通过分析三维激光扫描系统获取的点云数据，得到了利用点云数据构建三维模型的技术、方法和流程。介绍了利用地面三维激光扫描仪获取点云数据的过程以及结合RiSCAN PRO软件和Geomagic Studio软件进行建模的方法。对原始测量的点云数据进行处理（去除噪声，平滑，对多站点数据做拼接配准，提取目标建筑物等）得到正确和完整的目标建筑物的表面信息，然后构建三角网建立它的三维表面模型，最后通过所拍的照片进行纹理映射得到真实的三维模型。实验结果表明，利用上述方法可以有效地处理三维激光扫描获取的点云数据，实现对建筑物快速三维可视化建模。

The technique, method and workflow of building 3D model through the use of 3D laser scanning system to acquire point cloud data are presented. The point cloud data acquirement process and the combination of RiSCAN PRO software and Geomagic Studio software to build 3D model are discussed. The original measurement data (noise elimination, smoothing, data registration, target object extraction and so on) are processed to get the exact and full facet information of the target, and then a triangular mesh model is built for the target. Finally, through texture mapping done by using photos taken in the data acquirement process, the real 3D model of the target object is got. The experiment shows that the point cloud acquired by 3D laser scanning system can be effectively dealt with and the 3D model can be achieved via the technique mentioned above.