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This article presents a new and direct approach for fitting a subdivision surface from an irregular and dense triangle mesh of arbitrary topological type. All feature edges and feature vertices of the original mesh model are first identified. A topology-and feature-preserving mesh simplification algorithm is developed to further simplify the dense triangle(More)
In this paper, based on the possibility distribution and semantic measure of fuzzy data, an extended object-oriented database model to handle imperfect as well as complex object in the real-world is introduced. Some major notions in object-oriented databases such as objects, classes, object-classes, relationships , subclass/superclass and multiple(More)
Subdivision surfaces refer to a class of modelling schemes that define an object through recursive subdivision starting from an initial control mesh. Similar to B-splines, the final surface is defined by the vertices of the initial control mesh. These surfaces were initially conceived as an extension of splines in modelling objects with a control mesh of(More)
Reverse engineering is an approach for reconstructing a computer model from physical object through dimensional measurement and surface modelling. Various mathematical models have be discussed for the representation of free form surfaces in the context of reverse engineering applications. Most of the existing algorithms are, however, mainly developed for(More)