Fast triangulation and local optimization for scan data of laser radar

In order to study the triangulation for the point cloud data collected by three-dimensional laser radar, in accordance with the line-by-line characteristics of laser radar scanning, an improved Delaunay triangulation method is proposed to mesh the point cloud data as a triangulation irregular network. Based on the geometric topology location information among radar point cloud data, focusing on the position relationship between adjacent scanning line of the point data, a preliminary match network is obtained according to their geometric relationship. A reasonable triangulation network for the object surface is acquired after the use of local optimization on initial mesh by Delaunay rule. Meanwhile, a new judging rule is proposed to contrast the triangulation before and after the optimization on the network. The result shows that triangulation for point cloud with full use of its own characteristics can improve the speed of the algorithm obviously, and the rule for judging the triangulation can evaluate the quality of network.     

发挥城市1:500图加密的技术优势

本文阐述用AC1解析测图仪进行1:500大比例尺城市测图加密的生产实践和技术特点,总结出提高加密精度的技术措施.     

基于全自动无刺点空中三角测量的航测内业生产新流程探讨

数字摄影测量是摄影测量的未来发展方向，作为摄影测量学内容的一部分，空中三角测量也将随着数字摄影测量技术的发展而推进。本文从空中三角测量和数字摄影测量的发展及其现状出发，对空中三角测量进行了较为系统的分析，提出了全自动无刺点空中三角测量的航测空三加密新方法，为摄影测量新技术的应用开辟了一个新途径，从而形成了一个航测内业生产的新流程。