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Coastline Detection with Time Series of SAR Images

Ao, Dongyang and Dumitru, Corneliu Octavian and Schwarz, Gottfried and Datcu, Mihai (2017) Coastline Detection with Time Series of SAR Images. In: Proceedings of SPIE, pp. 1-9. SPIE Remote Sensing, 11.-14. Sept 2017, Warschau, Polen.

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For maritime remote sensing, coastline detection is a vital task. With continuous coastline detection results from satellite image time series, the actual shoreline, the sea level, and environmental parameters can be observed to support coastal management and disaster warning. Established coastline detection methods are often based on SAR images and well-known image processing approaches. These methods involve a lot of complicated data processing, which is a big challenge for remote sensing time series. Additionally, a number of SAR satellites operating with polarimetric capabilities have been launched in recent years, and many investigations of target characteristics in radar polarization have been performed. In this paper, a fast and efficient coastline detection method is proposed which comprises three steps. First, we calculate a modified correlation coefficient of two SAR images of different polarization. This coefficient differs from the traditional computation where normalization is needed. Through this modified approach, the separation between sea and land becomes more prominent. Second, we set a histogram-based threshold to distinguish between sea and land within the given image. The histogram is derived from the statistical distribution of the polarized SAR image pixel amplitudes. Third, we extract continuous coastlines using a Canny image edge detector that is rather immune to speckle noise. Finally, the individual coastlines derived from time series of .SAR images can be checked for changes.

Item URL in elib:https://elib.dlr.de/115221/
Document Type:Conference or Workshop Item (Speech)
Title:Coastline Detection with Time Series of SAR Images
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ao, Dongyangdongyang.ao (at) dlr.deUNSPECIFIED
Dumitru, Corneliu OctavianCorneliu.Dumitru (at) dlr.deUNSPECIFIED
Schwarz, GottfriedGottfried.Schwarz (at) dlr.deUNSPECIFIED
Datcu, MihaiMihai.Datcu (at) dlr.deUNSPECIFIED
Date:September 2017
Journal or Publication Title:Proceedings of SPIE
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 1-9
Keywords:SAR images, SAR polarimetry, coastline detection, time series images
Event Title:SPIE Remote Sensing
Event Location:Warschau, Polen
Event Type:international Conference
Event Dates:11.-14. Sept 2017
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben hochauflösende Fernerkundungsverfahren
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Photogrammetry and Image Analysis
Deposited By: Dumitru, Corneliu Octavian
Deposited On:15 Nov 2017 12:36
Last Modified:08 Feb 2018 13:18

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