Publications in Scientific Journals:
R. Habel, B. Mustata, M. Wimmer:
"Efficient Spherical Harmonics Lighting with the Preetham Skylight Model";
Eurographics - (STARs) (Cultural Heritage) (Short Papers),
We present a fast and compact representation of a skylight model for spherical harmonics lighting, especially for outdoor scenes. This representation allows dynamically changing the sun position and weather conditions on a per frame basis. We chose the most used model in real-time graphics, the Preetham skylight model, because it can deliver both realistic colors and dynamic range and its extension into spherical harmonics can be used to realistically light a scene. We separate the parameters of the Preetham skylight models' spherical harmonics extension and perform a polynomial two-dimensional non-linear least squares fit for the principal parameters to achieve both negligible memory and computation costs. Additionally, we execute a domain specific Gibbs phenomena suppression to remove ringing artifacts.
Electronic version of the publication:
Project Head Michael Wimmer:
Realistische Echtzeitbeleuchtungssimulation von Bäumen
Created from the Publication Database of the Vienna University of Technology.