Mosaicing of aerial images is important to image intelligence analysis in military. In this paper

characteristic of aerial optical imaging and parameters of aerial platform are analyzed. Based on the principle of perspective projection model

the coordinate transform relationship between pixel coordinate and world coordinate is mainly deduced under oblique projection

and rough mosaicing regions of the two images are calculated under world coordinate

in this step

not much attention is paid to the accuracy. Then

SIFT algorithm is employed to extract invariable feature from the rough mosaicing regions

and calculate the transform model parameters of the two images accurately

in order to realize mosaicing refinedly. Experiments results of field images show that the algorithm is time efficient and fine-results in mosaicing.