普通相机近景影像空三加密精度分析

为验证利用普通数码相机获取地面近景影像方案的可行性，为后续航空影像与地面近景影像联合解算提供依据，利用重叠度公式和摄影比例尺公式推求本实验普通数码相机的摄影距离、摄影基线与重叠度之间的关系，并利用光束法区域网平差对影像进行平差解算。实验结果表明，利用普通数码相机及该文的摄影方案在地面采集的影像质量可以达到与航空摄影数据进行联合解算的精度要求，并且重叠度和控制点数量增加可以提高空中三角测量精度。

Aerial Triangulation Accuracy Analysis of Close-range Images Based on Digital Camera

This paper used ordinary digital camera to obtain ground images and analyzed the precision of aerial triangulation.We used overlapping degree formula and photographic scale distance formula to derive the relationship of photography distance，photography base，and the overlapping degree.And the method of bundle adjustment was used to calculate the images.In this paper，four groups of experiments were carried out and the results showed that the use of ordinary digital camera and the photographic method in this paper could reach the precision requirement which can be calculated with aerial photography images，and the precision of aerial triangulation increased with the increasing of overlapping degree and number of GCPs.