Visual quality of the ground in 3D models: using color-coded images to blend aerial photos with tiled detail-textures
Paper in 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, Civil and Environmental Engineering, Construction Management

Mikael Johansson

Chalmers, Civil and Environmental Engineering, Construction Management

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

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

Subject Categories

Other Computer and Information Science

Software Engineering



More information