镜面辅助的地面三维激光扫描研究

完整性是地面三维激光扫描数据获取的基本要求，在文化遗产数字化存档这类以数据真实性为首要任务的应用中尤为重要。但实际工作中，往往因作业空间受限、遮挡严重等问题造成扫描的盲区和死角，从而导致数据获取不全的问题。对此，本项目提出利用镜面辅助激光扫描的思想，研究镜面对激光光束及激光扫描性能的影响机理、镜面的严格检校及高精度参数化表达方法、激光点云中镜面的检测与三维空间位置解算方法、多镜面协同辅助策略、激光点云真实坐标及强度解算方法，以及方法验证与精度评价等内容，为复杂场景中激光扫描数据获取的完整性提供完备的理论支撑和实用的技术方法。

Integrity, which is the basic requirement for terrestrial laser scanning data acquisition, is considered as the most important property in the applications like cultural heritage digital archive, which makes data authenticity as a top priority. In practical work, however, due to the limitations of space and the serious occlusion, data cannot be completely acquired and thus bind spot and blind angle exist. To tackle this issue, this project proposes a mirror aided laser scanning method, which works on the influencing mechanism for the mirror to the laser beam, the strict calibration of mirror and high precision parametric expression method, mirror detection in point cloud and 3D position calculating method, multiple mirrors cooperating strategies, point cloud real coordinates and intensity calculating method, as well as the validity of the whole approach and precision evaluation. To conclude, this project provides complete theoretical support and practical technical methods for the integrity of laser scanning data acquisition.