Geospecific rendering of alpine terrain

Geospecific rendering of alpine terrain

Simon Premoze
Computer Science Department
University of Utah

William B. Thompson
Computer Science Department
University of Utah

Peter Shirley
Computer Science Department
University of Utah

Abstract

Realistic rendering of outdoor terrain requires both that the geometry of environment be modeled accurately and that appropriate texturing by laid down on top of that geometry. While elevation data is widely available for much of the world and many methods exist for converting this data to forms suitable for graphics systems, we have much less experience with patterning the resulting surface. This paper describes an approach for using panchromatic aerial imagery to produce color views of alpine scenes. The method is able to remove shading and shadowing effects in the original image so that shading and shadowing appropriate to variable times of day can be added. Seasonal snow cover can be added in a physically plausible manner. Finally, 3-D instancing of trees and brush can be added in locations consistent with the imagery, significantly improving the visual quality.

A gzipped postscript version of the paper is available here.

A pdf version of the paper is available here.




Last modified: Mon Feb 1 16:19:28 MST 1999