Multiple light field rendering

Linden, Jarno van der

doi:10.1145/604471.604510

Cited by 1 publication

(1 citation statement)

References 11 publications

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“…Many previous methods have used light fields for rendering [Gortler et al 1996;Levoy and Hanrahan 1996;Isaksen et al 2000;Chen et al 2002;van der Linden 2003;Stewart et al 2003]. The shape of occlusion light fields has been studied [Durand 1999], as well as how to capture occlusion light fields [Lanman et al 2008].…”

Section: Frequency Analysis and Reconstruction Methods Oftenmentioning

confidence: 99%

Frequency analysis and sheared filtering for shadow light fields of complex occluders

Egan

Hecht

Durand³

et al. 2011

ACM Trans. Graph.

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ray tracing of soft shadows produced by area lighting and intricate geometries, such as the shadows through plant leaves or arrays of blockers, is a critical challenge. The final image often has relatively smooth shadow patterns, since it integrates over the light source. However, Monte Carlo rendering exhibits considerable noise even at high sample counts because of the large variance of the integrand due to the intricate shadow function. This article develops an efficient diffuse soft shadow technique for mid to far occluders that relies on a new 4D cache and sheared reconstruction filter. For this, we first derive a frequency analysis of shadows for planar area lights and complex occluders. Our analysis subsumes convolution soft shadows for parallel planes as a special case. It allows us to derive 4D sheared filters that enable lower sampling rates for soft shadows. While previous sheared-reconstruction techniques were able primarily to index samples according to screen position, we need to perform reconstruction at surface receiver points that integrate over vastly different shapes in the

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