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dc.contributor.advisorBrekke, Camilla
dc.contributor.advisorEspeseth, Martine M.
dc.contributor.authorKarisari, Vebjørn
dc.date.accessioned2018-08-22T10:35:17Z
dc.date.available2018-08-22T10:35:17Z
dc.date.issued2018-06-01
dc.description.abstractThis thesis focuses on the use of multi-polarization synthetic aperture radar (SAR) for characterization of marine oil spills. In particular, the potential of detecting internal zones within oil slicks in SAR scenes are investigated by a direct within-slick segmentation scheme, along with a sensitivity study of SAR measurements to the evolving nature of oil slicks. A simple, k-means clustering algorithm, along with a Gaussian Mixture Model are separately applied, giving rise to a comparative study of the internal class structures obtained by both strategies. As no optical imagery is available for verification, the within-slick segmentations are evaluated with respect to the behavior of a set of selected polarimetric features, the prevailing wind conditions and weathering processes. In addition, a fake zone detection scheme is established to help determine if the class structures obtained potentially reflect actual internal variations within the slicks. Further, the evolving nature of oil slicks is studied based on the temporal development of a set of selected geometric region descriptors. Two data sets are available for the investigation presented in this thesis, both captured by a full-polarization L-band airborne SAR system with high spatial- and temporal resolution. The results obtained with respect to the zone detection scheme developed supports the hypothesis of the existence of detectable zones within oil spills in SAR scenes. Additionally, the method established for studying the evolving nature of oil slicks is found convenient for accessing the general behavior of the slicks, and simplifies interpretation.en_US
dc.identifier.urihttps://hdl.handle.net/10037/13532
dc.language.isoengen_US
dc.publisherUiT The Arctic University of Norwayen_US
dc.publisherUiT Norges arktiske universiteten_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2018 The Author(s)
dc.subject.courseIDEOM-3901
dc.subjectRemote sensingen_US
dc.subjectSynthetic Aperture Radaren_US
dc.subjectOil spillen_US
dc.subjectZoningen_US
dc.subjectPolarimetryen_US
dc.subjectMachine learningen_US
dc.subjectFull-polarizationen_US
dc.subjectMulti-polarization featuresen_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Informasjons- og kommunikasjonsvitenskap: 420::Simulering, visualisering, signalbehandling, bildeanalyse: 429en_US
dc.subjectVDP::Mathematics and natural science: 400::Information and communication science: 420::Simulation, visualization, signal processing, image processing: 429en_US
dc.titleA Sensitivity Study of L-Band Synthetic Aperture Radar Measurements to the Internal Variations and Evolving Nature of Oil Slicksen_US
dc.typeMaster thesisen_US
dc.typeMastergradsoppgaveen_US


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