2026-09-21T10:20:10Zhttps://iris.unica.it/oai/request

oai:iris.unica.it:11584/2665002022-10-20T10:22:26Zcom_11584_207615com_11584_111066col_11584_265854

Understanding the Structure of 3D Shapes LIVESU, MARCO curve-skeleton parameterization perceptual shape-analysis polycube segmentation shape registration Settore INF/01 - Informatica Compact representations of three dimensional objects are very often used in computer graphics to create effective ways to analyse, manipulate and transmit 3D models. Their ability to abstract from the concrete shapes and expose their structure is important in a number of applications, spanning from computer animation, to medicine, to physical simulations. This thesis will investigate new methods for the generation of compact shape representations. In the first part, the problem of computing optimal PolyCube base complexes will be considered. PolyCubes are orthogonal polyhedra used in computer graphics to map both surfaces and volumes. Their ability to resemble the original models and at the same time expose a very simple and regular structure is important in a number of applications, such as texture mapping, spline fitting and hex-meshing. The second part will focus on medial descriptors. In particular, two new algorithms for the generation of curve-skeletons will be presented. These methods are completely based on the visual appearance of the input, therefore they are independent from the type, number and quality of the primitives used to describe a shape, determining, thus, an advancement to the state of the art in the field. 2014-05-23 info:eu-repo/semantics/doctoralThesis http://hdl.handle.net/11584/266500 eng numberofpages:138 info:eu-repo/semantics/openAccess Università degli Studi di Cagliari license:Non specificato