Research on Underwater Skylight Orientation Based on Polarization

Abstract

Abstract Underwater skylight polarization orientation possesses various advantages, including high precision, strong anti-interference ability, high information acquisition rate, and the absence of error accumulation over time. To compute the polarization distribution of underwater skylight polarization image data, an image conversion algorithm is proposed. Subsequently, the least squares method is employed to extract the solar meridian from the polarization images, facilitating the calculation of underwater skylight polarization distribution and the high-precision extraction of polarization information. Through experiments conducted in different environments and at various time periods within the same location, a comparative analysis was undertaken between the azimuth angle of the solar meridian extracted from the actually detected polarization distribution maps and the solar azimuth angle simulated based on single Rayleigh scattering. The experimental data exhibited slight discrepancies, thereby validating the stability of underwater polarization distribution and the feasibility of determining the solar meridian direction.