月面探测中的单目相机成像测量方法  

Measurement Method Based on Image of Mono-view in Lunar Exploration

作　　者：李立春[1,2] 许颖慧[1] 孟彦鹏[1] 张祖丽 张伟[1] 万文辉 周建亮[1] 

机构地区：[1]北京航天飞行控制中心,北京100094 [2]国防科学技术大学航天科学与工程学院,长沙410073 [3]中科院遥感与数字地球研究所遥感科学国家重点实验室,北京100101

出　　处：《航天返回与遥感》2015年第5期36-43,共8页Spacecraft Recovery & Remote Sensing

基　　金：国家自然科学基金(61173080)

摘　　要：针对月面着陆及就位探测过程中各类相机成像的工程实际,文章分析了降落过程单目成像的特定条件,提出了降落相机序列成像单应矫正的大场景高分辨率图像生成方法,在此基础上提出了基于图像匹配的着陆过程飞行器定位方法;针对着陆后就位探测所具备的位姿与场景约束信息,提出了应用单目成像的平面场景内目标测量;对远距离成像提出基于弱透视的目标距离与方位计算方法。这些方法已经应用在"嫦娥三号"任务着陆与就位探测中降落相机、监视相机、地形地貌相机等相机成像的处理,为探测过程提供了及时准确的测量信息。Aiming at soft-landing and in-situ probing of the spacecraft in lunar exploration, the imaging conditions of the descent camera are analyzed, base on which a wide-image generating method is proposed which employs the homography on the image sequences of landing process, and then the spacecraft locating algorithm based on a rectified wide image is proposed. For the work of in-situ probing, in which the information including the imaging pose, position information and planar scene is known, an object measuring method based on mono-view image is proposed. For the far objects, a method estimating distance and direction is proposed which is based on a weak projection imaging model. The methods presented in this paper have been proved by the images processing of descent camera and monitoring camera in the CE-3 lunar exploring task, which provides the correct measurement results effectively.

关 键 词：单目成像 飞行器定位 目标测量 平面约束 就位探测 月面着陆 

分 类 号：V448.2[航空宇航科学与技术—飞行器设计]