Before handling the reconstruction of human model based on 3d scanning data, data reduction was used.

以三维扫描数据为基础进行的人体重构，需要先进行数据精简。

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There is noise and defective data on the 3d scanning point cloud. A robust mesh reconstruction algorithm is proposed.

由于3维扫描点云通常存在噪音和缺失数据，提出了一种鲁棒的点云网格重建算法。

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Now the existing direct volume CT methods face two difficulties:first, how to get the projection data to reconstruct the 3D image exactly, including whether the scanning structure is practical;

目前直接体积CT主要存在两大困难：一是如何获得三维图像精确重建所需的投影数据，包括扫描方式的可实现性；

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