Measurements of the radar backscattering over different oceanic surface films during the SIR-C/X-SAR campaigns

Gade, Martin; Alpers, Werner; Bao, Mingquan; Hühnerfuß, Heinrich

doi:10.1109/igarss.1996.516501

Cited by 9 publications

(6 citation statements)

References 2 publications

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“…Bern et al, 1993;Gade et al, 1996). As the angle of incidence of the radar beam from orbit is oblique to the sea surface specular reflection from calm water is directed away from the sensor.…”

Section: Geophysical Interpretation and Hydrocarbon Explorationmentioning

confidence: 97%

Old marine seismic and new satellite radar data: Petroleum exploration of north west Labrador Sea, Canada

Jauer

Budkewitsch²

2010

Marine and Petroleum Geology

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Section: Geophysical Interpretation and Hydrocarbon Explorationmentioning

confidence: 97%

Old marine seismic and new satellite radar data: Petroleum exploration of north west Labrador Sea, Canada

Jauer

Budkewitsch²

2010

Marine and Petroleum Geology

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“…Using differences in multi-frequency and multi-polarization signatures, an algorithm for discrimination between oil spills and look-alikes was proposed by Maio et al 9 However, it works only at low to moderate wind speeds. 10 Differences between polarization signatures are found only for low wind speeds and small incidence angles. Although there are some restrictions to detect marine oil spills from SAR images, there are some rules to be followed for oil spill detection.…”

Section: Introductionmentioning

confidence: 93%

Satellite observations of oil spill in the waters adjacent to Taiwan

Kuo

Liu³

et al. 2006

SPIE Proceedings

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Synthetic Aperture Radar (SAR) images from European Remote Sensing (ERS) satellites are used to investigate oil spill from ship navigations in the water adjacent to Taiwan. A total number of 136 images taken from 1993 to 1997 are used in this study. On the 136 images, only 46 images showing the possibility of oil spill which are based on the position and the shape of the discharge, the path of the ship, the sea characteristics of the area, and the weather conditions. The result shows that oil spill occurs most frequently in spring and least in winter. The sea area off eastern Taiwan has a probability which far surpassed other areas, followed by the middle sea area, the northern sea area, and the southern sea area.Regarding the oil spills at different areas with the distance to the shore, the oil spills at the middle area, with an average distance of 50 km (28 nautical miles), is closer than those at other areas. The statistical analysis demonstrates that the oil spill around Taiwan mostly occurs over 44 km (24 nautical miles) away from shore. Therefore, it is obvious that the probability of oil spills occurring as a ship leaves or enters the harbor is not high. Instead, the majority of oil spills takes place from middle to long distance navigating fishing boats as well as from oil and cargo freighters navigating international waterways.

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“…While various efforts have been directed to the characterization and identification of oil spills, e.g. distinguishing them from other similar oceanic features or look-alikes such as low wind speed areas, wind sheltering, rain cells, and grease ice (Hovland et al 1994, Gade et al 1996, Anne et al 1999, Fiscella et al 2000, this paper sets the focus on the segmentation of oil slicks using a novel image processing method.…”

Section: Introductionmentioning

confidence: 99%

A level set method for oil slick segmentation in SAR images

Huang

2005

International Journal of Remote Sensing

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Despite much effort and significant progress in recent years, image segmentation remains a challenging problem in image processing, especially for the low contrast, noisy synthetic aperture radar (SAR) images. This paper explores the segmentation of oil slicks using a partial differential equation (PDE)-based level set method, which represents the slick surface as an implicit propagation interface. Starting from an initial estimation with priori information, the level set method creates a set of speed functions to detect the position of the propagation interface. Specifically, the image intensity gradient and the curvature flow are utilized together to determine the speed and direction of the propagation. This allows the front interface to propagate naturally with topological changes, significant protrusions and narrow regions, giving rise to stable and smooth boundaries that discriminate oil slicks from the surrounding water. As the speckles are removed concurrently while the front interface propagates, the prefiltering of noise is saved. The proposed method has been illustrated by experiments on oil slick segmentation using the ERS-2 SAR images. Its advantages over the traditional image segmentation approaches have also been demonstrated.

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Measurements of the radar backscattering over different oceanic surface films during the SIR-C/X-SAR campaigns

Cited by 9 publications

References 2 publications

Old marine seismic and new satellite radar data: Petroleum exploration of north west Labrador Sea, Canada

Old marine seismic and new satellite radar data: Petroleum exploration of north west Labrador Sea, Canada

Satellite observations of oil spill in the waters adjacent to Taiwan

A level set method for oil slick segmentation in SAR images

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