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针对传统方法进行着陆器降落轨迹恢复的精度较低或者算法过于复杂的问题,提出一种基于降落序列影像的着陆器轨迹恢复方法:首先采用SIFT方法进行序列影像间特征点的提取与匹配,然后利用得到的匹配点进行影像间的相对定向,最后结合降落相机和影像的相关参数等得到最终的着陆轨迹。采用嫦娥三号真实影像抽稀后开展了实验,结果表明该方法的实现过程简单且轨迹恢复结果与探月工程预期设计目标基本一致,证明提出的方法能够有效完成着陆器轨迹的恢复。
In order to solve the problem of low accuracy or too complicated algorithm of traditional lander landing trajectory restoration, a method of lander trajectory restoration based on landing sequence image is proposed. Firstly, SIFT method is used to extract and match the feature points of sequence images. Then, The matching points are used to make the relative orientation between the images. Finally, the final landing trajectory is obtained by combining the relevant parameters of the landing camera and the image. Experiments were carried out using the real image of Chang’e III, the results show that the method is simple to implement and the trajectory recovery results are basically the same as expected design goals of the lunar exploration project, which proves that the proposed method can effectively complete the recovery of the lander trajectory.