面向海面反光抑制的最优偏振探测角度估计

打开文本图片集

Optimal polarization detection angle estimation for sea surface glint suppression

LIUPeng，NI Xinyu，DUANJin*，WANG Jialin，DONGKehan （School of Telecommunications， Changchun University of Science and Technology， Changchun130022，China） * Corresponding author，E-mail： duanjin@vip. sina. com

Abstract：In marine target detection，significant variations exist in the polarization signal strength received under different observation geometries.To enhance image quality and target recognition，an optimal polarization detection angle estimation method based on the Cox-Munk rough sea surface model is proposed. First，we analyze the effects of diferent wind speeds，wind directions，solar incidence zenith angles，observation zenith angles，and azimuth angles on polarization reflectivity and degree of polarization.Then， we establish quantitative relationships between diferent combinations of observation angles and the received polarization signal strength for the three components of the sun-surface-detector system.Finally， by maximizing polarization signal and polarization degree，the paper proposes the optimal combination of polarization observation angles under diffrent constrained observation geometries. The efective distribution of sea surface polarization reflectance is primarily concentrated in the azimuthal range from 150∘ to 210∘ ，with a relative peak occurring at an azimuth of 180∘ . Within this range，the peak of sea surface polarization occurs when the sum of the solar zenith angle and the observation zenith angle is approximately 106∘±6∘ . When the solar incidence zenith angle is 55∘ and the relative azimuth angles are 180∘ ， 165∘ ，and （204号 150∘ ，the observation zenith angles are close to the optimal observation zenith angles predicted by the simulation （approximately 51∘ ， 53∘ ，and 57∘ ，respectively）. By placing a polarizer with a polarization direction of 90∘ in front of the detector，the optimal reflectance suppression effect can be achieved，significantly improving the imaging quality of the target.

Key Words： sea surface reflected light; optimal polarization detection angle；Cox-Munk model; polarization reflection properties

1引言

在海洋目标探测过程中，海面强烈反射光所引发的耀光对探测器的成像质量和目标识别能力产生了严重的影响[1-2]。（剩余23117字）