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Visual quality of the ground in 3D models: using color-coded images to blend aerial photos with tiled detail-textures

Mattias Roupé (Institutionen för bygg- och miljöteknik, Construction Management) ; Mikael Johansson (Institutionen för bygg- och miljöteknik, Construction Management)
Proceedings of the 6th International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa p. 73-79. (2009)
[Konferensbidrag, refereegranskat]

In interactive 3D-environments of urban-planning projects, the ground materials and land features are often represented by aerial photos. These lack of detail and therefore often look blurred and diffuse. This paper presents a technique to enhance the visual quality of the ground by blending the aerial photos with tiled detail-textures in a level-of-detail integrated system that is controlled by color-coded images. The color-coded images are created by extracting land features such as grass, asphalt, rock and water from the aerial photos or 2D CAD-drawings. The effects of different resolutions of the aerial photo and color-coded image are presented and discussed. To evaluate this approach, the technique was tested on a simple rendering performance scene and on two sub-sets of the 3D-city model of Göteborg, namely a landscape and an urban data set. The visual quality and rendering speed of the 3D model were positive and are presented in several images and table.

Nyckelord: Computer Graphics, detail-textures, color-coded image, material blending, texture splatting, Virtual Reality, 3D City modeling

Denna post skapades 2009-11-12. Senast ändrad 2017-06-28.
CPL Pubid: 101564