地面检校场的非量测型数码相机检校

Calibration of non-metric digital camera based on calibration field

由于相机检校作为非量测型数码相机应用于摄影测量前的必经步骤,其精度直接决定着后续测图的精度,因此针对传统的相机检校方法不能较真实地反映相机的物理状态、检校精度不高的问题,该文给出了基于地面检校场进行检校的流程,并以和静县数据为例,将该方法的检校精度与基于室内三维检校场以及基于纯平液晶显示器的检校精度进行了对比。实验表明:经该方法检校出来的相机参数精度更高,能够满足大比例尺测图要求。

Before use of non-metric digital camera in photogrammetry,camera calibration is an essential step,whose accuracy determines directly the accuracy of mapping.Compared with other methods,the camera calibration based on calibration field can reflect the physical state of camera in work,and find new system error caused by wear and tear,in order to improve the precision of camera calibration efficiently.This article gave the calibration process of camera calibration,and taking Hejing county as example,compared the accuracy of calibration parameters based on calibration field with that of calibration parameters based on indoor 3Dcamera calibrating network and completely flat liquid crystal display.The result showed that the accuracy of the parameters based on calibration field would be higher and meet the requirements of large scale mapping.