摘要
水面太阳耀光导致光学图像存在耀斑和舰船目标细节信息丢失。提出了一种偏振滤光结合多项式拟合的水面太阳耀光抑制方法。该方法基于水面太阳反射耀光的偏振特性,在成像光路中利用偏振片对耀光进行偏振滤光,对偏振滤光图像中的耀光区域采用多项式拟合估计进行修复。搭建了室外水面耀光偏振成像实验装置,采集得到水面耀光的偏振滤光图像,分别采用基于最小二乘法的多项式列方向曲线、行方向曲线、曲面、逐行多项式曲线拟合的方法对偏振滤光图像进行处理。实验结果表明:偏振滤光和逐行多项式拟合相结合的方法能够有效去除太阳耀光,使得处理后的图像亮度更加自然,既不包含饱和像素,又凸显舰船目标的细节信息。
The sun glint on the water surface leads to flares in the optical images and loss of ship target detail information. This paper presents a method of suppressing sun glint on water surface by combining polarization filtering and polynomial fitting. In an imaging optical path, a polarizer is used to filter the glint based on the polarization characteristics of sun glint reflected from the water surface, and the glint areas in the polarization filtering images are estimated through polynomial fitting estimation. The water surface glint polarization imaging experimental device lint is constructed, and the polarization filtered image of the water surface glint is acquired. Polynomial column direction curve, row direction curve, surface, and line-by-line polynomial curve fitting methods based on the least square method are used to process the polarization filtered image. The experimental results show that using a polarization filter in conjunction with a line-by-line polynomial fitting method can effectively remove the sun glint while also making the processed image brightness more natural, not including saturated pixels and highlighting the details of the ship targets.
作者
杨梅梅
赵佩瑶
冯斌
赵峰
Yang Meimei;Zhao Peiyao;Feng Bin;Zhao Feng(School of Electronic Engineering,Xi'an University of Posts and Telecommmnicatioms,Xi'an,Shaaneri 710121,China;School of Telecommumications Engineering,Xidian University,Xi'an,Shaanei 710126,China;School of Automation,North wvestern Polytechnical University,Xi'an,Shaanxi 710072,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2021年第24期117-128,共12页
Laser & Optoelectronics Progress
基金
国家重点研发计划(2018YFB1309403)
中央高校基本科研业务费专项基金(3102019ZDHKY08)。
关键词
大气光学
太阳耀光
偏振滤光
最小二乘法
多项式拟合
舰船目标
atmospheric optics
sun glint
polarization filtering
least square method
polynomial fitting
ship target
