从实际应用出发,论述了光切法应用于曲面数据采样的原理及方法;对采样数据的预处理技术进行了简要总结,详细讨论了点云数据的精简,提出采用简化多边形来精简点云数据的方法;并说明在Geomagic环境下进行数据精简以及曲面重构技术的应用,证明了该方法的有效性。 Starting from practical application, the principle and method of light-cutting method applied to surface data sampling are discussed. Pre-processing of sampling data is briefly summarized. The streamlining of point cloud data is discussed in detail. A simplified polygon is proposed to simplify point cloud data The method of data reduction and surface reconstruction in Geomagic environment is also demonstrated. The method is proved to be effective.