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Efficient 3D Object Simplification Algorithm Using 2D Planar Sampling and Wavelet Transform  

장명호 (LG전자 디스플레이제품연구소)
이행석 (금오공과대학교 컴퓨터공학)
한규필 (금오공과대학교 컴퓨터공학)
박양우 (경운대학교 멀티미디어공학부)
Abstract
In this paper, a mesh simplification algorithm based on wavelet transform and 2D planar sampling is proposed for efficient handling of 3D objects in computer applications. Since 3D vertices are directly transformed with wavelets in conventional mesh compression and simplification algorithms, it is difficult to solve tiling optimization problems which reconnect vertices into faces in the synthesis stage highly demanding vertex connectivities. However, a 3D mesh is sampled onto 2D planes and 2D polygons on the planes are independently simplified in the proposed algorithm. Accordingly, the transform of 2D polygons is very tractable and their connection information Is replaced with a sequence of vertices. The vertex sequence of the 2D polygons on each plane is analyzed with wavelets and the transformed data are simplified by removing small wavelet coefficients which are not dominant in the subjective quality of its shape. Therefore, the proposed algorithm is able to change the mesh level-of-detail simply by controlling the distance of 2D sampling planes and the selective removal of wavelet coefficients. Experimental results show that the proposed algorithm is a simple and efficient simplification technique with less external distortion.
Keywords
Mesh simplification; Polygonal surface simplification; Wavelet transform;
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