非量测数码相机的畸变差检测研究

The research on calibration of the non-measurement camera

本文主要研究利用数字畸变模型和附加参数的光束法平差对非量测数码相机进行内方位元素和畸变差的测定。分别运用两种检校方法对UAVRS Ⅱ无人机遥感系统机载非量测数码相机进行检校实验,并采用统一比例尺的方法进行精度比较。实验结果表明两种方法检校精度接近,证明了该面阵数码相机的畸变基本符合系统畸变规律,只存在极少量的随机畸变,也进一步证明了利用数字畸变模型纠正数码相机畸变差的可行性。

In this paper,two calibration method,which are based on DDM~^([3])(Digital Distortion Model)and additional parameters bundle adjustment algorithm,are discussed to determine the internal geometric and systematic distortion parameters of the digital camera.The two method are applied into the calibration of the airborne digital camera of the UAVRS-Ⅱ~^([1])(unmanned air vehicle for remote sensing system).In order to analyze the accuracy,different scales are unified to draw comparisons.Experimental results indicate that the distortion of the array digital camera calibrated conforms to the systematic distortion rules besides a little random distortion.Conclusions are drawn that it is feasible to adopt the DDM method to correct the distortion of the digital cameras.