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《Journal of Computer-Aided Design & Computer Graphics》 2010-01
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Reconstruction of Cement Particle By Contour Extraction and Adaptive Partitioning of Unity

Wang Yanan1),Yang Bo1),and Zhao Xiuyang1,2)1)(School of Information Science and Engineering,University of Jin'an,Ji'nan 250022)2)(School of Computer Science and Technology,Shandong University,Ji'nan 250101)  
In order to obtain the real initial hydration model of cement particles,a novel shape reconstruction approach of cement particles,which integrates methods of slices-based reconstruction and multi-level partitioning of unity(MPU) implicit model,is presented.It combines the geodesic/geometric active contour(GAC) model and the active contour without edges(ACWE) model with a weight function to extract the raw contours of cement particles from a series of sample grey images by global minimization.The accurate particle contours are determined by accounting for the largest grey variance between-different classes.These 2D contours are then converted to 3D points and the normal at each sample point is estimated by plane fitting.The global shape of the 3D cement particles are reconstructed with the improved MPU method.Experimental results show that the proposed approach is not only capable of acquiring more satisfactory reconstruction results compared with other cement material reconstruction methods but also easy to implement.
【Fund】: 国家自然科学基金(60873089);; 山东省自然科学杰出青年基金(JQ200820);; 山东省博士基金(2007BS04018);; 山东教育厅科技项目(J07YJ23)
【CateGory Index】: TP391.41
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