Research on shadow enhancement for synthetic aperture sonar images

被引：0

作者：

Zhang, Peng-Fei ^{[1
]}

Liu, Wei ^{[1
]}

Jiang, Ze-Lin ^{[1
]}

Liu, Ji-Yuan ^{[1
]}

Zhang, Chun-Hua ^{[1
]}

机构：

[1] Institute of Acoustics, Chinese Academy of Sciences, Beijing

来源：

Binggong Xuebao/Acta Armamentarii | 2015年 / 36卷 / 02期

关键词：

Information processing; Non-uniform sampling; Shadow enhancement; Synthetic aperture sonar; Target recognition;

D O I：

10.3969/j.issn.1000-1093.2015.02.017

中图分类号：

学科分类号：

摘要：

Synthetic aperture sonar needs to collect the echoes from a target at different locations, which blurs the contour of shadow cast of targets. The conventional methods cannot obtain good effects because of lack in exploitation of synthetic aperture principle. A rigorous derivation of fixed focus shadow enhancement (FFSE) algorithm is presented, and time domain, frequency domain and range-Doppler domain are conducted. For synthetic aperture sonars, many receivers are used to increase efficiency. Non-uniform fast Fourier transform (NSFFT) is used to eliminate non-uniform sampling in azimuth direction, and then shadow enhancement can be applied in range-Doppler domain. The method is applied to lake-trial data set and sea-trial data set. Results show that the shadows of objects are enhanced evidently, which is great significance to image segmentation and target identification. ©, 2015, China Ordnance Society. All right reserved.

引用

页码：305 / 312

页数：7

共 17 条

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