关键词: 嫦娥二号, 局部坐标系, 配准, 拼接, 全局优化, 误差控制

Abstract:

To the point of high resolution and mass quantity of images from CE-2, a new projective coordinate system, named local coordinate system, which can be easily built and has a small distortion, was proposed. The DOM and DEM of one orbit could be broken down into some unattached small blocks, every one of which correspond to its own local coordinate system. After the block data was created, a global optimization method, which is based on the overlapped image corresponding points and take the rational polynomial as its model, was applied to correct the coordinate error between overlapped images with the goal of a good registration. There was no interference between image block sub nets because the correction was carried out only in every sub net, which effectively controlled the transfer of error. Experiments indicate the mass lunar images can be processed effectively on the PC by applying the proposed mosaic method and achieve a good result. The panoramic 3D lunar images can be produced at last.

Key words: CE-2, local coordinate system, registration, mosaic, global optimization, error control