Interactive volumetric lighting simulating scattering and shadowing

In this paper we present a volumetric lighting model, which simulates scattering as well as shadowing in order to generate high quality volume renderings. By approximating light transport in inhomogeneous participating media, we are able to come up with an efficient GPU implementation, in order to achieve the desired effects at interactive frame rates. Moreover, in many cases the frame rates are even higher as those achieved with conventional gradientbased shading. To evaluate the impact of the proposed illumination model on the spatial comprehension of volumetric objects, we have conducted a user study, in which the participants had to perform depth perception tasks. The results of this study show, that depth perception is significantly improved when comparing our illumination model to conventional gradient-based volume shading. Additionally, since our volumetric illumination model is not based on gradient calculation, it is also less sensitive to noise and therefore also applicable ...

• Type: Conference
• Year: 2010
• Where: APVIS
• Authors: Timo Ropinski, Christian Döring, Christof Rezk-Salama
• Keywords: APVIS 2010, Frame Rates, Illumination Model, Information Technology, Volumetric Lighting Model