Abstract
Realistic rendering of outdoor terrain requires both that the geometry of the environment be modeled accurately and that appropriate texturing be 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 (grayscale) 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.
Keywords
- Snow Cover
- Digital Elevation Model
- United States Geological Survey
- Snow Water Equivalent
- Snow Accumulation
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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References
Aerial-Images, Inc. http://www.aerial-images.com. 615 Hillsborough Street, Raleigh, NC 27603, USA.
Barry, R. G. Mountain Weather and Climate. Methuen, London, UK, 1981.
Brivio, P. A., Furini, P., Righetti, M., AND Marini, D. Synthesis of multispectral images of natural landscape. In Eurographics Workshop on Rendering (1991).
Brooks, M. J., AND Horn, B. K. P. Shape and source from shading. In Shape from Shading, B. K. P. Horn and M. J. Brooks, Eds. MIT Press, Cambridge, MA, 1989.
Cline, D., AND Egbert, P. Interactive display of very large textures. In Proceedings of IEEE Visualization’ 98 (Oct. 1998), pp. 343–350.
Ferguson, R., AND Morris, E. Snowmelt modelling in the Cairngorms. Earth Sci., 78 (1987), 261–267.
Fowler, R. J., AND Little, J. J. Automatic extraction of irregular network digital terrain models. In SIGGRAPH 79 Conference Proceedings (1979), Annual Conference Series, ACM SIGGRAPH, pp. 207–218.
Gardner, G. Y. Simulation of natural scenes using textured quadric surfaces. In Computer Graphics (SIGGRAPH’ 84 Proceedings) (July 1984), H. Christiansen, Ed., vol. 18, pp. 11–20.
Gray, D. M., AND Male, D. H., Eds. Handbook of Snow. Pergamon Press, 1981.
Hoppe, H., DeRose, T., Duchamp, T., McDonald, J., AND Stuetzle, W. Mesh optimization. In Computer Graphics (SIGGRAPH’ 93 Proceedings) (Aug. 1993), J. T. Kajiya, Ed., vol. 27, pp. 19–26.
Hoppe, H. H. Smooth view-dependent level-of-detail control and its application to terrain rendering. In Proceedings of IEEE Visualization’ 98 (Oct. 1998), pp. 343–350.
Kajiya, J. T. The rendering equation. In Computer Graphics (SIGGRAPH’ 86 Proceedings) (Aug. 1986), D. C. Evans and R. J. Athay, Eds., vol. 20, pp. 143–150.
Kelly Elder, J. D., AND Michaelsen, J. Snow accumulation and distribution in an alpine watershed. Water Resources Research 27,7 (1991), 1541–1552.
K.O. Eggleston, E. I., AND Riley, J. Hybrid computer simulation of the accumulation and melt processes in a snowpack. Technical Report PRWG65-1, Utah State University, Logan, UT, USA, 1971.
Leemans, R., AND Cramer, W. The HASA climate database for mean monthly values of temperature, precipitation and cloudiness on a terrestrial grid, 1991. RR-91-18, HASA, Laxenburg.
Oliver Deussen, Pat Hanrahan, Bernd Linterman, Radomir Měch, Matt Pharr AND Przemyslav Prusinkiewicz. Realistic modeling and rendering of plant ecosystems. In SIGGRAPH 98 Conference Proceedings (July 1998), pp. 275–286.
Pope, C. N., Vuong, M., Moore, R. G., AND Cowser, S. S. A whole new CCTT world. Military Simulation and Training, 5 (1995).
Preetham, A. J., Shirley, P., AND Smits, B. A practical analytic model for daylight. In SIGGRAPH (1999). To Appear.
Rohrer, M. Determination of transition air temperature from snow to rain and intensity of precipitation. In WMO IASH ETH International Workshop on Precipitation Measurement (Oct. 1989), pp. 475–582.
SPOT Image Corporation. http://www.spot.com. 1897 Preston White Drive, Reston, VA 20191, USA.
Swift, L. W. Algorithm for solar radiation on mountain slopes. Water Resources Research 72,1 (1976), 108–112.
Tou, J. T., AND Gonzalez, R. C. Pattern Recognition Principles. Addison-Wesley, Reading, MA, 1974.
U.S. Geological Survey. Standards for digital orthophotos, December 1996.
U.S. Geological Survey. Standards for digital elevation models, January 1998.
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Premože, S., Thompson, W.B., Shirley, P. (1999). Geospecific rendering of alpine terrain. In: Lischinski, D., Larson, G.W. (eds) Rendering Techniques’ 99. EGSR 1999. Eurographics. Springer, Vienna. https://doi.org/10.1007/978-3-7091-6809-7_11
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DOI: https://doi.org/10.1007/978-3-7091-6809-7_11
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