Surface subdivision for generating superquadrics

作     者：Montiel, ME Aguado, AS Zaluska, E 

作者机构：Univ Southampton Southampton Hants England 

出 版 物：《VISUAL COMPUTER》 (视觉计算机)

年 卷 期：1998年第14卷第1期

页      面：1-17页

核心收录：

学科分类：08[工学] 0835[工学-软件工程] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

主　　题：modelling of surfaces surface subdivision parametric surfaces superquadrics superellipses rendering techniques display algorithms curve tracing tessellation reparameterisation deformations 

摘      要：Superquadrics have been considered as important models for part-level description in computer graphics and computer vision. The description power of these models resides in their parameterised nature, which allows the definition of a wide variety of shapes, yet maintains a compact characterisation. We present a subdivision technique for modelling and displaying superquadrics. The method defines the surface of a superquadric as a deformation of an ellipsoid. The linear are-length parameterisation obtained provides a regular distribution of the parameters along the surface. Furthermore, the definition simplifies computations in scanning by avoiding the evaluation of rational exponents. We exploit the geometric properties of an ellipsoid during subdivision for additional simplification.