More than 120 ENVISAT ASAR Alternating Polarization HH/HV images were acquired and analyzed over the southwest Indian Ocean in order to survey for shipping and fishing. The images were processed for ship detection, combining the detections in HH and HV and using a CFAR threshold that is adjusted a posteriori. The false alarm rate in HH is not only higher but also much more variable than in HV, so that the latter is preferred for more reliable ship detection results. In the end, only a small number of ships were found, underlining to need to collect large image data sets for maritime surveillance of wide areas.
VAN WIMERSMA GREIDANUS Herman;
ARDILL David;
ANSELL Neil;
THOORENS Francois-Xavier;
PERIES Pierre;
2010-03-31
International Center for Remote Sensing of Environment (ICRSE)
JRC56296
https://publications.jrc.ec.europa.eu/repository/handle/JRC56296,
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