2003 Shape Modeling International.最新文献_第2页

Capturing the shape of a dynamic world - fast! 捕捉一个动态世界的形状-快!

2003 Shape Modeling International. Pub Date : 2003-05-12 DOI: 10.1109/SMI.2003.1199589

M. Magnor, H. Seidel

引用次数: 7

A topological entity matching technique for geometric parametric models 几何参数模型的拓扑实体匹配技术

2003 Shape Modeling International. Pub Date : 2003-05-12 DOI: 10.1109/SMI.2003.1199623

Dago Agbodan, D. Marcheix, G. Pierra, Christophe Thabau

{"title":"A topological entity matching technique for geometric parametric models","authors":"Dago Agbodan, D. Marcheix, G. Pierra, Christophe Thabau","doi":"10.1109/SMI.2003.1199623","DOIUrl":"https://doi.org/10.1109/SMI.2003.1199623","url":null,"abstract":"Nowadays, many commercial CAD systems support history-based, constraint-based and feature-based modeling. Unfortunately, most systems fail during the reevaluation phase when various kind of topological changes occur. This issue is known as \"persistent naming\" which refers to the problem of identifying entities in an initial parametric model and matching them in the reevaluated model. We propose a complete framework for identifying and matching any kind of entities based on their underlying topology. The identifying method is based on the invariant structure of each class of form features and on its topological evolution. The matching method compares the initial and the reevaluated topological histories. For each construction step, the matching consists of two phases. In the local phase, two measures of topological similarity are computed between any couple of entities occurring respectively in the reevaluated model and in the initial model. In the global phase, the final matching is defined as a binary relation that maximizes the topological similarity between the matched entities of both models. The naming and matching method has been implemented using the 3D modeling application development platform Open Cascade.","PeriodicalId":439885,"journal":{"name":"2003 Shape Modeling International.","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117120176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Rough surface modeling using surface growth 使用表面生长的粗糙表面建模

2003 Shape Modeling International. Pub Date : 2003-05-12 DOI: 10.1109/SMI.2003.1199599

Yootai Kim, R. Machiraju, D. Thompson

引用次数: 3

Generalized functional and decorative filleting and blending operations 通用功能性和装饰性的圆角和混合操作

2003 Shape Modeling International. Pub Date : 2003-05-12 DOI: 10.1109/SMI.2003.1199597

G. Elber

引用次数: 0

Using growing cell structures for surface reconstruction 利用生长的细胞结构进行表面重建

2003 Shape Modeling International. Pub Date : 2003-05-12 DOI: 10.1109/SMI.2003.1199604

I. Ivrissimtzis, W. Jeong, H. Seidel

引用次数: 102

A multi-scale approach to 3D scattered data interpolation with compactly supported basis functions 基于紧支持基函数的三维离散数据多尺度插值方法

2003 Shape Modeling International. Pub Date : 2003-05-12 DOI: 10.1109/SMI.2003.1199611

Y. Ohtake, A. Belyaev, H. Seidel

引用次数: 234

An intermediate level representation scheme for secondary features recognition and B-rep model simplification 一种用于二级特征识别和B-rep模型简化的中级表示方案

2003 Shape Modeling International. Pub Date : 2003-05-12 DOI: 10.1109/SMI.2003.1199606

F. Bianconi, P. Stefano

{"title":"An intermediate level representation scheme for secondary features recognition and B-rep model simplification","authors":"F. Bianconi, P. Stefano","doi":"10.1109/SMI.2003.1199606","DOIUrl":"https://doi.org/10.1109/SMI.2003.1199606","url":null,"abstract":"The presence of fillets, rounds, chamfers and grooves is typical of many real-world mechanical components. Such features introduce in the model various topological and geometrical modifications, which may alter the correct understanding of its main features. Another drawback which hinders the correct engineering evaluation of a part is that its geometrical and topological representation is not unique, since it depends either on the different procedures used to generate CAD models or on the different internal representation of the geometric kernels used by CAD packages. The overall aim of this work is to define an intermediate representation scheme, which incorporates information about minor features such as chamfers, fillets, rounds and grooves into a graph based representation and overcomes the problem of non-uniqueness in the geometric representation. The representation scheme discussed here takes as input a solid model in B-rep form, and provides a description of a part at a higher level of abstraction in comparison with the raw B-rep description. A procedure for secondary features recognition is also described in this paper. The proposed algorithm consists of two steps where both topological/geometrical properties and dimensional attributes are investigated in order to fulfill a correct recognition. The recognized secondary features are then inserted into the model as labels, which qualify the relationships between the faces of the graph representation. The resulting modeling scheme can be conveniently used for primary feature recognition as well as for other engineering analysis/simulation purposes.","PeriodicalId":439885,"journal":{"name":"2003 Shape Modeling International.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116027959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Classification and solving of merge patterns in geometric constraint solving 几何约束求解中合并模式的分类与求解

2003 Shape Modeling International. Pub Date : 2003-05-12 DOI: 10.1109/SMI.2003.1199605

X. Gao, Gui-Fang Zhang

引用次数: 6

Skeleton extraction of 3D objects with radial basis functions 基于径向基函数的三维物体骨架提取

2003 Shape Modeling International. Pub Date : 2003-05-12 DOI: 10.1109/SMI.2003.1199618

Wan-Chun Ma, Fu-Che Wu, M. Ouhyoung

{"title":"Skeleton extraction of 3D objects with radial basis functions","authors":"Wan-Chun Ma, Fu-Che Wu, M. Ouhyoung","doi":"10.1109/SMI.2003.1199618","DOIUrl":"https://doi.org/10.1109/SMI.2003.1199618","url":null,"abstract":"A skeleton is a lower dimensional shape description of an object. The requirements of a skeleton differ with applications. For example, object recognition requires skeletons with primitive shape features to make similarity comparison. On the other hand, surface reconstruction needs skeletons, which contain detailed geometry information to reduce the approximation error in the reconstruction process. Whereas many previous works are concerned about skeleton extraction, most of these methods are sensitive to noise, time consuming, or restricted to specific 3D models. A practical approach for extracting skeletons from general 3D models using radial basis functions (RBFs) is proposed. A skeleton generated with this approach conforms more to the human perception. Given a 3D polygonal model, the vertices are regarded as centers for RBF level set construction. Next, a gradient descent algorithm is applied to each vertex to locate the local maxima in the RBF; the gradient is calculated directly from the partial derivatives of the RBF. Finally, with the inherited connectivity from the original model, local maximum pairs are connected with links driven by the active contour model. The skeletonization process is completed when the potential energy of these links is minimized.","PeriodicalId":439885,"journal":{"name":"2003 Shape Modeling International.","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127330407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 107

New results in signal processing and compression of polygon meshes 在多边形网格的信号处理和压缩方面取得了新的成果

2003 Shape Modeling International. Pub Date : 2003-05-12 DOI: 10.1109/SMI.2003.1199600

G. Taubin

引用次数: 3