[1] [1] Kong W, Hu T, Zhang D, et al. Localization framework for real-time UAV autonomous landing: an on-ground deployed visual approach[J]. Sensors, 2017, 17(6): 1437.

[2] [2] Yang T, Li G, Li J, et al. A ground-based near infrared camera array system for UAV auto-landing in GPS-denied environment[J]. Sensors, 2016, 16(9): 1393.

[4] [4] Yuan B, Ma W, Wang F. High speed safe autonomous landing marker tracking of fixed wing drone based on deep learning[J]. IEEE Access, 2022, 10: 80415-80436.

[8] [8] Zhu J, Xu Z, Fu D, et al. Laser spot center detection and comparison test[J]. Photonic Sensors, 2019, 9: 49-52.

[9] [9] Zhao H, Wang S, Shen W, et al. Laser spot centering algorithm of double-area shrinking iteration based on baseline method[J]. Applied Sciences, 2022, 12(21): 11302.

[15] [15] Chen M, Zhang Z, Wu H, et al. Otsu-Kmeans gravity-based multi-spots center extraction method for microlens array imaging system[J]. Optics and Lasers in Engineering, 2022, 152: 106968.