非量测数码相机单像空间后方交会的辅助分步像主距与像主点的简单测定

近年来,非量测的中、高端普通数码相机越来越多的应用到航空、近景等摄影测量领域3]。影响摄影测量成果精度的重要因素之一是相机的技术参数,因此相机技术参数的检校是保证成果质量能否满足精度要求的关键问题之一。本文着重讲述了在以单像空间后方交会为基础的相机检校中,受制于实践环境,当控制场各控制点的几何分布通常被布置离一个平面不大的范围内,则会使未知数的解极不稳定,甚至有不定解得可能。为防止出现错解以及不定解,先通过试验场检校给出像主距f和像主点(x0,y0)初始值,从而避免上述情况发生,文中给出了方法、原理及实践数据、结果。

A simple assistant measurement of principal point and distance of photo for non-metric digital camera space resection of single photo

Currently, non-metric digital camera has been used in aerial photography and close-range photogrammetry. The main factors which effects the precision is the parameters of the camera, so the parameters of camera is the key point to decide the result’s precision. This article gives a method for space resection of single photo. When the control points in the control field are distributing in a plane, because of the trial condition, the unknown parameters can’t be confirmed. So we do a trial to give the initial value of principal point of photograph f and principal distance of photo (x0, y0), to ensure the unknown parameters. This article gives the method, data and experimental result.