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computer aided design and computer graphics, 2005. ninth international conference on

作者： BianRu Li Yue Qi XuKun Shen School of Computer Science & Engineering BeiHang University

ISBN: (纸本)0769524737

Image inpainting technique has been widely used for reconstructing damaged old photographs and removing unwanted objects from images. In this paper, we present an image inpainting method based on the existing exemplar-based image inpainting idea. Our method improves the robustness and effectiveness by rational confidence computing method, matching strategy and filling scheme. Therefore, our method effectively prevents "growing garbage", which is a common problem in other methods. With our method, we can obtain preferable results to those obtained by other similar methods.

关键词： image denoising image reconstruction image inpainting image reconstruction rational confidence computing

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Replicated collaborative solid modeling and naming problems

Replicated collaborative solid modeling and naming problems

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computer aided design and computer graphics, 2005. ninth international conference on

作者： Bin Liao Fazhi He Shuxu Jing School of Computer Science and Technology Wuhan University China

ISBN: (纸本)0769524737

A method of multi-user interaction in replicated collaborative solid modeling (CSM) is proposed. New challenges and problems of name consistency are analyzed. A roadmap for name consistency is explored. The roadmap uses a distributed method to correspond topological entities across sites. A faceIndex structure is organized to enable overall corresponding among intervals of interaction steps. A priority point based method is presented to sort exact faceIndex of faces inside each step. The above methods are illustrated with a case study.

关键词： groupware solid modelling faceIndex structure multiuser interaction name consistency naming problems priority point based method replicated collaborative solid modeling roadmap

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Co-ordination aided computational design

Co-ordination aided computational design

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9th international conference on computer Supported Cooperative Work in design

作者： Coates, G Univ Durham Durham DH1 3HP England

ISBN: (纸本)1846000025

Co-ordination is an emerging area of design management as well as organisational theory and distributed artificial intelligence. This paper highlights the need for co-ordination within computational environments such as those related to computer supported co-operative work and workflow management. The key characteristics of co-ordination identified are implemented within an agent-based system aimed at aiding computational design. This system has been applied to an industrial case study involving a computational design process enabling more efficient use of time and resources through coordination.

关键词： computational design co-ordination agents CSCW

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Motion retargeting and transition in different articulated figures

Motion retargeting and transition in different articulated f...

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computer aided design and computer graphics, 2005. ninth international conference on

作者： Ming-Kai Hsieh Bing-Yu Chen Ming Ouhyoung National Taiwan University Taiwan

ISBN: (纸本)0769524737

In this paper, we present an interactive system to transfer and concatenate motions in different articulated figures, such as human and dog. This system first constructs a union skeleton that contains both bone structures with bone correspondence manually assigned by users, and then aligns the initial poses of these two skeletons. With the initial poses aligned, motion data can be transferred between them. In addition, by blending similar poses of different skeletons, we can produce a seamless transition sequence which can be used to drive a meta-mesh and generate an animated morphing result.

关键词： computer animation image motion analysis image thinning interactive systems articulated figures interactive system motion concatenation motion retargeting motion transition union skeleton

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A simple normal enhancement technique for interactive non-photorealistic renderings

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computerS & graphics-UK 2005年第1期29卷 125-133页

作者： Cignoni, P Scopigno, R Tarini, M CNR Ist Sci & Tecnol Informaz I-56124 Pisa Italy

We present a simple technique to improve the perception of an object's shape. Bump mapping is well known in the computer graphics community for providing the impression of small-scale geometrical features, which are not explicitly modelled. Here, we propose a similar approach (variation of normals) for the purpose of enhancing the perception of a given geometry. Our approach is based on a simple modification of the surface hormals in order to enhance the geometric features of the object during the rendering. The enhanced normals produced by this approach can be used in any rendering technique. The technique presented is particularly well suited to improve the rendering of mechanical parts where common straightforward shading techniques can often generate shading ambiguities. (c) 2004 Elsevier Ltd. All rights reserved.

