摘要
水体对不同可见光的选择性吸收和散射效应严重制约了光学成像的质量。偏振成像技术在高浊度、短距离水下环境中展现出显著优势。本研究基于红、绿和蓝3种激光的主动偏振成像系统,对比分析了浊度为10~25 NTU的典型自然水体的成像性能。实验结果表明:红光的偏振成像效果最优,绿光次之,蓝光最弱。此外,本文提出一种偏振图像增强算法,可显著提升3种激光的成像质量。当浊度为19.97 NTU时,与传统的Schechner方法相比,经本文方法增强后的潜水服布料图像熵提升了约34.4%。研究结果表明,将偏振成像引入激光主动成像系统可有效改善水下成像质量,为延伸水下光学成像距离提供了新思路。
The selective absorption and scattering effects of water on visible light of different wavelengths severely constrain the quality of optical imaging.Polarization imaging technology demonstrates significant advantages in high-turbidity,short-range underwater environments.This study employs an active polarization imaging system utilizing 3 laser wavelengths—red,green,and blue—to comparatively analyze imaging performance in typical natural water with turbidity levels of 10-25 NTU.Experimental results indicate that red light achieves the optimal polarization imaging performance,followed by green light,while blue light performs the weakest.Furthermore,a polarization image enhancement algorithm is proposed,which significantly improves the imaging quality for all 3 laser wavelengths.Under a turbidity condition of 19.97 NTU,the entropy value of enhanced images of diving suit fabric using the proposed method shows an approximately 34.4%improvement compared to the traditional Schechner method.The research demonstrates that integrating polarization imaging into active laser imaging systems can effectively enhance underwater imaging quality,offering new insights for optimizing underwater imaging technology at specific wavelengths.
作者
陈帅宝
刘鹏
何为
谈宇光
陈良培
罗栋
焦国华
陈巍
CHEN Shuaibao;LIU Peng;HE Wei;TAN Yuguang;CHEN Liangpei;LUO Dong;JIAO Guohua;CHEN Wei(Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,China;Southern University of Science and Technology,Shenzhen 518055,China)
出处
《集成技术》
2025年第5期86-96,共11页
Journal of Integration Technology
基金
广东省水利科技创新项目(2022-03)。
关键词
水下成像
偏振成像
主动成像
图像增强
underwater imaging
polarization imaging
active imaging
image enhancement
