Research of underwater 3D imaging based on single-slit streak tube imaging lidar

Zelin Yue; Xiujuan Luo; Mengyan Fang; Hui Liu; Minglai Chen; Jing Zhao; Xing Wang; Ping Ruan

doi:10.1117/12.3032356

10 October 2024 Research of underwater 3D imaging based on single-slit streak tube imaging lidar

Zelin Yue, Xiujuan Luo, Mengyan Fang, Hui Liu, Minglai Chen, Jing Zhao, Xing Wang, Ping Ruan

Proceedings Volume 13278, Seventh Global Intelligent Industry Conference (GIIC 2024); 132781G (2024) https://doi.org/10.1117/12.3032356
Event: Seventh Global Intelligent Industry Conference (GIIC 2024), 2024, Shenzhen, China

Abstract

Compared to traditional underwater cameras, lidar can capture more dimensional information about targets, thereby offering substantial advantages in underwater target detection. The Single-Slit Streak Tube Imaging Lidar (SS-STIL) is a high temporal resolution device designed for 3D precision measurement. It operates on the principle of time-of-flight, recording the 3D information of target as multiple high-precision 2D streak images. These images are then used to reconstruct the target's 3D information through advanced reconstruction algorithms. Existing researches on the imaging quality of Streak Tube Imaging Lidar (STIL) often fall short in thoroughly investigating the impact of water turbidity on imaging quality and particularly lack quantitative measurements of underwater imaging environments. To address the aforementioned issues, we first performed theoretical calculations and simulations of the SS-STIL for imaging targets in both air and underwater environments. Based on these simulation results, we determined the parameters for the main modules of the actual imaging system. We measured the water's attenuation coefficient in the experimental setting using a photometer, quantified five levels of underwater turbidity, and conducted experiments with our SS-STIL under these five different conditions. At an imaging distance of 4.5m and a water attenuation coefficient of 0.51m^-1 , our SS-STIL system achieved an imaging resolution of 1cm and a spatial resolution of 3cm, which is superior to other existing STIL systems.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Zelin Yue, Xiujuan Luo, Mengyan Fang, Hui Liu, Minglai Chen, Jing Zhao, Xing Wang, and Ping Ruan "Research of underwater 3D imaging based on single-slit streak tube imaging lidar", Proc. SPIE 13278, Seventh Global Intelligent Industry Conference (GIIC 2024), 132781G (10 October 2024); https://doi.org/10.1117/12.3032356

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KEYWORDS

Signal attenuation

LIDAR

Imaging systems

Turbidity

3D acquisition

3D image processing

Spatial resolution

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