Distorted Laser Spot Center Positioning Based on Captured Image Under Laser-Camera Misalignment in UOWC

Weijie Liu; Yingying Jiang; Nuo Huang; Shangbin Li; Zhengyuan Xu

doi:10.1109/JPHOT.2023.3267027

IEEE Photonics Journal (Jan 2023)

Distorted Laser Spot Center Positioning Based on Captured Image Under Laser-Camera Misalignment in UOWC

Weijie Liu,
Yingying Jiang,
Nuo Huang,
Shangbin Li,
Zhengyuan Xu

Affiliations

Weijie Liu: ORCiD; CAS Key Laboratory of Wireless-Optical Communications, School of Information Science and Technology, University of Science and Technology of China, Hefei, China
Yingying Jiang: ORCiD; CAS Key Laboratory of Wireless-Optical Communications, School of Information Science and Technology, University of Science and Technology of China, Hefei, China
Nuo Huang: ORCiD; CAS Key Laboratory of Wireless-Optical Communications, School of Information Science and Technology, University of Science and Technology of China, Hefei, China
Shangbin Li: ORCiD; CAS Key Laboratory of Wireless-Optical Communications, School of Information Science and Technology, University of Science and Technology of China, Hefei, China
Zhengyuan Xu: ORCiD; CAS Key Laboratory of Wireless-Optical Communications, School of Information Science and Technology, University of Science and Technology of China, Hefei, China

DOI: https://doi.org/10.1109/JPHOT.2023.3267027
Journal volume & issue: Vol. 15, no. 3
pp. 1 – 6

Abstract

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The laser spot center positioning is an essential step for camera-based terminal positioning and alignment in a long-distance laser-based underwater optical wireless communication (UOWC) system. In this paper, the laser spot profile distorted by laser-camera misalignment is examined and a principal component analysis (PCA)-based spot center estimation algorithm is proposed. The centroid offset of the distorted laser spot under different deflection angles, transmitted optical powers and camera exposure values is experimentally demonstrated and analyzed. The estimation performance and the impact of the three parameters are also studied. Experimental results show that the proposed PCA-based algorithm significantly outperforms conventional gray centroid-based positioning method under different conditions.

Published in IEEE Photonics Journal

ISSN: 1943-0655 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics; Science: Physics: Optics. Light
Website: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4563994

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