中文摘要：

针对L0级机载三线阵影像数据量大以及变形大的问题,提出一种基于SIFT和相关系数法匹配相结合的连接点提取方法。首先,建立金字塔影像后,在影像金字塔顶层采用SIFT算法匹配同名点;然后,基于金字塔匹配传播以及相关系数法实现连接点的传递;最后,通过POS数据几何约束剔除可能的误差,并进行分布优化。3个条带ADS40影像的试验结果表明：与常规连接点提取方法相比,该文方法匹配正确率提高6%以上,且连接点分布更均匀,可以满足自动空三的需求。

英文摘要：

To tackle the problem of the large quantities and serious deformation of L0 level airborne three - line - array images, this paper proposes a tie point matching method based on SIFT algorithm and correlation coefficient. Firstly, pyramid image is generated and SIFT algorithm is used to match initial corresponding points on the top - level of pyramid image. Then tie points are propagated through pyramid images via correlation coefficient matching method. Finally, possible match error is removed based on geometric constraint of POS data, and distribution of tie points are optimized. Three stripes of ADS40 images were used for experiments. Compared with the conventional image tie point transfer method, the proposed method can improve the ratio of correct matches by more than 6% and the tie points are well- distributed.