一种局部平差影像添加策略的三维重建方法  

The 3D-reconstruction based on a new strategy of adding images

作　　者：张岱伟 许彪[1] 董友强 张力[1] ZHANG Daiwei;XU Biao;DONG Youqiang;ZHANG Li(Chinese Academy of Surveying&.Mapping,Bejing 100036,China;College of Geoscience and Surveying Engineering,China University of Mining and Technology.Beijing 100083,China;School of Geomatics and Urban Information,Beijing University of Civil Engineering and Architecture,Beiing 102616,China)

机构地区：[1]中国测绘科学研究院,北京100036 [2]中国矿业大学(北京)地球科学与测绘工程学院,北京100083 [3]北京建筑大学测绘与空间信息学院,北京102616

出　　处：《测绘科学》2020年第6期103-109,133,共8页Science of Surveying and Mapping

摘　　要：针对现有三维重建算法在仍存在影像丢失和在弱连接区域平差失败的现象,该文提出一种采用局部平差影像添加策略的三维重建方法。该方法在影像选取时,采用局部平差,平差后选取限差合格的连接点,根据符合限差点的数量选取下一张影像,从而保证了连接点的质量;在全局平差阶段,按照局部平差计算的限差添加连接点,从而保证全局平差尽可能地成功。经测试,所提方法仍可以提高重建的稳定性,降低经验筛选对影像添加过程的影响,在影像连接关系弱、经验筛选不足的区域有明显优势。Aiming at the the limitation that still existed in the existing three-dimensional reconstruction algorithm,such as some images could not add to reconstruction and the global bound adjustment often failed in the pair which had weakly connected,this paper proposed a new threedimensional reconstruction strategy which adopted a new image selection strategy and adaptive threshold global bound adjustment.The image selection strategy first had a local adjustment to the new join points,then selected the qualified connection points that their reprojection error was less than the limit;finally,select the image to be added,according to the number of connection points after adjustment.The threshold estimated by the local bound adjustment report,in order to ensure the global bound adjustment success.Experimental results showed that our method could improve the stable of the three-dimensional reconstruction and reduce the requirement of two view geometry based on experience.The algorithm had good performance of the pair which had weakly connected.

关 键 词：三维重建 影像添加策略 局部平差 连接点 连接点质量 

分 类 号：P237[天文地球—摄影测量与遥感]