关键词: Loop细分, 齿面重建, 尖锐特征, 散乱数据, 深度估计

Abstract: To establish the precise digital tooth surface containing the characteristics of topological modification in gear modification technology,a kind of tooth surface subdivision algorithm for a large number of unorganized points based on reconstruction of the given precision was presented.By preprocessing the large number of unorganized points which was taken as input,the initial mesh with certain approximation was constructed by using spiral growth algorithm.The initial mesh was segmented with the characteristics of Loop subdivision.According to the given precision,the minimum number of segmentation meeting the precision was estimated.The segmentation points was adjusted cross over and over again and making the reconstruction of tooth surface constantly close to the actual tooth surface after each segment.Through the error analysis of comparison between tooth surface reconstruction with actual tooth surface,the feasibility and accuracy of the algorithm were proved.

Key words: Loop subdivision, tooth surface reconstruction, sharp features, unorganized points, depth estimation