“点云”数据的预处理和曲面重建技术是反求工程的关键技术，是产品CAD模型建立的前提。
Preprocessing of "points cloud" data and surface reconstruction are the critical technology of reverse engineering and are the premises of building product CAD model.
提出了一种新的基于神经网络的点云数据重构CAD光顺造型的新算法。
The paper presents a new approach to CAD model reconstruction from cloud datas using neural networks (NN).
主要研究内容包括：数据采集系统设计、图像预处理、滤波方法的选择及其算法、点云生成、三维CAD模型重构。
The main content includes the design of original data collecting system, Image preprocessing, selection and algorithm of filtering method, points cloud creating, reconstruction of 3d CAD model.
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