Three dimensional Terrain modeling and display for environmental assessment

ABSTRACT

A technique for compositing computer generated images of buildings and background images created from aerial photographs is described. The aerial photo data are mapped onto a terrain model based on cartographic data. The technique can be used to pre-evaluate visual impact of large scale construction by means of not only still images but also animations.The technique can be briefly described as follows: 1) an accurate, three-dimensional terrain model is created based on cartographic data. 2) a hierarchy of aerial photo data at various resolutions is mapped onto the terrain model as a texture. 3) the height of trees is taken into account in regions near the viewpoint. 4) allowing intersections of terrain models with constructions facilitates geometric adjustments and shadowing.

REFERENCES

• 1: Agui, T., Miyata, K., and Nakajima, M. A Reconstructing Method of 3D Mountainous Shapes from Contours. Trans. IEICE J69-D, 12 (1986), 1905-1912, (in Japanese).
• 2: H. N. Christiansen , T. W. Sederberg, Conversion of complex contour line definitions into polygonal element mosaics, ACM SIGGRAPH Computer Graphics, v.12 n.3, p.187-192, August 1978
• 3: Franklin C. Crow, Shadow algorithms for computer graphics, ACM SIGGRAPH Computer Graphics, v.11 n.2, p.242-248, Summer 1977
• 4: Eliot A. Feibush , Marc Levoy , Robert L. Cook, Synthetic texturing using digital filters, ACM SIGGRAPH Computer Graphics, v.14 n.3, p.294-301, July 1980
• 5: Geoffrey Y. Gardner, Simulation of natural scenes using textured quadric surfaces, ACM SIGGRAPH Computer Graphics, v.18 n.3, p.11-20, July 1984
• 6: Jet Propulsion Laboratory. Finale L. A.-- The Movie. SIGGRAPH '87 Film and Video Show (1987).
• 7: Robert Marshall , Rodger Wilson , Wayne Carlson, Procedure models for generating three-dimensional terrain, ACM SIGGRAPH Computer Graphics, v.14 n.3, p.154-162, July 1980
• 8: Gavin S P Miller, The definition and rendering of terrain maps, ACM SIGGRAPH Computer Graphics, v.20 n.4, p.39-48, Aug. 1986
• 9: Eihachiro Nakamae , Koichi Harada , Takao Ishizaki , Tomoyuki Nishita, A montage method: the overlaying of the computer generated images onto a background photograph, ACM SIGGRAPH Computer Graphics, v.20 n.4, p.207-214, Aug. 1986
• 10: Eihachiro Nakamae , Takao Ishizaki , Tomoyuki Nishita , Shinichi Takita, Compositing 3D Images with Antialiasing and Various Shading Effects, IEEE Computer Graphics and Applications, v.9 n.2, p.21-29, March 1989 [doi>10.1109/38.19048]
• 11: Tomoyuki Nishita , Isao Okamura , Eihachiro Nakamae, Shading models for point and linear sources, ACM Transactions on Graphics (TOG), v.4 n.2, p.124-146, April 1985 [doi>10.1145/282918.282938]
• 12: G. Petrie , T. J. M. Kennie, Terrain modelling in surveying and civil engineering, Computer-Aided Design, v.19 n.4, p.171-187, May 1987 [doi>10.1016/0010-4485(87)90066-2]
• 13: Thomas Porter , Tom Duff, Compositing digital images, ACM SIGGRAPH Computer Graphics, v.18 n.3, p.253-259, July 1984
• 14: Rougelot, R.. S. The General Electric Computed Color TV Display. Proceedings of the Second University of illinois Conference on Computer Graphics. in Part,neat Concepts in Computer Graphics. eds. Faiman, M. and Nievergelt, J. University of Illinois Press (1969), 261- 281.
• 15: Sakae Uno , Hideo Matsuka, A general purpose graphic system for computer aided design, ACM SIGGRAPH Computer Graphics, v.13 n.2, p.25-32, August 1979
• 16: Lance Williams, Pyramidal parametrics, ACM SIGGRAPH Computer Graphics, v.17 n.3, p.1-11, July 1983

INDEX TERMS

Primary Classification:
  I. Computing Methodologies
  I.3 COMPUTER GRAPHICS
      I.3.7 Three-Dimensional Graphics and Realism
          Subjects: Visible line/surface algorithms

Additional Classification:
  I. Computing Methodologies
  I.3 COMPUTER GRAPHICS
      I.3.7 Three-Dimensional Graphics and Realism
          Subjects: Color, shading, shadowing, and texture

General Terms:
Algorithms