首先对获得的散乱数据点云进行多边形化，然后根据数据点局部表示对每点的法矢和曲率进行估算。

In this paper, we first polygonize the scattered data points, then estimate the normal vector and curvature of each point using the local presentation of data points.

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实验表明该算法能够快速准确的提取三维散乱数据点的边界点。

The experiment result illustrate that the algorithm can extract the boundary points more efficient and exactly.

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