基于图像的船舶尾迹跟踪方法研究与仿真

摘要

The research is about the accurate ship wake tracking based on SAR image. This paper proposed a ship wake tracking algorithm based on weak estimation of dispersion parameters of the pixels. According to the estimation of the strength of pixel dispersion parameters, direction of movement locus was evaluated in time domain of wake pixels to make up the influence of pixels dispersion, enhance echo characteristics, and overcome the defects of the traditional methods.The experiment proves that this method increases the accuracy of ship wake tracking and obtains the satisfactory results.%研究基于SAR图像的船舶尾迹准确跟踪问题.在船舶图像尾迹跟踪过程中,当海风增大、轮船航行突变时,采集跟踪的SAR轮船图像信号,尾迹像素会发生色散,图像中通过尾迹像素转换的,用于跟踪的尾迹回波特征发生衰退,造成传统的轮船回波特征的尾迹跟踪结果误差较大.为了避免上述问题,提出了一种基于像素色散参数弱估计的船舶尾迹跟踪算法.通过像素色散参数的强度预判,对尾迹像素时域内运动轨迹进行方向弱估计,弥补像素色散的影响,增强回波特性,克服传统方法的缺陷.实验证明,方法提高了船舶尾迹跟踪的准确度,取得了令人满意的效果.