图像配准是拼接技术重要的步骤之一，其配准精度能够直接影响到接来下的图像融合过程，从而影响到拼接图像的质量。因此拼接技术的研究重点是在实现更高精度和可靠性从而保证拼接图像的高品质。具体地说，图像配准是对于一组图像数据集中的两幅图像，通过寻找一种空间变换把一幅图像映射到另一幅图像，使得两图中对应于空间同一位置的点一一对应起来，从而达到信息融合的目的。(Image registration is one of the most important steps in mosaic technology. Its registration accuracy can directly affect the process of image fusion and the quality of mosaic image. Therefore, the research focus of mosaic technology is to achieve higher accuracy and reliability so as to ensure the high quality of mosaic images. Specifically, image registration is to map one image to another by finding a spatial transformation for two images in a set of image data, so that the points corresponding to the same location in space in the two images correspond to each other one by one, so as to achieve the purpose of information fusion.)