Visual quality of the ground in 3D models: using color-coded images to blend aerial photos with tiled detail-textures
Paper i proceeding, 2009

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.

Virtual Reality

color-coded image

3D City modeling

texture splatting

material blending


Computer Graphics


Mattias Roupé

Chalmers, Bygg- och miljöteknik, Construction Management

Mikael Johansson

Chalmers, Bygg- och miljöteknik, Construction Management

Proceedings of the 6th International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa

978-1-60558-428-7 (ISBN)


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