Plant models, Multiresolution, Progressive coding, Progressive transmission, Networked Virtual Environment
Versions:
- The official PDF book:
administrative stuff + abstracts + content + acknowledgements + big French summary.
(176 pages, 7.0MB).
- The thesis HTML version:
uses complex CSS, OK on Firefox, Safari and Chrome, but not with Internet Explorer.
- The thesis Director's Cut version:
lighter for printing; only the thesis content, two columns, smaller font, no white pages …
(49 pages, 5.9MB).
Sebastien Mondet, Fri, 17 Jul 2009 16:53:22 +0200