Enhancement of SAR Ship Wake Image Based on FABEMD and Goldstein Filter
Zhang Wen-yi①②③ Hu Dong-hui①② Ding Chi-biao①②
①(Key Laboratory of Technology in Geo-spatial Information Processing and Application System, Chinese Academy of Sciences, Beijing 100190, China) ②(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China) ③(Graduate University of Chinese Academy of Sciences, Beijing 100039, China)
Abstract：Enhanced SAR ship wake images with blur Kelvin wakes and reserved turbulent wakes are very important to the inversions of ship and motion parameters. This paper applies the Fast and Adaptive Bidimensional Empirical Mode Decomposition (FABEMD) to decompose the SAR ship wake image into Kelvin wakes, turbulent wakes and other multiscale features, which enhances the gray intensity and spectrum contrast of Kelvin wakes to other features. Based on the FABEMD, a modified Goldstein interferogram filter is developed to further enhance the Kelvin wakes. Moreover, the moment invariants are introduced to evaluate the enhancement. Therefore, the Kelvin wakes are dramatically enhanced and the turbulent wakes are reserved. Algorithm analysis, experiments, subjective and objective evaluations show the reasonable efficiency and capabilities.
张问一, 胡东辉, 丁赤飚. 基于FABEMD 和Goldstein 滤波器的SAR 舰船尾迹图像增强方法[J]. 雷达学报, 2012, 1(4): 426-435.
Zhang Wen-yi, Hu Dong-hui, Ding Chi-biao. Enhancement of SAR Ship Wake Image Based on FABEMD and Goldstein Filter. JOURNAL OF RADARS, 2012, 1(4): 426-435.
