22 March 2005 Real-time stereo imaging of gaseous phenomena
Author Affiliations +
Proceedings Volume 5664, Stereoscopic Displays and Virtual Reality Systems XII; (2005); doi: 10.1117/12.584586
Event: Electronic Imaging 2005, 2005, San Jose, California, United States
Abstract
Gaseous phenomena such as clouds, fog, and mist have been difficult to render in realistic monoscopic imaging environments. Such phenomena are transparent, cast shadows, have dynamic behavior, and are of variable density. This paper describes a method based on splatting, billboarding, and alpha-blending that works well in a realistic real-time stereo imaging environment. Splatting is used to reconstruct a discretely sampled 3D volume to produce a 2D image with appropriate density. Efficient reconstruction is gained through the use of texture-mapped billboards whose transparencies are determined by a Gaussian reconstruction kernel. To achieve the fastest rendering, it is possible to orient all billboards to face the viewplane rather than the viewpoint. The parallax error introduced by this approach is analyzed. The authors give examples to illustrate how the number, position, and size of the billboards in a scene can be used to create different effects. The discussion does not treat the problems of self-shadowing or dynamic behavior although the approach could be used as the basis for simulating both.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tyler M. Johnson, David F. McAllister, "Real-time stereo imaging of gaseous phenomena", Proc. SPIE 5664, Stereoscopic Displays and Virtual Reality Systems XII, (22 March 2005); doi: 10.1117/12.584586; https://doi.org/10.1117/12.584586
PROCEEDINGS
12 PAGES


SHARE
KEYWORDS
Particles

Volume rendering

Clouds

Eye

Opacity

Error analysis

Cameras

Back to Top