A Robust Image Stitching and Geometric Correction Method for Doppler Beam Sharpening Imaging

Doppler beam sharpening (DBS) is an effective working mode for quickly scanning and imaging to a large-scale scene. In this mode, the antenna beam direction is changing so that images from different slant angles can be spliced into a wide scale of image. In practical applications, the aircraft attitude is always affected by the unstable atmosphere, so the beam pointing has deviation compared with the ideal value, which introduces errors to image stitching and geometric correction. For this problem, a robust image stitching and geometric correction method is proposed in this paper, it has better performance when the platform is unstable, which is uncomplicated and suitable for real-time processing. The effectiveness of the proposed method is verified by real measured data experiments.