Xiao-Nan Luo

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Modern computer graphics applications usually require high resolution object models for realistic rendering. However, it is expensive and difficult to deform such models in real time. In order to reduce the computational cost during deformations, a dense model is often manipulated through a simplified structure, called cage, which envelops the model.(More)
In computer graphics, object are often represented by triangle meshes. Iterative collapse of geometric elements is an important way to simplify the meshes. This paper presents a method for dividing the triangle mesh into certain kind of multi-edge mesh and puts forward a new mesh simplification algorithm based on the multi-edge mesh collapse. The algorithm(More)
Many applications of Virtual Reality require 3D models. In this paper, quadrangles in the triangle mesh are defined. We put forward a quadrangle collapse based mesh simplification algorithm which can rapidly produce high approximations of 3D models. The algorithm uses iterative collapse of quadrangle to simple models and maintains surface error(More)
Co-analyzing a set of 3D shapes is a challenging task considering a large geometrical variability of the shapes. To address this challenge, this paper proposes a new automatic 3D shape co-segmentation algorithm by using spectral graph method. Our method firstly represents input shapes as a set of weighted graphs and extracts multiple geometric features to(More)
In this paper, silhouettes preserved simplification for small-screen display is proposed. Silhouettes are determined simply by the normals of adjacent faces and the viewpoint directions. Thus, three kinds of triangles on the silhouette are defined: the Vertex Silhouette Triangle, the Edge Silhouette Triangle and the Angle Silhouette Triangle. By applying(More)
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