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以“嫦娥5T”地月合影图像作为基本数据,提出一种基于信息融合的相机指向校正方法。首先利用形态分析从合影图像中提取天体的形心坐标,然后构建目标函数,通过优化算法估计相机的安装误差矩阵。该方法的典型优势是只需要利用单个相机对天体所成的单幅图像,便可快速确定相机指向。仿真数据和实测数据得到相机指向误差估计值的偏差保持在1%度量级,证明了算法的有效性。算法可以为实际工程任务和应用提供参考。
Based on the image of “Chang’e 5T” to the moon and the moon as the basic data, a camera orientation correction method based on information fusion is proposed. First, the shape analysis is used to extract the centroid coordinates of the celestial body from the photo images. Then the objective function is constructed and the camera’s installation error matrix is estimated through the optimization algorithm. A typical advantage of this approach is the rapid determination of the camera orientation using only a single image of the celestial body from a single camera. The deviation of the estimated error of the pointing error of the camera from the simulation data and the measured data is kept at 1%, which proves the effectiveness of the algorithm. The algorithm can provide reference for practical engineering tasks and applications.