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Sensors 2018, 18(6), 1898;

Coastline Detection with Gaofen-3 SAR Images Using an Improved FCM Method

2,3,* , 1,4
School of Geosciences and Info-physics, Central South University, Changsha 410083, China
College of Resources and Environmental Science, Hunan Normal University, Changsha 410081, China
Key Laboratory of Geospatial Big Data Mining and Application, Hunan Normal University, Changsha 410081, China
Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring (Central South University), Ministry of Education, Changsha 410083, China
Author to whom correspondence should be addressed.
Received: 28 March 2018 / Revised: 23 May 2018 / Accepted: 28 May 2018 / Published: 11 June 2018
(This article belongs to the Special Issue First Experiences with Chinese Gaofen-3 SAR Sensor)
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The coastline detection is one of the main applications of the Gaofen-3 satellite in the ocean field. However, the capability of Gaofen-3 SAR image in coastline detection has not yet been validated. In this paper, two Gaofen-3 SAR images, acquired in 2016, were used to extract the coastlines of the regions of Bohai and Taihu in China, respectively. The classical Fuzzy C-means (FCM) method was used in the coastline detection, but had been improved by combining the Wavelet decomposition algorithm to better suppress the inherent speckle noises of SAR image. Coastline detection results obtained from two Sentinel-1 SAR images acquired on the same regions were compared with those of the Gaofen-3 images. By using the manually delineated coastlines as the standards in the qualitative evaluations, improvements of about 12.0%, 8.3%, 23.8%, and 9.4% can be achieved by the improved FCM method with respect to the indicators of mean, RMSE, PGSD, and P90%, respectively; demonstrating that the Gaofen-3 data is superior to the Sentinel-1 data in the detection of coastline. View Full-Text
Keywords: Gaofen-3; SAR; coastline detection; Bohai; Taihu; FCM; wavelet decomposition Gaofen-3; SAR; coastline detection; Bohai; Taihu; FCM; wavelet decomposition

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An, M.; Sun, Q.; Hu, J.; Tang, Y.; Zhu, Z. Coastline Detection with Gaofen-3 SAR Images Using an Improved FCM Method. Sensors 2018, 18, 1898.

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