# Multi-Band Polarization Imaging in a Harsh Sea Fog Environment
## 1 Introduction  
As a result of the extraction and use of marine resources, study in several aspects of the marine environment has become more specialized. In recent years, the study of polarized light has become a hot topic, and its detection and imaging aspects have attracted interest from all fields. Different target materials produce polarization properties that are determined by their own characteristics [1], and polarization can effectively distinguish scatterers of different materials and surface morphology. Consequently, polarization imaging technology may acquire not only classic intensity imaging data information [2,3] but also multidimensional polarization data.  
Polarimetric imaging of the sea fog environment has been the subject of a great deal of local and international study. [PERSON], et al. [4] devised a high-spatial-resolution, simultaneous-imaging polarimetry for satellite platform environments while simultaneously obtaining the target Stokes parameters to prevent sea glare, sea fog, atmospheric radiation, etc. [PERSON], [PERSON], et al. [5] developed a polarization transfer model based on RT3/ PolRadtran (polarized radiative transfer) in a sea fog environment, using the Mie scattering theory and taking into consideration the physical properties of sea fog. The PolRatran (polarized radiative transfer) model for polarization transfer in sea fog environment was tested, and the findings indicate that circularly polarized light has superior polarizationretention properties in comparison to linearly polarized light at the same contrast setting. In the visible spectrum, the penetration of incoming light rises with wavelength, and the quantity of salt in sea fog influences the degree of polarization. [PERSON], [PERSON], et al. [6] suggested a polarization defogging approach based on the study of the distribution of the angle of polarization (AOP), which was shown to significantly improve the contrast and visible range of photos captured in a thick fog environment. [PERSON], [PERSON], et al. [7] achieved a significant improvement in fog obscuration by employing a novel method based on a clever combination of spectral band and polarization analysis coupled with advanced image processing techniques utilizing an existing visible passive full Stokes polarization imaging camera, \"SALSA.\" [PERSON], [PERSON], et al. [8] constructed an experimental setup for real-time polarization imaging using a focal plane long-wave infrared polarization detector on a standard laboratory target and applied it to a shipboard sea surface. [PERSON], [PERSON], et al. [9] suggested a scSE-LinkNet model for daytime sea fog detection that employs residual blocks to encode feature maps and learns sea fog data features by taking into account the spectral and spatial information of nodes.  
The majority of extant research on foggy pictures focuses on the origins and consequences of fog production on land. A more comprehensive and systematic treatment of the sea fog environment and imaging elements is lacking. In this research, the polarization state representation of light based on the Stokes vector is applied to the concept of liquid crystal phase delayers to create polarization pictures. In addition, the optical imaging platform is constructed outside for sea fog imaging research, with sea fog serving as the imaging medium. The pictures including polarization parameters are acquired by image processing, and the polarization images are examined primarily from two perspectives: multi-band and optical thickness of the sea fog medium. It offers theoretical and technological assistance for the identification of maritime objects using high-precision imaging.