Abstract:The contradiction between the large field of view and the high-resolution in the process of remote sensing satellite photographing has attracted wide attention of researchers at home and abroad. A fast mosaic algorithm based on camera parameter preserving is proposed. By down-sampling the high-resolution image and recovering the camera parameters by using the registration information of the low-resolution image, the method can improve the mosaic process and improve the efficiency of mosaic. The experimental results show that compared with the traditional mosaic method, this method can shorten the registration time by more than 2 times and improve the mosaic quality of the remote sensing images by 5%~35%. It is suitable for four kinds of scenes: architecture, forest, farmland and lake. The robustness and feasibility of this method are verified by mosaic experiments of remote sensing images with noise, brightness difference and different blurring degree.