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用于摄影测量的相机,出厂前必须进行“校准”,给定相机的主距并保证畸变在规定的允差之内。这种“校准”是对相机进行的,它与单独测量物镜的畸变和确定“有效焦距”不完全是一回事。本文介绍了一种利用测量相机自身测角度盘作测角系统,测定相机主距及畸变的方法及其装置,给出了九台相机的实测数据,分析了误差源,最后提出了一些讨论意见。
Cameras used for photogrammetry must be “calibrated” at the factory, given the main distance of the camera and to ensure that distortion is within specified tolerances. This “calibration” is done with the camera and is the same thing as measuring the distortion of the objective separately and determining the “effective focal length”. In this paper, a method and device for measuring the main distance and distortion of a camera by measuring the angle measuring plate of the camera are introduced. The measured data of nine cameras are given, the error sources are analyzed, and some opinions are put forward finally .