Global Illumination Techniques for the Simulation of Participating Media

Pérez, Frederic; Pueyo, Xavier; Sillion, François X.

doi:10.1007/978-3-7091-6858-5_28

Cited by 27 publications

(17 citation statements)

References 18 publications

(66 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Artists have been incorporating this phenomenon in paintings for centuries and there have been several papers concerned with its simulation in image synthesis (see, for instance, [7][8][9] and a survey is available in [10]). However, publications related to the use of effects of light scattering as a depth cue in computer vision are recent and few.…”

Section: Sparse Scene Structure From Light Scatteringmentioning

confidence: 99%

Novel depth cues from light scattering

Levesque

Deschênes

2009

Image and Vision Computing

View full text Add to dashboard Cite

Section: Sparse Scene Structure From Light Scatteringmentioning

confidence: 99%

Novel depth cues from light scattering

Levesque

Deschênes

2009

Image and Vision Computing

View full text Add to dashboard Cite

“…A physically accurate lighting simulation of such media implies solving the Radiative Transfer Equation (RTE) [Glassner 1994], which is an integro-differential equation and noticeably more complex. Different resolution strategies are surveyed in [Perez et al 1997]. Figure 10: the X-map (left), the saliency map (center) and the XS-map (right).…”

Section: Modeling Participating Mediamentioning

confidence: 99%

Efficient selective rendering of participating media

Anson

Sundstedt

Gutiérrez

et al. 2006

Proceedings of the 3rd Symposium on Applied Perception in Graphics and Visualization

View full text Add to dashboard Cite

Realistic image synthesis is the process of computing photorealistic images which are perceptually and measurably indistinguishable from real-world images. In order to obtain high fidelity rendered images it is required that the physical processes of materials and the behavior of light are accurately modelled and simulated. Most computer graphics algorithms assume that light passes freely between surfaces within an environment. However, in many applications, ranging from evaluation of exit signs in smoke filled rooms to design of efficient headlamps for foggy driving, realistic modelling of light propagation and scattering is required. The computational requirements for calculating the interaction of light with such participating media are substantial. This process can take many minutes or even hours. Many times rendering efforts are spent on computing parts of the scene that will not be perceived by the viewer. In this paper we present a novel perceptual strategy for physicallybased rendering of participating media. By using a combination of a saliency map with our new extinction map (X-map) we can significantly reduce rendering times for inhomogenous media. We also validate the visual quality of the resulting images using two objective difference metrics and a subjective psychophysical experiment. Although the average pixel errors of these metric are all less than 1%, the experiment using human observers indicate that these degradation in quality is still noticeable in certain scenes, unlike previous work has suggested.

show abstract

“…But these methods, which work well for simple scenes, are quite unapplicable in complex environments due to the huge number of equations that have to be solved yelding very expensive computing costs. In order to have a good overview of deterministic methods, you can refer to [Perez et al 1997]. …”

Section: Participating Media Simulationmentioning

confidence: 99%

“…According to [Perez et al 1997], these methods can be classified into two main categories : deterministic and stochastic methods.…”

Section: Participating Media Simulationmentioning

confidence: 99%

Photon Splatting for participating media

Boudet

Pitot

Pratmarty

et al. 2005

Proceedings of the 3rd International Conference on Computer Graphics and Interactive Techniques in Australasia and South East A

View full text Add to dashboard Cite

Since the beginning of image synthesis, much research have been done on global illumination simulation. However, simulation in participating media is still an open problem as far as computing time is concerned. Recently some methods, like Photon Mapping, proposed an optimization of the resolution of global illumination in participating media. Nevertheless, the computing costs of these methods remain very expensive.In this paper, we present a method which takes advantage of density estimation to efficiently reconstruct volume irradiance from the photon map. Our idea is to separate the computation of emission, absorption and out-scattering from the computation of in-scattering. Then we use a dual approach of density estimation to optimize this last part as it is the most computational expensive. Our method extends Photon Splatting, which optimizes the computation time of Photon Mapping for surface rendering, to participating media, and then considerably reduce participating media rendering times. Even though our method is faster than Photon Mapping for equal quality, we also propose a GPU based optimization of our algorithm.

show abstract

Global Illumination Techniques for the Simulation of Participating Media

Cited by 27 publications

References 18 publications

Novel depth cues from light scattering

Novel depth cues from light scattering

Efficient selective rendering of participating media

Photon Splatting for participating media

Contact Info

Product

Resources

About