:Distributed aperture infrared (DAIRS) system is the key development direction of infrared search and tracking systems in various countries. To reduce the redundancy,the DAIRS system usually reduce the overlap area to obtain wide field coverage,which leads to the shortage of the extracted features in the process of image stitching based on feature method. In this paper,by building three-dimensional rotation model and applying image registration based on gradient descent,three-dimensional reconstruction is done with iteration of multi-frame iteration on the dimension of time. Then the improved brightness adjustment algorithm and multi-resolution fusion of transition region are applied to eliminate the stitching traces. Experimental results show that the algorithm achieves seamless stitching of panoramic images for plane projection and cylindrical projection,and multi-resolution fusion of transition areas is beneficial to eliminate the fuzzy phenomenon.