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一种海量无序小行星遥感影像匹配对快速确定方法

A Rapid Method for Match Pair Determination from Disordered and Massive Asteroid Images

  • 摘要: 针对海量无序小行星影像,提出了一种基于KD树空间索引快速搜索的高效影像重叠关系分析方法。以贝努、灶神星、龙宫等小行星探测任务的影像数据为实验对象,将提出的影像匹配对算法与美国地质调查局ISIS的相应模块进行系统比较,以评估其在效率和精度方面的性能。结果表明,在处理超过一千幅影像时,所提出的方法在保证影像重叠关系的正确性和光束法平差精度的前提下,极大地提升了获取影像匹配对的效率。同时,根据获得的影像匹配对,可以快速优选出符合立体光度法要求的影像,有效提高了小行星影像三维重建模型的质量。

     

    Abstract: This paper proposes an efficient method of image overlapping relationship analysis based on the spatial index of KD tree fast search for disordered and large-scale asteroid images. In this study, the image data from asteroid exploration missions such as Bennu, Vesta, and Ryugu are used for experiments, and the proposed image match pairs determination algorithm is comprehensively compared with the corresponding modules of USGS ISIS in order to evaluate its performance in terms of efficiency and accuracy. The results show that when processing more than a thousand images, the proposed method greatly improves the efficiency of acquiring image match pairs while ensuring the correctness of the image overlapping relationships and the accuracy of bundle adjustment. At the same time, according to the obtained image match pairs, images that meet the requirements of Stereo Photoclinometry can be quickly selected, effectively improving the quality of 3D reconstruction models of asteroid images.

     

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