摘要
为了提高工业摄影测量的解算精度,围绕平差解算过程中基准的选择问题进行了分析和论证。首先介绍了现有平差过程的基准,分析了采用拟稳基准的合理性;然后基于自检校光束法平差和秩亏自由网平差原理,设计了拟稳基准的G矩阵,构建了基于拟稳基准的自检校光束法平差的法方程。通过实验对比分析了不同基准的平差效果,结果表明:拟稳基准的平差结果精度更高且分布更为均匀。
In order to improve the calculating accuracy of industrial photogrammetry,the selection of adjustment datum is analyzed and demonstrated.Firstly,the adjustment datum of industrial photogrammetric network is introduced from the aspects of scale datum and position pose datum,and the rationality of quasi-datum is analyzed.Then,based on the theory of self-calibration bundle adjustment and rank-defect free network adjustment,the G matrix of quasi-stable datum is designed,and the normal equation of rank-defect self-calibration bundle adjustment is established.Finally,the affection of different datum on adjustment result are compared through experiment,and the results show that：the adjustment result of quasi-stable datum is more accurate and well distributed than the results of other datum.
出处
《北京测绘》
2017年第01S期223-227,共5页
Beijing Surveying and Mapping
关键词
工业摄影测量
拟稳基准
自检校光束法平差
industrial photogrammetry
quasi-stable datum
self-calibration bundle adjustment
