摘要
针对探测器月球背面着陆点快速高精度定位问题,利用嫦娥四号探测器动力下降过程中的降落相机序列图像以及着陆区高精度地形图,提出了一种基于高精度图像匹配和几何变换的探测器着陆点高精度快速定位方法。考虑到嫦娥四号、三号任务在动力下降阶段的相似性,利用嫦娥三号降落相机相关数据进行了着陆点定位实验与精度验证。其中降落相机序列影像间的匹配精度达到子像素;降落相机变分辨率图像的拼接优于1个像素。该方法将降落相机序列图像进行拼接,有效扩大着陆区域范围,提高匹配成功率与计算效率,实时性较好,已应用于嫦娥四号探测器月面着陆定位。
To realize the fast and high-precision positioning of the landing location of the probe on the far side of the lunar surface,a positioning method was proposed on the basis of high-precision image matching and geometric transformation using the descent sequence images during the powered desceiit pkase and the high-precision Digital Orthophoto Map of the landing zone.Considering the similarity of Chang'e-3 and Chang'e-4 in the powered descent phase,the landing location experiment and the accuracy verification were carried out using the relevant Chang'e-3 descent data.The matching accuracy between sequent descent images was sub-pixel,and the stitching precision of the multi-resolution descent images was higher than 1 pixel.The experiments showed that the method proposed in this paper could effectively extend the range of the landing area,improve the mapping accuracy and the computation efficiency.It has been applied to Chang,e-4 mission.
作者
王镓
万文辉
赵焕洲
王保丰
彭嫚
荣志飞
WANG Jia;WAN Wenhui;ZHAO Huanzhou;WANG Baofeng;PENG Man;RONG Zhifei(Beijing Aerospace Control Center,Beijing 100094,China;State Key Laboratory of Remote Sensing Science,Beijing 100094,China;Institute of Remote Sensing and Digital Earth,Chinese Academy of Sciences,Beijing 100101,China)
出处
《载人航天》
CSCD
北大核心
2019年第1期12-18,共7页
Manned Spaceflight
基金
国家自然科学基金(41771488)
关键词
嫦娥四号
月球探测
着陆定位
图像匹配
Chang'e-4
lunar exploration
landing positioning
image matching
