【摘要】 地面三维激光在数据采集方面具有独特的优势,但数据处理阻碍了它的广泛应用。为解决地面三维激光扫描仪在少特征物区域站点拼接与坐标转换的难题,提出先利用电子罗盘及RTK控制点实现站点数据概略拼接与坐标转换,然后采用ICP算法进行精拼,再利用序列精拼后形成的闭合条件进行精拼误差配赋,最后根据最小二乘法原理,对点云拼接后站点及RTK控制点形成刚性模型计算最佳密合平移、旋转矩阵,实现坐标转换误差调整,从而实现站点拼接与坐标转换。对利用三维点云提取的特征点进行精度评定,精度达厘米级。更多还原

【Abstract】 3D ground laser scanner has unique advantages in data acquisition,but its complicated data processing hinders its extensive application. In order to solve site splicing and coordinate transformation problem of 3D ground laser scanner in less feature area,the VZ2000 ground laser scanner was used for data acquisition. It is suggested that using electronic compass and the RTK control point to realize rough splicing and coordinate transformation firstly,then using ICP algorithm for fine splicing,using the closed condition formed by sequential fine splicing to assign the fine splicing error. According to the principle of least square method,the spliced site and RTK control points are used to form a rigid model to calculate the best fit translation and rotation matrix to adjust coordinate transformation error. This method is simple and high-accuracy to achieve site splicing and coordinate transformation. The evaluation using feature points extracted by 3 D point cloud and RTK coordinates indicates that the accuracy of the presented method reached centimeter level.更多还原