深空光学敏感器“拖尾图像”的处理方法研究  

Processing Method of "Trailed Image" for Deep Space Optical Sensor

作　　者：毛晓艳[1,2] 王大轶[1,2] 辛优美[1,2] 应磊[1,2] 

机构地区：[1]北京控制工程研究所,北京100190 [2]空间智能控制技术国家级重点实验室,北京100190

出　　处：《空间控制技术与应用》2010年第2期1-5,19,共6页Aerospace Control and Application

摘　　要：主要研究深空探测巡航段的光学敏感器拖尾图像的处理方法,通过导航信息预测得到系列特征运动轨迹点,对预测点进行修正并进行特征模板的提取和归一化处理,然后进行交互相关,给出多个轨迹线上匹配的对应点位置,计算偏移量,对轨迹点进行修正,更新模板进行相关,再次迭代,直到结果收敛.最后对多个点的位置进行加权平均,得到准确的相对角矩信息,用于星图识别提供小行星指向信息,文中给出了图像处理的仿真结果.The core of this article puts emphasis on processing trailed images in cruise phase in deep space exploration for automatic optical navigation. Depending on measure information of a navigation system, the characteristic points expressing the sharp movement are obtained. These points are revised, picked up and normalized. Then the multi-cross-correlations can be done and results are correlation points on different extended image trails. After offset is calculated, the points are updated, then be revised, picked up and cross-correlated iterated again and again, till results are convergent. The individual measurements are weighted by the correlation ratio. Correct match points are used to identify the stars to get the pointing information about the asteroid including the simulation result.

关 键 词：深空探测 光学导航 拖尾图像处理 互相关 

分 类 号：TP751[自动化与计算机技术—检测技术与自动化装置]