一种超轻量化卫星目标形心定位算法

刘路远; 韩璐瑶; 李娇娇; 夏晖; 饶鹏; 宋锐

doi:10.19665/j.issn1001-2400.20230307

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一种超轻量化卫星目标形心定位算法

信息与通信工程&计算机科学与技术 | 更新时间：2024-01-22

- 一种超轻量化卫星目标形心定位算法
- 暂无标题
- 西安电子科技大学学报 2023年50卷第6期页码：120-132
- 作者机构：
  
  1. 西安电子科技大学空天地一体化综合业务网全国重点实验室,陕西西安 710071
  2. 中国科学院上海技术物理研究所,中国科学院红外探测与成像技术重点实验室,上海 200083
- 作者简介：
  
  [ "刘路远(2000—),男,西安电子科技大学硕士研究生,E-mail:[email protected];" ]
  [ "韩璐瑶(1996—),女,西安电子科技大学硕士研究生,E-mail:[email protected];" ]
  [ "李娇娇(1987—),女,副教授,E-mail:[email protected];" ]
  [ "夏晖(1979—),女,副研究员,E-mail:[email protected]; " ]
  [ "饶鹏(1977—),男,研究员,E-mail:[email protected]。" ]
  宋锐(1982—),男,教授,E-mail:[email protected]
- 基金信息：
  
  芜湖-西电产学研合作专项资金(XWYCXY-012021002);国家自然科学基金青年基金(61901343);高等学校学科创新引智计划(111计划)(B08038);地理信息工程国家重点实验室基金(SKLGIE2020-M-3-1);中国博士后特别资助科学基金(2018T111019);陕西高校青年创新团队
- DOI：10.19665/j.issn1001-2400.20230307
  中图分类号：
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刘路远, 韩璐瑶, 李娇娇, 等. 一种超轻量化卫星目标形心定位算法[J]. 西安电子科技大学学报, 2023,50(6):120-132.
刘路远, 韩璐瑶, 李娇娇, 等. 一种超轻量化卫星目标形心定位算法[J]. 西安电子科技大学学报, 2023,50(6):120-132. DOI： 10.19665/j.issn1001-2400.20230307.

DOI：

摘要

天基光电探测单元具有视场角大、载重小和机动灵活的特性,在空间作业的监视任务中有重要应用,其中卫星目标的识别和形心定位是其重要功能之一。由于目前在轨载荷处理器的算力较弱,在近距离测角任务中无法使用深度神经网络算法进行复杂定位。针对这一问题,深入分析了目标的特点,依据卫星几何特性设计了一种超轻量化实时处理方法。该算法设计了直线特征和帆板边缘特征提取器,提出了一种利用特殊几何关键点计算目标最小外接矩形的策略,提升外接矩形与目标边缘的贴合度。算法在仿真数据集上进行了测试,并在物理模拟试验场采集的影像数据上进行了验证。测试结果表明,算法的检测精度优于主流深度学习目标检测网络Yolov5n,计算量仅为对比算法的10%。在嵌入式实时处理平台上移植后,实时定位速度可达到5 120×5 120@5 fps。在验证环境下,基于所提算法形心定位的结果进行测角,测角精度优于0.05°,满足应用场景的精度要求。

Abstract

The space-based photoelectric detection unit is vital in satellite identification and positioning.It has a large field of view,a small load,and flexible maneuvering properties.However,the computational capability of the CPU mounted on an on-orbit satellite could be much higher,which can hardly afford the necessity of deep learning networks.In this paper,we analyze the character of space targets deeply and designed a lightweight real-time processing algorithm.We specifically design feature extractors for the line and satellite contour patterns in the algorithm and propose a minimum bounding box calculation strategy.The algorithm is tested on the simulation dataset and verified on the images captured by the physical emulation platform.Testing results demonstrate the effectiveness of our algorithm.The detecting accuracy of our algorithm is better than YOLOv5n,and the computational load is only 10% that of the competitive methods.We transplant the algorithm to an on-orbit real-time processing platform.The positioning speed reaches 5 120×5 [email protected] accuracy for angle measurement based on the centroid positioning results is more significant than 0.05°,which meets the requirement for real application systems.

关键词

空间站卫星目标定位目标检测实时处理

Keywords

spacecraftsatellitestarget positioningobject detectionreal-time processing

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