Marine oil spill detection method and system of employing compact polarimetric SAR

Abstract

The invention discloses a marine oil spill detection method and system of employing a compact polarimetric SAR. The method comprises the following steps of firstly, extracting a compact polarimetric SAR covariance matrix; secondly, carrying out compact polarimetric fine Lee filtering on the compact polarimetric SAR covariance matrix; thirdly, carrying out compact polarimetric H / alpha decompositionon the compact polarimetric SAR covariance matrix after compact polarimetric fine Lee filtering to obtain a compact polarimetric entropy (H) and a compact polarimetric anisotropy (A) and carrying outH(1-A) combinational computing to obtain a compact polarimetric entropy and anisotropy joint distribution map (HA); and finally carrying out automatic segmentation and detection on the joint map through a Gaussian model-based minimum error threshold method and removing dark spots of suspected oil spill areas to obtain oil spill area results. The method is suitable for marine oil spill detection by employing the compact polarimetric SAR and is capable of filtering dark spot areas of suspected oil spill and quickly detecting marine oil spill areas.

Description

technical field [0001] The invention belongs to the technical field of marine remote sensing, and in particular relates to a marine oil spill detection method and system using reduced polarization SAR. Background technique [0002] Marine oil spill will pose a serious threat to the marine ecological environment and is one of the main sources of marine pollution. The natural leakage of subsea oilfields, the leakage during the exploitation of subsea oilfields, and the frequent occurrence of oil tanker leakage and collision accidents have all caused serious marine oil pollution. On April 20, 2010, an oil field leakage accident occurred during the exploitation of a subsea oil field in the Gulf of Mexico. The accident caused a large area of ​​crude oil leakage, and the damage to the ecology has continued to this day. On January 6, 2018, a Chinese cargo ship collided with the Panamanian oil tanker "Gisan", which caused the "Gisan" to catch fire and formed an oil pollution zone of...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of suspected oil spill dark spot interference in the process of single-polarization SAR oil spill detection, and the problem of large data volume and small width of full-polarization SAR, the present invention proposes a simplified polarization SAR ocean An oil spill detection method comprising the following steps:

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