Appeal No. 96-3254
Application 07/991,019
The invention pertains to volume rendering which shows characteristics of the interior of a 3-D
object in a 2-D image. More particularly, the invention uses sampling points that are uniformly spaced,
forming a group of concentric spherical slicing isosurfaces around a viewing ray.
1. A method of volume rendering comprising the steps of:
extracting a group of concentric spherical slicing isosurfaces containing sampling points
positioned in equal intervals along a viewing ray originating from a viewing point, said extracting of said
group of concentric spherical slicing isosurfaces is performed by mapping input volume data onto said
concentric spherical slicing isosurfaces, wherein said concentric spherical slicing isosurfaces are each
extracted as a set of polygons;
generating polygon data having data values at vertices of said polygons; and
executing volume rendering by displaying said polygon data in a form of partially transparent
polygons.
The examiner relies on the following references:
Winget 5,113,490 May 12, 1992
(filed June 19, 1989)
Glassner 5,317,681 May 31, 1994
(filed Dec. 30, 1991)
James D. Foley, et al. (Foley), Computer Graphics, "Principles and Practice", Second Edition,
Addison-Welsey Publishing Company, 1990, pp. 1034-1039.
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