星敏感器抗杂光的复合型背景估计星图处理算法  

Composite Background Estimation Star Map Processing Algorithm for Star Sensor Resistant to Stray Light

作　　者：赵明程 杨世洪 吕升林[5] 金峥 赵汝进 ZHAO Mingcheng;YANG Shihong;LüShenglin;JIN Zheng;ZHAO Rujin(National Key Lab.of Optical Field Manipulation Science and Technol.,Chinese Academy of Sciences,Chengdu 610209,CHN;Key Lab.of Science and Technol.on Space Optoelectronic Precision Measurement,Chinese Academy of Sciences,Chengdu 610209,CHN;Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu 610209,CHN;Electrical and Communication Engineering,University of Chinese Academy of Sciences School of Electronic,Beijing 100049,CHN;The Fifth Military Representative Office of the Air Force Equipment Department in Chengdu,Chengdu 610042,CHN)

机构地区：[1]中国科学院光场调控科学技术全国重点实验室,成都610209 [2]中国科学院空间光电精密测量技术重点实验室,成都610209 [3]中国科学院光电技术研究所,成都610209 [4]中国科学院大学电子电气与通信工程学院,北京100049 [5]空军装备部驻成都地区第五军事代表室,成都610042

出　　处：《半导体光电》2023年第4期627-632,共6页Semiconductor Optoelectronics

基　　金：四川省科技创新创业人才及苗子工程项目(2022JDRC0065)。

摘　　要：星敏感器在太空作业时,易受到太阳光、月光和地气光等杂光的干扰,导致拍摄的星图灰度整体升高,背景均匀性较差,难以准确提取到星点坐标。针对上述问题并结合现有算法提出了一种复合型背景估计的杂光干扰下星图处理算法。首先,星点具有经点扩散成像后尺寸为直径3×3至7×7的特征,设计相应的背景估计模板,最后为提高算法鲁棒性,提高局部信息的利用率,再设计一个像素估计模板,两个估计模板同时计算后处理数据实现阈值分割;最后进行星点质心计算。通过试验证明该方法可以较好地抵抗杂光干扰,提高杂光背景下星点提取的精度。When the star sensor is operating in space,it is easy to be interfered by stray light such as sunlight,moonlight and earth-air light.As a result,the overall gray level of the star map taken is increased,the background uniformity is poor,and it is difficult to accurately extract the star coordinates.Aiming at the above problems and combining the existing algorithms,a composite background estimation star map processing algorithm under stray light interference is proposed.First of all,star points had the characteristics of dimensions ranging from 3×3 to 7×7 in diameter after point diffusion imaging,so the corresponding background estimation template was designed.Then,in order to improve the robustness of the algorithm and the utilization rate of local information,a pixel estimation template was designed.The two estimation templates calculate the post-processing data at the same time to achieve threshold segmentation,and then the centroid of star points was calculated.This method can better resist stray light interference and improve the accuracy of star extraction under stray light background.

关 键 词：星敏感器 星点提取 背景估计 

分 类 号：TN966.7[电子电信—信号与信息处理] TP23[电子电信—信息与通信工程]