基于鲁棒光流算法的海表流场遥感观测研究

Study on the Remote Sensing Observation on Sea Surface Current Based on Robust Optical Flow Algorithm

海洋表面流场是海洋科学研究中需要着重考虑的环境参数,近实时的海洋表面流场精细化测量对海洋学研究有着重要意义,但是目前大多数海洋表面流场观测技术难以同步实现大范围近实时的海洋表面流场观测。文中在简要对比各类海洋表面流场测量方法的基础上,重点介绍了基于水色遥感图像观测反演海洋表面流场的鲁棒光流算法,该算法在流场计算过程中,能很好地保留流场细节信息。为直观验证本文测量方法的可靠性,文中提供了海洋表面流场的分析实例,同时给出了美国国家航空航天局(NASA)提供的OSCAR流场数据,对文中算法的可靠性进行了验证。

As one of the most essential ocean phenomena and parameters, sea surface current is an important environmental factor for the study of physical oceanography. Accurate and real-time measurement of sea surface currents is of great significance, but current technologies are not able to achieve simultaneous, near-real-time and large-scale sea surface observation. In this paper, some general reliable means to measure sea surface currents are presented and briefly introduced, with the robust optical flow algorithm expounded in a detailed manner, which is very useful for measuring complicated sea surface currents. This paper provides some real cases of analyzing sea surface currents, and the reliability can be verified by comparing with the OSCAR current field data provided by the National Aeronautics and Space Administration （NASA）.