Subsurface scattering approximation methods and apparatus

Details Subsurface scattering approximation methods and apparatus Subsurface scattering approximation methods and apparatus

2008-03-25

2008-03-25

Zimmerman, Mark (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Three-dimension

Reexamination Certificate

active

10810064

ABSTRACT:
A method for determining illumination of surface points of an object in a scene from lighting sources includes determining a first thickness map for a first lighting source for the scene, wherein the first thickness map includes a first plurality of thickness values of the object with respect to distance from the first lighting source, determining a surface point on the object, determining a first plurality of thickness values associated with the surface point on the object in response to the first thickness map, determining a first filtered thickness value associated with the surface point on the object in response to the first plurality of thickness values, and determining an illumination contribution from the first lighting source at the surface point in response to the first filtered thickness value.

REFERENCES:
patent: 5742749 (1998-04-01), Foran et al.
patent: 5870097 (1999-02-01), Snyder et al.
patent: 5959731 (1999-09-01), Jones
patent: 6016150 (2000-01-01), Lengyel et al.
patent: 6111582 (2000-08-01), Jenkins
patent: 6252608 (2001-06-01), Snyder et al.
patent: 6342887 (2002-01-01), Munroe
patent: 6897865 (2005-05-01), Higashiyama
patent: 6961058 (2005-11-01), Guo et al.
Agrawala et al., Efficient image-based methods for rendering soft shadows, Computer Graphics, (SIGGRAPH 2000 Proceedings) pp. 375-384.
Chang et al., LDI tree: a hierarchical representation for image-based rendering, Computer Graphics (SIGGRAPH 99 Proceedings) pp. 291-298.
Heckbert, Survey of texture mapping,IEEE Computer Graphics and Applications, 6(11):56-67, Nov. 1986.
Kajiya et al., Rendering fur with three dimensional textures. InComputer Graphics(SIGGRAPH '89 Proceedings), vol. 23, pp. 271-280, Jul. 1989.
Kajiya et al., Ray tracing volume densities. InComputer Graphics(SIGGRAPH '84 Proceedings), vol. 18, pp. 165-174, Jul. 1984.
Keating et al., Shadow penumbras for complex objects by depth-dependent filtering of multi-layer depth images. InEurographics Rendering Workshop 1999, pp. 205-220, New York, Jun. 1999. Springer-Verlag.
Levoy,Display of Surfaces from Volume Data.Ph.D. thesis, University of North Carolina at Chapel Hill, 1989.
Levoy et al., Light Field Rendering, Computer Graphics (SIGGRAPH '96 Proceedings) pp. 31-42.
Max, Hierarchical rendering of trees from precomputed multi-layer Z-buffers. InEurographics Rendering Workshop 1996, pp. 165-174, New York, Jun. 1996.
Shade et al., Layered depth images. InSIGGRAPH 98 Proceedings, pp. 231-242. Addison Wesley, Jul. 1998.
Soler et al, Fast calculation of soft shadow textures using convolution, Computer Graphics (SIGGRAPH 98 Proceedings) pp. 321-322.
Williams, Casting curved shadows on curved surfaces.Computer Graphics(SIGGRAPH '78 Proceedings), 12(3):270-274, Aug. 1978.
Williams, Pyramidal parametrics.Computer Graphics(SIGGRAPH '83 Proceedings), 17(3):1-11, Jul. 1983.
Woo et al., A survey of shadow algorithms.IEEE Computer Graphics and Applications, 10(6):13-32, Nov. 1990.
Lokovic et al.,Deep Shadow Maps. In Proceedings of SIGGRAPH 2000,ComputerGraphics Proceedings, Annual Conference Series, pp. 385-392, 2000. K. Akeley, editor, http://graphics.stanford.edu/papers/deepshadows, printed Sep. 1, 2004.
Mitchell, Consequences of Stratified Sampling in Graphics, (SIGGRAPH) '96 Proceedings, pp. 277-280, Adison Wesley, 1996.
Reeves et al., Rendering Antialiased Shadows with Depth Maps, Computer Graphics (SIGGRAPH) '87 Proceedings), vol. 21, pp. 283-291, 1987.

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