Marine oil spill detection method research based on Envisat ASAR images

Now, as an increasing number of marine oil spill accidents, marine oil spill detection research has received national attention. This paper describes the method of the Envisat ASAR SAR data detection oil spill information, the preprocessing and post-processing of Envisat ASAR date. In the pre-processing, we have achieved absolute calibration processing; geometric precision correction based on ground control points and enhanced LEE filter processing. In the oil spill information extraction phase we use manual threshold segmentation, automatic threshold segmentation and CFAR detection method for extraction of oil spills area. Test results show that the methods used to achieve good extraction effect.