A Data Segmentation Technique for Triangular Meshes in Reverse Engineering

逆向工程之網格特徵分離

賴景義(Jiing-Yih Lai) ； 蔡耀震(Yao-Chen Tsai)

《中國機械工程學刊》 28卷3期 (2007/06) Pp. 289-300

https://doi.org/10.29979/JCSME.200706.0005

摘要

逆向工程為一種由實物模型重建CAD模型的技術，藉由三維量測機具量測物體表面，得到掃描點資料，再建構成CAD模型。點資料處理是整個逆向工程的第一步，大量的點資料讓模型重建的困難度提高，本研究的主要目的是發展一系列的網格資料特徵分離技術，依照物件的幾何造型特性將網格資料作區域分割，提出由點曲率的運算得到特徵區域，並將特徵區域做最佳化處理，進而以網格分離的技術將特徵區域各自獨立出來，發展出整體的網格特徵分離技術。針對幾何特徵變化大的網格資料，本研究將特徵分離技術流程化，並以範例說明之。

並列摘要

In reverse engineering it is necessary to reconstruct a surface that can be trimmed with other surfaces. The cloud points should be partitioned into appropriate feature regions so that each of them can be fitted into a surface. We proposed a data segmentation algorithm for the partition of the triangular meshes. It was composed of the following four steps: computing characteristic values, feature regions classification, merging unnecessary regions and partitioning meshes. An integrated procedure incorporating the above steps and appropriate user interface was proposed for realistic implementation. Successful examples were provided also to demonstrate the feasibility of the proposed method.

並列關鍵字

data segmentation ； point curvature ； reverse engineering