强光背景下主动偏振成像方法OA北大核心CSTPCD

In this study,we propose an active polarization imaging method based on laser illumination to tackle the issue of low target detection contrast in strong light backgrounds,which is a challenge in conven-tional photoelectric detection.Through constructing a laser incident bidirectional reflection distribution mod-el,a laser incident polarization bidirectional reflection distribution model and a target surface polarization model of laser illumination,the coupling relationship between the polarization characteristics of three typical target materials and the divergence angle of a laser beam is analyzed.Backlight observation experiments are conducted in a controlled darkroom to verify the impact of the scattering angle of the laser beam on the polar-ization characteristics of the target.The experimental results show an 86.11%increase in target contrast for active polarization imaging under strong light background compared to traditional passive intensity imaging.Additionally,the visible polarization characteristics of different target materials vary with different diver-gence angles,and the line polarization of metallic materials is higher than that of non-metallic materials.The experimental results are in good agreement with the theoretical analysis.The outdoor solar backlight observa-tion experiment verifies the applicability of the research method in high-intensity light and long-distance set-tings.This study can lay a theoretical foundation for improving accurate target perception under a strong light background.