基于蒙特卡洛仿真的水下四点单目测距研究  

Research on Underwater Four-point Monocular Ranging based on Monte Carlo Simulation

作　　者：申玲菲 范婷威 胡谷雨 王杰 张大伟[1] 周田华[2] SHEN Ling-fei;FAN Ting-wei;HU Gu-yu;WANG Jie;ZHANG Da-wei;ZHOU Tian-hua(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Key Laboratory of Space Laser Communication and Detection Technology,Shanghai Institute of Optics and Fine Mechanics,Chinses Academy of Sciences,Shanghai 201800,China;The Ministry of Education Key Laboratory of Electromagnetic Wave Information Science,Department of Communication Science and Engineering,Fudan University,Shanghai 200433,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093 [2]中国科学院上海光学精密机械研究所,空间激光信息传输与探测技术重点实验室,上海201800 [3]复旦大学通信科学与工程系,电磁波信息科学教育部重点实验室,上海200433

出　　处：《光通信研究》2023年第4期60-67,共8页Study on Optical Communications

基　　金：国家重点研发计划资助项目(2022YFC2808100);国家自然科学基金青年科学基金资助项目(62205358);中国科学院战略性先导科技专项子课题资助项目(XDA22030206);国家自然科学基金重点资助项目(62031011);中国科学院创新基金资助项目(CXJJ-22S005)。

摘　　要：水下光通信系统在工作时需要及时获取与接收端的距离信息并进行高速通信。文章提出在水下蓝绿激光通信系统中加入单目测距功能,实现短距离视觉测距和长距离激光测距的水下光通信测距一体化研究。使用蒙特卡洛方法进行仿真,建立激光信号水下信道传输模型,模拟不同目标尺寸、不同距离和不同水质下的水下激光光斑图片,分析以上3种因素对水下单目测距精度的影响。考虑仿真图片光斑弥散和对比度降低对测距精度的影响,文章针对性地提出了一种对水下小尺寸光源目标、结合图像增强和Zernike矩亚像素点边缘检测的单目测距算法以提高单目测距算法的精度。通过实验室水池实验验证,文章所提算法精度达到了使用要求。In underwater optical communication systems,timely acquisition of distance information with the receiving end and high-speed communication are required.This paper proposes to integrate the monocular ranging function into the underwater blue-green laser communication system to realize the underwater optical communication ranging by integrating short-distance visual ranging and long-distance laser ranging.Using Monte Carlo method simulation,an underwater laser signal channel transmission model is established to simulate underwater laser spot images under different target sizes,distances and water qualities.We analyze the influence of these three factors on the accuracy of underwater monocular ranging.Considering the influence of spot diffusion and contrast reduction in simulated images on ranging accuracy,a monocular ranging algorithm is proposed that combines image enhancement and Zernike moments subpixel edge detection for small-sized underwater light source targets to improve the accuracy of the monocular ranging algorithm.Laboratory pool experiments were conducted to verify that the algorithm accuracy can meet the requirements.

关 键 词：水下激光通信测距 蒙特卡洛方法 小尺寸目标 图像增强 亚像素点边缘检测 

分 类 号：TN929[电子电信—通信与信息系统]