针对长时间间隔序贯SAR图像中运动舰船位置变化大、不易跟踪的难题，提出一种融合航迹起始和图像特征的匹配跟踪方法。首先从SAR图像中检测出舰船，得到舰船图像切片，并提取舰船的图像特征、空间位置信息；然后根据速度和加速度约束，将不同时刻的舰船关联，形成多条候选航迹；最后采用特征匹配差异最小原则筛选出舰船航迹，实现运动舰船跟踪。通过仿真实验和机载序贯SAR图像处理分析，验证所提方法的有效性。
Aiming at solving the difficult problem of tracking moving ships, which is caused by their great position variation in long time interval sequential SAR images, a matching tracking method combining track initiation and image feature is proposed. Firstly, the ships are detected from the SAR image to obtain the image slices and extract the ships' image features and spatial position information. Then, ships at different times are correlated to form multiple candidate trajectories according to the constraints of velocity and acceleration. Finally, ship trajectories are screened out based on the minimum difference principle of feature matching to realize moving ship tracking. The effectiveness of the proposed method is verified by simulation experiments and airborne sequential SAR images processing analysis.
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