We show that the quality of the underwater imaging can be effectively improved by utilizing the computational ghost imaging (CGI) scheme with shaped Lorentz sources. The formula for the point-spread function in the underwater CGI system with a shaped Lorentz source is derived theoretically, and numerical examples are given to see how the CGI quality can be affected by the oceanic turbulence, including the rate of dissipation of mean-square temperature, the rate of dissipation of turbulent kinetic energy per unit mass of fluid, and the relative strength of temperature salinity fluctuations, as well as the modulation factor of the shaped Lorentz source. In addition, the relative mean square error is applied to quantitatively evaluate the quality of the recovered images in our underwater CGI system. Compared with the widely used Gaussian source, our results show that the long-distance underwater CGI quality can be greatly enhanced by properly adjusting the modulation factor of the ...

中文翻译：

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具有定形洛伦兹源的高质量水下计算重影成像

我们表明，通过利用具有成形洛伦兹源的计算重影成像（CGI）方案可以有效地改善水下成像的质量。从理论上推导了具有定形洛伦兹源的水下CGI系统中点扩散函数的公式，并给出了数值示例，以查看CGI质量如何受到海洋湍流的影响，包括均方根的耗散率温度，单位质量流体中湍动能的耗散率，温度盐度波动的相对强度以及成形的Lorentz源的调制系数。此外，在我们的水下CGI系统中，相对均方误差用于定量评估恢复图像的质量。与广泛使用的高斯源相比，