NDLI: Volumetric shape description of range data using “Blobby Model”

Content Provider	ACM Digital Library
Author	Muraki, Shigeru
Abstract	Recently in the field of computer vision, there have been many attempts to obtain a symbolic shape description of an object by fitting simple primitives to the range data of the object. In this paper, we introduce the "Blobby Model" for automatically generating a shape description from range data. This model can express a 3D surface as an isosurface of a scalar field which is produced by a number of field generating primitives. The fields from many primitives are blended with each other and can form a very complicated shape. To determine the number and distribution of primitives required to adequately represent a complex 3D surface, an energy function is minimized which measures the shape difference between the range data and the "Blobby Model". We start with a single primitive and introduce more primitives by splitting each primitive into two further primitives so as to reduce the energy value. In this manner, the shape of the 3D object is slowly recovered as the isosurface produced by many primitives. We have successfully applied this method to human face range data and typical results are shown. The method herein does not require any prior range segmentation.
Starting Page	227
Ending Page	235
Page Count	9
File Format	PDF
ISSN	00978930
DOI	10.1145/127719.122743
Journal	ACM SIGGRAPH Computer Graphics (COMG)
Volume Number	25
Issue Number	4
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1988-08-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Implicit surface Volumetric shape description Ray tracing Blobby model Energy minimization Generalized algebraic surface Range data analysis
Content Type	Text
Resource Type	Article
Subject	Computer Science Computer Graphics and Computer-Aided Design

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