Speckle suppression in synthetic aperture radar ocean internal solitary wave images with curvelet transform
Zha Guozhen; He Qingyou; Guan Changlong; Sun Jian; He Mingxia; Guan, CL (reprint author), Ocean Univ China, Coll Ocean & Atmospher Sci, Qingdao 266100, Peoples R China.; Guan, CL (reprint author), Ocean Univ China, Phys Oceanog Lab, Qingdao 266100, Peoples R China.
2016
发表期刊ACTA OCEANOLOGICA SINICA
卷号35期号:9页码:13-21
摘要This paper proposes a speckle-suppression method for ocean internal solitary wave (ISW) synthetic aperture radar (SAR) images by using the curvelet transform. The band-shaped signatures of ocean ISWs in SAR images show obvious scale and directional characteristics. The curvelet transform possesses a very high scale and directional sensitivity. Therefore, the curvelet transform is very efficient in analyzing wave signals in SAR images. A noisy ocean ISW SAR image can be decomposed at different scales, directions, and positions using the curvelet transform. The information of the ISWs is centralized in the curvelet coefficients of certain directions under certain scales, whereas the speckle noise is distributed in every scale and direction. By manipulating the curvelet coefficients, the signals of the ISWs can be extracted from the noisy SAR image. Finally, the speckle noise is suppressed and the ISW feature is enhanced by adding the signals of the ISWs back to the original SAR image. Experiments demonstrate the effectiveness of this method.
部门归属[Zha Guozhen; Guan Changlong; Sun Jian] Ocean Univ China, Coll Ocean & Atmospher Sci, Qingdao 266100, Peoples R China; [He Qingyou] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China; [He Qingyou] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Guan Changlong; Sun Jian] Ocean Univ China, Phys Oceanog Lab, Qingdao 266100, Peoples R China; [He Mingxia] Ocean Univ China, Ocean Remote Sensing Inst, Qingdao 266100, Peoples R China ; LTO
关键词Curvelet Transform Internal Solitary Wave Remote Sensing Speckle Noise Synthetic Aperture Radar
学科领域Oceanography
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/15251
专题热带海洋环境国家重点实验室(LTO)
通讯作者Guan, CL (reprint author), Ocean Univ China, Coll Ocean & Atmospher Sci, Qingdao 266100, Peoples R China.; Guan, CL (reprint author), Ocean Univ China, Phys Oceanog Lab, Qingdao 266100, Peoples R China.
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GB/T 7714
Zha Guozhen,He Qingyou,Guan Changlong,et al. Speckle suppression in synthetic aperture radar ocean internal solitary wave images with curvelet transform[J]. ACTA OCEANOLOGICA SINICA,2016,35(9):13-21.
APA Zha Guozhen.,He Qingyou.,Guan Changlong.,Sun Jian.,He Mingxia.,...&Guan, CL .(2016).Speckle suppression in synthetic aperture radar ocean internal solitary wave images with curvelet transform.ACTA OCEANOLOGICA SINICA,35(9),13-21.
MLA Zha Guozhen,et al."Speckle suppression in synthetic aperture radar ocean internal solitary wave images with curvelet transform".ACTA OCEANOLOGICA SINICA 35.9(2016):13-21.
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