关键词： display algorithms non-photorealistic rendering (NPR) computer-aided design (CAD)

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High quality triangulation of implicit surfaces

High quality triangulation of implicit surfaces

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computer aided design and computer graphics, 2005. ninth international conference on

作者： Shengjun Liu Xuehui Yin Xiaogang Jin Jieqing Feng State Key Lab of CAD&CG Zhejiang University Hangzhou 310027 P.R. China

ISBN: (纸本)0769524737

We present a new high quality tessellation method for implicit surfaces in this paper. The approach can handle arbitrary implicit functions and dynamic implicit surfaces based on skeletal primitives. We first samples the implicit surface uniformly using particle fission and floating, then reconstructs a triangular mesh from the sample points using ball pivoting algorithm (BPA). Finally, we subdivide the reconstructed surface using a 1 to 4 subdivision scheme to obtain the high quality implicit surface tessellation.

关键词： computational geometry computer graphics mesh generation ball pivoting algorithm high quality triangulation implicit surfaces particle fission particle floating surface tessellation triangular mesh

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Are today's verification tools able to handle current design challenges?

Are today's verification tools able to handle current design...

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international conference on computer design

作者： Goering, R Faris, R Larsen, K Foster, H Swwan, S EE Times RealIntent Mentor Graphics United States Jasper DA United States Cadence Design Systems United States

ISBN: (纸本)0769524516

With the ever increasing growth of size and complexity of digital designs, tools have just kept pace. design engineers bare the brunt of the problem. To make use of dynamic verification, designers invest as much or more time into their testbenches as they do in the design they are creating. For static or formal verification, large designs with complex state spaces have challenged even the most powerful formal tools. What changes are coming in the design and EDA spaces that will improve this situation? What is the right mix of dynamic and static verification for the future? © 2005.IEEE.

关键词： computer aided design

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The constraint elevation for parametric continuity order of NURBS curve and surface

The constraint elevation for parametric continuity order of ...

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computer aided design and computer graphics, 2005. ninth international conference on

作者： Xiangjiu Che Dayou Liu Zhengxuan Wang College of Computer and Technology Jilin University Changchun China 130012

ISBN: (纸本)0769524737

For the NURBS curve that hold the arbitrary degrees and generally structured knots, under the assumption of unchanging the knot vector and the degree of NURBS curve, we present the constraint conditions for elevating the parametric continuity order of NURBS curve at the interior knots by modifying their control points and weights. Meanwhile, we obtain the freedom degree of the control points and the weights when the parametric continuity order of NURBS curve elevates by one. Furthermore, we obtain the conditions for elevating the parametric continuity order of NURBS surface along its isoparametric line by modifying their control points and weights. Meanwhile, the freedom degree of the control points and the weights when the parametric continuity order of NURBS surface elevates by one is presented at the end.

关键词： computational geometry NURBS curve NURBS surface isoparametric line parametric continuity order

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Research and application of bionical methods and models for automated design of the round routes of geometrical objects

Research and application of bionical methods and models for ...

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15th international conference on computer graphics and Vision, GraphiCon 2005

作者： Pushkaryova, Galina Department of Automated Control Systems Novosibirsk State Technical University Russia

The results obtained allow to offer the effective algorithms based on the bionics principles for solving the wide class of discretecontinuous structure problems. The application of the methodology of genetic programming to a computer-aided design of the control programs for CNC (computer numerical control) machine tools for thermal metal cutting is considered. The way of deciding the considered problem is based on integration of artificial intelligence technologies with methods of mathematical programming and computing - retrieval procedures.

关键词： Decision making

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Supporting creative thinking in design with computational approach

Supporting creative thinking in design with computational ap...

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9th international conference on computer Supported Cooperative Work in design

作者： Liu, H Duan, HC Liu, XY Shandong Normal Univ Sch Informat & Management Jinan Peoples R China

ISBN: (纸本)1846000025

In this paper, we present a novel computational approach for stimulating creativity of designers. The tree structured genetic algorithm is used for generating 2D sketch shapes and 3D images. This approach is illustrated by an artwork design example, which uses general mathematical expressions to form 2D sketch shapes for artistic flower vases and the combination of general and complex function expressions to form 3D images of artistic flowers. It shows that approach is able to generate some solutions for supporting creative thinking of designers.

关键词： computational approach genetic algorithm computer-aided design creative design

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