基于分段多项式模型的星载线阵CCD影像定向  

The Orientation of Spaceborne Linear Array CCD Imagery Based on Piecewise Polynomial Model

作　　者：贾博[1] 姜挺[1] 江刚武[1] 余岸竹[1] 

机构地区：[1]信息工程大学地理空间信息学院,郑州450052

出　　处：《影像技术》2013年第1期35-38,共4页Image Technology

摘　　要：根据星载线阵CCD传感器的成像机理,建立了基于分段多项式模型的影像定向模型,通过分析定位中系统误差的存在,将带有附加参数的自检校模型引入光束法平差中,研究不同控制点数量和不同分段数对定位精度的影响,并利用河南嵩山地区SPOT-5卫星影像数据对模型进行了实验验证和分析,结果表明,分段多项式模型可以很好的内插成像时刻外方位元素,同时自检校模型可以很好的补偿系统误差的影响,验证了模型的合理性。According to the imaging mechanism of push-broom sensor, an orientation model based on pieeewise polynomial is established. Systematic error in the process of positioning is analyzed, and then a self-calibrated model with auxiliary parameters is introduced in the bundle adjustment. Under the situation in which the numbers of GCPs and segments of the polynomial are different, series of experiments are earried out to testify the model on SPOT-5 imagery of Mount Song in Henan. The result indieates that piecewise polynomial can fit the exterior orientation elements very well, and systematic error is dramatieally offset by the serf-calibrated model. Consequently, the model is suitable for the positioning work of push-broom sensors.

关 键 词：线阵CCD 光束法平差 SPOT-5影像 影像定向 分段多项式模型 自检校 

分 类 号：P237[天文地球—摄影测量与遥感]