Opt Express. 2021 Apr 12;29(8):12010-12023. doi: 10.1364/OE.421937.
Underwater imaging is a challenging task because of the large amounts of noise and the scattering nature of water. Conventional optical methods cannot realize clear imaging in underwater conditions owing to the limitations of low sensitivity, geometrical aberrations, and the narrow spectrum of photoelectric detectors. By contrast, single-pixel imaging (SPI) is a promising tool for imaging in poor-visibility environments. Nevertheless, this challenge is faced even when using traditional SPI methods in highly turbid underwater environments. In this work, we propose a Hadamard single-pixel imaging (HSI) system that outperforms other imaging modes in turbid water imaging. The effects of laser power, projection rate, and water turbidity on the final image quality are systematically investigated. Results reveal that compared with the state-of-the-art SPI techniques, the proposed HSI system is more promising for underwater imaging because of its high resolution and anti-scattering capabilities.
水下成像是一项具有挑战性的任务，因为水中存在大量的噪声和散射现象。由于光电探测器的灵敏度低、几何像差以及光谱范围窄，传统的光学方法无法在水下条件下实现清晰成像。相比之下，单像素成像（SPI）是一种在低能见度环境下进行成像的有前途的工具。然而，即使在高度浑浊的水下环境中使用传统的 SPI 方法，也会面临这一挑战。在这项工作中，我们提出了一种在浑浊水中成像性能优于其他成像模式的哈德玛单像素成像（HSI）系统。系统地研究了激光功率、投影率和水浊度对最终图像质量的影响。结果表明，与最先进的 SPI 技术相比，由于其高分辨率和抗散射能力，所提出的 HSI 系统在水下成像方面更具潜力。
