利用非精密平面标定场实现高精度相机标定  

High precision camera calibration using a non-precision planar calibration field

作　　者：孙华生 翟秋萍 史云飞 吕春光 卞西蜀 SUN Huasheng;ZHAI Qiuping;SHI Yunfei;LYU Chunguang;BIAN Xishu(Shandong Provincial Key Laboratory of Soil and Water Conservation and Environmental Protection,School of Resources and Environment,Linyi University,Linyi,Shandong 276000,China;Linyi Land Survey and Planning Station,Linyi,Shandong 276000,China)

机构地区：[1]临沂大学资源环境学院(水土保持与环境保育研究所),山东临沂276000 [2]临沂市土地勘察规划站,山东临沂276000

出　　处：《测绘科学》2020年第9期78-85,共8页Science of Surveying and Mapping

基　　金：国家自然科学基金资助项目(41601555,41977067);山东省自然科学基金项目(ZR2016DB06,ZR2017BD018,ZR2018PD007);国土资源部城市土地资源监测与仿真重点实验室开放基金项目(KF-2016-02-017,KF-2018-03-034)。

摘　　要：针对传统平面相机标定算法必须依赖精密标定场的问题,提出了一种能够适应非精密平面标定场的相机标定算法。该算法可在平面标定场存在较大变形的情况下,获取较为可靠的初始值,然后通过对相机内外参数和世界坐标点同时进行光束平差优化,即可得到非常精确的标定结果。根据实验对其实际标定效果的测试表明,即使在平面标定场存在较大变形的条件下,仍然能够利用该算法得到高精度的相机标定结果。所提出的相机标定方法比传统算法具有更强的适应性,且在实际应用中非常灵活方便。Traditional camera calibration methods have to rely on a high-precision calibration field.To solve this problem,a new calibration algorithm which can adapt to the non-precision planar calibration board was proposed in this paper.Relative accurate initial values of the internal and external parameters can be gotten even the calibration board has a big deformation,and high precision calibration results could be gotten by the optimization of bundle adjustment on the initial values of internal and external parameters,as well as the world coordinates.Experiments were carried out to validate the actual calibration effects,and results showed that the new algorithm can get high precision camera calibration results,even if the calibration board has a big deformation.Therefore,the proposed algorithm has stronger adaptability than the traditional ones,and it is more flexible and convenient in the practical application.

关 键 词：相机标定 平面标定 非精密平面标定场 光束平差 

分 类 号：TP751[自动化与计算机技术—检测技术与自动化装置]